diff options
Diffstat (limited to 'Misc/NEWS')
| -rw-r--r-- | Misc/NEWS | 7587 |
1 files changed, 3299 insertions, 4288 deletions
@@ -2,10 +2,10 @@ Python News +++++++++++ -What's New in Python 3.5.4 release candidate 1? +What's New in Python 3.6.1 release candidate 1? =============================================== -Release date: XXXX-XX-XX +*Release date: XXXX-XX-XX* Core and Builtins ----------------- @@ -13,6 +13,40 @@ Core and Builtins - Issue #29337: Fixed possible BytesWarning when compare the code objects. Warnings could be emitted at compile time. +- Issue #29327: Fixed a crash when pass the iterable keyword argument to + sorted(). + +- Issue #29034: Fix memory leak and use-after-free in os module (path_converter). + +- Issue #29159: Fix regression in bytes(x) when x.__index__() raises Exception. + +- Issue #28932: Do not include <sys/random.h> if it does not exist. + +- Issue #25677: Correct the positioning of the syntax error caret for + indented blocks. Based on patch by Michael Layzell. + +- Issue #29000: Fixed bytes formatting of octals with zero padding in alternate + form. + +- Issue #26919: On Android, operating system data is now always encoded/decoded + to/from UTF-8, instead of the locale encoding to avoid inconsistencies with + os.fsencode() and os.fsdecode() which are already using UTF-8. + +- Issue #28991: functools.lru_cache() was susceptible to an obscure reentrancy + bug triggerable by a monkey-patched len() function. + +- Issue #28739: f-string expressions are no longer accepted as docstrings and + by ast.literal_eval() even if they do not include expressions. + +- Issue #28512: Fixed setting the offset attribute of SyntaxError by + PyErr_SyntaxLocationEx() and PyErr_SyntaxLocationObject(). + +- Issue #28918: Fix the cross compilation of xxlimited when Python has been + built with Py_DEBUG defined. + +- Issue #28731: Optimize _PyDict_NewPresized() to create correct size dict. + Improve speed of dict literal with constant keys up to 30%. + Extension Modules ----------------- @@ -34,11 +68,14 @@ Library - Issue #28735: Fixed the comparison of mock.MagickMock with mock.ANY. -- Issue #29011: Fix an important omission by adding Deque to the typing module. +- Issue #29316: Restore the provisional status of typing module, add + corresponding note to documentation. Patch by Ivan L. - Issue #29219: Fixed infinite recursion in the repr of uninitialized ctypes.CDLL instances. +- Issue #29011: Fix an important omission by adding Deque to the typing module. + - Issue #28969: Fixed race condition in C implementation of functools.lru_cache. KeyError could be raised when cached function with full cache was simultaneously called from differen threads with the same uncached arguments. @@ -47,11 +84,74 @@ Library leading dots could match related hostnames again (e.g. .b.c matches a.b.c). Patch by Milan Oberkirch. +- Issue #28961: Fix unittest.mock._Call helper: don't ignore the name parameter + anymore. Patch written by Jiajun Huang. + +- Issue #29203: functools.lru_cache() now respects PEP 468 and preserves + the order of keyword arguments. f(a=1, b=2) is now cached separately + from f(b=2, a=1) since both calls could potentially give different results. + +- Issue #15812: inspect.getframeinfo() now correctly shows the first line of + a context. Patch by Sam Breese. + +- Issue #29094: Offsets in a ZIP file created with extern file object and modes + "w" and "x" now are relative to the start of the file. + +- Issue #29085: Allow random.Random.seed() to use high quality OS randomness + rather than the pid and time. + +- Issue #29061: Fixed bug in secrets.randbelow() which would hang when given + a negative input. Patch by Brendan Donegan. + +- Issue #29079: Prevent infinite loop in pathlib.resolve() on Windows + +- Issue #13051: Fixed recursion errors in large or resized + curses.textpad.Textbox. Based on patch by Tycho Andersen. + +- Issue #29119: Fix weakrefs in the pure python version of + collections.OrderedDict move_to_end() method. + Contributed by Andra Bogildea. + +- Issue #9770: curses.ascii predicates now work correctly with negative + integers. + +- Issue #28427: old keys should not remove new values from + WeakValueDictionary when collecting from another thread. + +- Issue 28923: Remove editor artifacts from Tix.py. + +- Issue #29055: Neaten-up empty population error on random.choice() + by suppressing the upstream exception. + +- Issue #28871: Fixed a crash when deallocate deep ElementTree. + +- Issue #19542: Fix bugs in WeakValueDictionary.setdefault() and + WeakValueDictionary.pop() when a GC collection happens in another + thread. + +- Issue #20191: Fixed a crash in resource.prlimit() when passing a sequence that + doesn't own its elements as limits. + +- Issue #28779: multiprocessing.set_forkserver_preload() would crash the + forkserver process if a preloaded module instantiated some + multiprocessing objects such as locks. + +- Issue #28847: dbm.dumb now supports reading read-only files and no longer + writes the index file when it is not changed. + +- Issue #26937: The chown() method of the tarfile.TarFile class does not fail + now when the grp module cannot be imported, as for example on Android + platforms. + Windows ------- - Issue #29392: Prevent crash when passing invalid arguments into msvcrt module. +- Issue #25778: winreg does not truncate string correctly (Patch by Eryk Sun) + +- Issue #28896: Deprecate WindowsRegistryFinder and disable it by default. + C API ----- @@ -65,11 +165,3207 @@ C API Py_BuildValue() were not available in limited API of version < 3.3 when PY_SSIZE_T_CLEAN is defined. +- Issue #29058: All stable API extensions added after Python 3.2 are now + available only when Py_LIMITED_API is set to the PY_VERSION_HEX value of + the minimum Python version supporting this API. + Documentation ------------- - Issue #29349: Fix Python 2 syntax in code for building the documentation. +Tests +----- + +- Issue #28950: Disallow -j0 to be combined with -T/-l in regrtest + command line arguments. + +- Issue #28683: Fix the tests that bind() a unix socket and raise + PermissionError on Android for a non-root user. + +- Issue #26939: Add the support.setswitchinterval() function to fix + test_functools hanging on the Android armv7 qemu emulator. + +Build +----- + +- Issue #26851: Set Android compilation and link flags. + +- Issue #28768: Fix implicit declaration of function _setmode. Patch by + Masayuki Yamamoto + +- Issue #29080: Removes hard dependency on hg.exe from PCBuild/build.bat + +- Issue #23903: Added missed names to PC/python3.def. + +- Issue #28762: lockf() is available on Android API level 24, but the F_LOCK + macro is not defined in android-ndk-r13. + +- Issue #28538: Fix the compilation error that occurs because if_nameindex() is + available on Android API level 24, but the if_nameindex structure is not + defined. + +- Issue #20211: Do not add the directory for installing C header files and the + directory for installing object code libraries to the cross compilation + search paths. Original patch by Thomas Petazzoni. + +- Issue #28849: Do not define sys.implementation._multiarch on Android. + + +What's New in Python 3.6.0? +=========================== + +*Release date: 2016-12-23* + +- No changes since release candidate 2 + + +What's New in Python 3.6.0 release candidate 2? +=============================================== + +*Release date: 2016-12-16* + +Core and Builtins +----------------- + +- Issue #28147: Fix a memory leak in split-table dictionaries: setattr() + must not convert combined table into split table. Patch written by INADA + Naoki. + +- Issue #28990: Fix asyncio SSL hanging if connection is closed before + handshake is completed. (Patch by HoHo-Ho) + +Tools/Demos +----------- + +- Issue #28770: Fix python-gdb.py for fastcalls. + +Windows +------- + +- Issue #28896: Deprecate WindowsRegistryFinder. + +Build +----- + +- Issue #28898: Prevent gdb build errors due to HAVE_LONG_LONG redefinition. + + +What's New in Python 3.6.0 release candidate 1? +=============================================== + +*Release date: 2016-12-06* + +Core and Builtins +----------------- + +- Issue #23722: Rather than silently producing a class that doesn't support + zero-argument ``super()`` in methods, failing to pass the new + ``__classcell__`` namespace entry up to ``type.__new__`` now results in a + ``DeprecationWarning`` and a class that supports zero-argument ``super()``. + +- Issue #28797: Modifying the class __dict__ inside the __set_name__ method of + a descriptor that is used inside that class no longer prevents calling the + __set_name__ method of other descriptors. + +- Issue #28782: Fix a bug in the implementation ``yield from`` when checking + if the next instruction is YIELD_FROM. Regression introduced by WORDCODE + (issue #26647). + +Library +------- + +- Issue #27030: Unknown escapes in re.sub() replacement template are allowed + again. But they still are deprecated and will be disabled in 3.7. + +- Issue #28835: Fix a regression introduced in warnings.catch_warnings(): + call warnings.showwarning() if it was overriden inside the context manager. + +- Issue #27172: To assist with upgrades from 2.7, the previously documented + deprecation of ``inspect.getfullargspec()`` has been reversed. This decision + may be revisited again after the Python 2.7 branch is no longer officially + supported. + +- Issue #26273: Add new :data:`socket.TCP_CONGESTION` (Linux 2.6.13) and + :data:`socket.TCP_USER_TIMEOUT` (Linux 2.6.37) constants. Patch written by + Omar Sandoval. + +- Issue #24142: Reading a corrupt config file left configparser in an + invalid state. Original patch by Florian Höch. + +- Issue #28843: Fix asyncio C Task to handle exceptions __traceback__. + +C API +----- + +- Issue #28808: PyUnicode_CompareWithASCIIString() now never raises exceptions. + +Documentation +------------- + +- Issue #23722: The data model reference and the porting section in the What's + New guide now cover the additional ``__classcell__`` handling needed for + custom metaclasses to fully support PEP 487 and zero-argument ``super()``. + +Tools/Demos +----------- + +- Issue #28023: Fix python-gdb.py didn't support new dict implementation. + + +What's New in Python 3.6.0 beta 4? +================================== + +*Release date: 2016-11-21* + +Core and Builtins +----------------- + +- Issue #28532: Show sys.version when -V option is supplied twice. + +- Issue #27100: The with-statement now checks for __enter__ before it + checks for __exit__. This gives less confusing error messages when + both methods are missing. Patch by Jonathan Ellington. + +- Issue #28746: Fix the set_inheritable() file descriptor method on platforms + that do not have the ioctl FIOCLEX and FIONCLEX commands. + +- Issue #26920: Fix not getting the locale's charset upon initializing the + interpreter, on platforms that do not have langinfo. + +- Issue #28648: Fixed crash in Py_DecodeLocale() in debug build on Mac OS X + when decode astral characters. Patch by Xiang Zhang. + +- Issue #19398: Extra slash no longer added to sys.path components in case of + empty compile-time PYTHONPATH components. + +- Issue #28665: Improve speed of the STORE_DEREF opcode by 40%. + +- Issue #28583: PyDict_SetDefault didn't combine split table when needed. + Patch by Xiang Zhang. + +- Issue #27243: Change PendingDeprecationWarning -> DeprecationWarning. + As it was agreed in the issue, __aiter__ returning an awaitable + should result in PendingDeprecationWarning in 3.5 and in + DeprecationWarning in 3.6. + +- Issue #26182: Fix a refleak in code that raises DeprecationWarning. + +- Issue #28721: Fix asynchronous generators aclose() and athrow() to + handle StopAsyncIteration propagation properly. + +Library +------- + +- Issue #28752: Restored the __reduce__() methods of datetime objects. + +- Issue #28727: Regular expression patterns, _sre.SRE_Pattern objects created + by re.compile(), become comparable (only x==y and x!=y operators). This + change should fix the issue #18383: don't duplicate warning filters when the + warnings module is reloaded (thing usually only done in unit tests). + +- Issue #20572: The subprocess.Popen.wait method's undocumented + endtime parameter now raises a DeprecationWarning. + +- Issue #25659: In ctypes, prevent a crash calling the from_buffer() and + from_buffer_copy() methods on abstract classes like Array. + +- Issue #19717: Makes Path.resolve() succeed on paths that do not exist. + Patch by Vajrasky Kok + +- Issue #28563: Fixed possible DoS and arbitrary code execution when handle + plural form selections in the gettext module. The expression parser now + supports exact syntax supported by GNU gettext. + +- Issue #28387: Fixed possible crash in _io.TextIOWrapper deallocator when + the garbage collector is invoked in other thread. Based on patch by + Sebastian Cufre. + +- Issue #28600: Optimize loop.call_soon. + +- Issue #28613: Fix get_event_loop() return the current loop if + called from coroutines/callbacks. + +- Issue #28634: Fix asyncio.isfuture() to support unittest.Mock. + +- Issue #26081: Fix refleak in _asyncio.Future.__iter__().throw. + +- Issue #28639: Fix inspect.isawaitable to always return bool + Patch by Justin Mayfield. + +- Issue #28652: Make loop methods reject socket kinds they do not support. + +- Issue #28653: Fix a refleak in functools.lru_cache. + +- Issue #28703: Fix asyncio.iscoroutinefunction to handle Mock objects. + +- Issue #28704: Fix create_unix_server to support Path-like objects + (PEP 519). + +- Issue #28720: Add collections.abc.AsyncGenerator. + +Documentation +------------- + +- Issue #28513: Documented command-line interface of zipfile. + +Tests +----- + +- Issue #28666: Now test.support.rmtree is able to remove unwritable or + unreadable directories. + +- Issue #23839: Various caches now are cleared before running every test file. + +Build +----- + +- Issue #10656: Fix out-of-tree building on AIX. Patch by Tristan Carel and + Michael Haubenwallner. + +- Issue #26359: Rename --with-optimiations to --enable-optimizations. + +- Issue #28676: Prevent missing 'getentropy' declaration warning on macOS. + Patch by Gareth Rees. + + +What's New in Python 3.6.0 beta 3? +================================== + +*Release date: 2016-10-31* + +Core and Builtins +----------------- + +- Issue #28128: Deprecation warning for invalid str and byte escape + sequences now prints better information about where the error + occurs. Patch by Serhiy Storchaka and Eric Smith. + +- Issue #28509: dict.update() no longer allocate unnecessary large memory. + +- Issue #28426: Fixed potential crash in PyUnicode_AsDecodedObject() in debug + build. + +- Issue #28517: Fixed of-by-one error in the peephole optimizer that caused + keeping unreachable code. + +- Issue #28214: Improved exception reporting for problematic __set_name__ + attributes. + +- Issue #23782: Fixed possible memory leak in _PyTraceback_Add() and exception + loss in PyTraceBack_Here(). + +- Issue #28471: Fix "Python memory allocator called without holding the GIL" + crash in socket.setblocking. + +Library +------- + +- Issue #27517: LZMA compressor and decompressor no longer raise exceptions if + given empty data twice. Patch by Benjamin Fogle. + +- Issue #28549: Fixed segfault in curses's addch() with ncurses6. + +- Issue #28449: tarfile.open() with mode "r" or "r:" now tries to open a tar + file with compression before trying to open it without compression. Otherwise + it had 50% chance failed with ignore_zeros=True. + +- Issue #23262: The webbrowser module now supports Firefox 36+ and derived + browsers. Based on patch by Oleg Broytman. + +- Issue #27939: Fixed bugs in tkinter.ttk.LabeledScale and tkinter.Scale caused + by representing the scale as float value internally in Tk. tkinter.IntVar + now works if float value is set to underlying Tk variable. + +- Issue #18844: The various ways of specifying weights for random.choices() + now produce the same result sequences. + +- Issue #28255: calendar.TextCalendar().prmonth() no longer prints a space + at the start of new line after printing a month's calendar. Patch by + Xiang Zhang. + +- Issue #20491: The textwrap.TextWrapper class now honors non-breaking spaces. + Based on patch by Kaarle Ritvanen. + +- Issue #28353: os.fwalk() no longer fails on broken links. + +- Issue #28430: Fix iterator of C implemented asyncio.Future doesn't accept + non-None value is passed to it.send(val). + +- Issue #27025: Generated names for Tkinter widgets now start by the "!" prefix + for readability (was "`"). + +- Issue #25464: Fixed HList.header_exists() in tkinter.tix module by addin + a workaround to Tix library bug. + +- Issue #28488: shutil.make_archive() no longer adds entry "./" to ZIP archive. + +- Issue #25953: re.sub() now raises an error for invalid numerical group + reference in replacement template even if the pattern is not found in + the string. Error message for invalid group reference now includes the + group index and the position of the reference. + Based on patch by SilentGhost. + +- Issue #18219: Optimize csv.DictWriter for large number of columns. + Patch by Mariatta Wijaya. + +- Issue #28448: Fix C implemented asyncio.Future didn't work on Windows. + +- Issue #28480: Fix error building socket module when multithreading is + disabled. + +- Issue #24452: Make webbrowser support Chrome on Mac OS X. + +- Issue #20766: Fix references leaked by pdb in the handling of SIGINT + handlers. + +- Issue #28492: Fix how StopIteration exception is raised in _asyncio.Future. + +- Issue #28500: Fix asyncio to handle async gens GC from another thread. + +- Issue #26923: Fix asyncio.Gather to refuse being cancelled once all + children are done. + Patch by Johannes Ebke. + +- Issue #26796: Don't configure the number of workers for default + threadpool executor. + Initial patch by Hans Lawrenz. + +- Issue #28544: Implement asyncio.Task in C. + +Windows +------- + +- Issue #28522: Fixes mishandled buffer reallocation in getpathp.c + +Build +----- + +- Issue #28444: Fix missing extensions modules when cross compiling. + +- Issue #28208: Update Windows build and OS X installers to use SQLite 3.14.2. + +- Issue #28248: Update Windows build and OS X installers to use OpenSSL 1.0.2j. + +Tests +----- + +- Issue #26944: Fix test_posix for Android where 'id -G' is entirely wrong or + missing the effective gid. + +- Issue #28409: regrtest: fix the parser of command line arguments. + + +What's New in Python 3.6.0 beta 2? +================================== + +*Release date: 2016-10-10* + +Core and Builtins +----------------- + +- Issue #28183: Optimize and cleanup dict iteration. + +- Issue #26081: Added C implementation of asyncio.Future. + Original patch by Yury Selivanov. + +- Issue #28379: Added sanity checks and tests for PyUnicode_CopyCharacters(). + Patch by Xiang Zhang. + +- Issue #28376: The type of long range iterator is now registered as Iterator. + Patch by Oren Milman. + +- Issue #28376: Creating instances of range_iterator by calling range_iterator + type now is deprecated. Patch by Oren Milman. + +- Issue #28376: The constructor of range_iterator now checks that step is not 0. + Patch by Oren Milman. + +- Issue #26906: Resolving special methods of uninitialized type now causes + implicit initialization of the type instead of a fail. + +- Issue #18287: PyType_Ready() now checks that tp_name is not NULL. + Original patch by Niklas Koep. + +- Issue #24098: Fixed possible crash when AST is changed in process of + compiling it. + +- Issue #28201: Dict reduces possibility of 2nd conflict in hash table when + hashes have same lower bits. + +- Issue #28350: String constants with null character no longer interned. + +- Issue #26617: Fix crash when GC runs during weakref callbacks. + +- Issue #27942: String constants now interned recursively in tuples and frozensets. + +- Issue #21578: Fixed misleading error message when ImportError called with + invalid keyword args. + +- Issue #28203: Fix incorrect type in complex(1.0, {2:3}) error message. + Patch by Soumya Sharma. + +- Issue #28086: Single var-positional argument of tuple subtype was passed + unscathed to the C-defined function. Now it is converted to exact tuple. + +- Issue #28214: Now __set_name__ is looked up on the class instead of the + instance. + +- Issue #27955: Fallback on reading /dev/urandom device when the getrandom() + syscall fails with EPERM, for example when blocked by SECCOMP. + +- Issue #28192: Don't import readline in isolated mode. + +- Upgrade internal unicode databases to Unicode version 9.0.0. + +- Issue #28131: Fix a regression in zipimport's compile_source(). zipimport + should use the same optimization level as the interpreter. + +- Issue #28126: Replace Py_MEMCPY with memcpy(). Visual Studio can properly + optimize memcpy(). + +- Issue #28120: Fix dict.pop() for splitted dictionary when trying to remove a + "pending key" (Not yet inserted in split-table). Patch by Xiang Zhang. + +- Issue #26182: Raise DeprecationWarning when async and await keywords are + used as variable/attribute/class/function name. + +Library +------- + +- Issue #27998: Fixed bytes path support in os.scandir() on Windows. + Patch by Eryk Sun. + +- Issue #28317: The disassembler now decodes FORMAT_VALUE argument. + +- Issue #26293: Fixed writing ZIP files that starts not from the start of the + file. Offsets in ZIP file now are relative to the start of the archive in + conforming to the specification. + +- Issue #28380: unittest.mock Mock autospec functions now properly support + assert_called, assert_not_called, and assert_called_once. + +- Issue #27181 remove statistics.geometric_mean and defer until 3.7. + +- Issue #28229: lzma module now supports pathlib. + +- Issue #28321: Fixed writing non-BMP characters with binary format in plistlib. + +- Issue #28225: bz2 module now supports pathlib. Initial patch by Ethan Furman. + +- Issue #28227: gzip now supports pathlib. Patch by Ethan Furman. + +- Issue #27358: Optimized merging var-keyword arguments and improved error + message when passing a non-mapping as a var-keyword argument. + +- Issue #28257: Improved error message when passing a non-iterable as + a var-positional argument. Added opcode BUILD_TUPLE_UNPACK_WITH_CALL. + +- Issue #28322: Fixed possible crashes when unpickle itertools objects from + incorrect pickle data. Based on patch by John Leitch. + +- Issue #28228: imghdr now supports pathlib. + +- Issue #28226: compileall now supports pathlib. + +- Issue #28314: Fix function declaration (C flags) for the getiterator() method + of xml.etree.ElementTree.Element. + +- Issue #28148: Stop using localtime() and gmtime() in the time + module. + + Introduced platform independent _PyTime_localtime API that is + similar to POSIX localtime_r, but available on all platforms. Patch + by Ed Schouten. + +- Issue #28253: Fixed calendar functions for extreme months: 0001-01 + and 9999-12. + + Methods itermonthdays() and itermonthdays2() are reimplemented so + that they don't call itermonthdates() which can cause datetime.date + under/overflow. + +- Issue #28275: Fixed possible use after free in the decompress() + methods of the LZMADecompressor and BZ2Decompressor classes. + Original patch by John Leitch. + +- Issue #27897: Fixed possible crash in sqlite3.Connection.create_collation() + if pass invalid string-like object as a name. Patch by Xiang Zhang. + +- Issue #18844: random.choices() now has k as a keyword-only argument + to improve the readability of common cases and come into line + with the signature used in other languages. + +- Issue #18893: Fix invalid exception handling in Lib/ctypes/macholib/dyld.py. + Patch by Madison May. + +- Issue #27611: Fixed support of default root window in the tkinter.tix module. + Added the master parameter in the DisplayStyle constructor. + +- Issue #27348: In the traceback module, restore the formatting of exception + messages like "Exception: None". This fixes a regression introduced in + 3.5a2. + +- Issue #25651: Allow falsy values to be used for msg parameter of subTest(). + +- Issue #27778: Fix a memory leak in os.getrandom() when the getrandom() is + interrupted by a signal and a signal handler raises a Python exception. + +- Issue #28200: Fix memory leak on Windows in the os module (fix + path_converter() function). + +- Issue #25400: RobotFileParser now correctly returns default values for + crawl_delay and request_rate. Initial patch by Peter Wirtz. + +- Issue #27932: Prevent memory leak in win32_ver(). + +- Fix UnboundLocalError in socket._sendfile_use_sendfile. + +- Issue #28075: Check for ERROR_ACCESS_DENIED in Windows implementation of + os.stat(). Patch by Eryk Sun. + +- Issue #22493: Warning message emitted by using inline flags in the middle of + regular expression now contains a (truncated) regex pattern. + Patch by Tim Graham. + +- Issue #25270: Prevent codecs.escape_encode() from raising SystemError when + an empty bytestring is passed. + +- Issue #28181: Get antigravity over HTTPS. Patch by Kaartic Sivaraam. + +- Issue #25895: Enable WebSocket URL schemes in urllib.parse.urljoin. + Patch by Gergely Imreh and Markus Holtermann. + +- Issue #28114: Fix a crash in parse_envlist() when env contains byte strings. + Patch by Eryk Sun. + +- Issue #27599: Fixed buffer overrun in binascii.b2a_qp() and binascii.a2b_qp(). + +- Issue #27906: Fix socket accept exhaustion during high TCP traffic. + Patch by Kevin Conway. + +- Issue #28174: Handle when SO_REUSEPORT isn't properly supported. + Patch by Seth Michael Larson. + +- Issue #26654: Inspect functools.partial in asyncio.Handle.__repr__. + Patch by iceboy. + +- Issue #26909: Fix slow pipes IO in asyncio. + Patch by INADA Naoki. + +- Issue #28176: Fix callbacks race in asyncio.SelectorLoop.sock_connect. + +- Issue #27759: Fix selectors incorrectly retain invalid file descriptors. + Patch by Mark Williams. + +- Issue #28368: Refuse monitoring processes if the child watcher has no + loop attached. + Patch by Vincent Michel. + +- Issue #28369: Raise RuntimeError when transport's FD is used with + add_reader, add_writer, etc. + +- Issue #28370: Speedup asyncio.StreamReader.readexactly. + Patch by Коренберг Марк. + +- Issue #28371: Deprecate passing asyncio.Handles to run_in_executor. + +- Issue #28372: Fix asyncio to support formatting of non-python coroutines. + +- Issue #28399: Remove UNIX socket from FS before binding. + Patch by Коренберг Марк. + +- Issue #27972: Prohibit Tasks to await on themselves. + +Windows +------- + +- Issue #28402: Adds signed catalog files for stdlib on Windows. + +- Issue #28333: Enables Unicode for ps1/ps2 and input() prompts. (Patch by + Eryk Sun) + +- Issue #28251: Improvements to help manuals on Windows. + +- Issue #28110: launcher.msi has different product codes between 32-bit and + 64-bit + +- Issue #28161: Opening CON for write access fails + +- Issue #28162: WindowsConsoleIO readall() fails if first line starts with + Ctrl+Z + +- Issue #28163: WindowsConsoleIO fileno() passes wrong flags to + _open_osfhandle + +- Issue #28164: _PyIO_get_console_type fails for various paths + +- Issue #28137: Renames Windows path file to ._pth + +- Issue #28138: Windows ._pth file should allow import site + +C API +----- + +- Issue #28426: Deprecated undocumented functions PyUnicode_AsEncodedObject(), + PyUnicode_AsDecodedObject(), PyUnicode_AsDecodedUnicode() and + PyUnicode_AsEncodedUnicode(). + +Build +----- + +- Issue #28258: Fixed build with Estonian locale (python-config and distclean + targets in Makefile). Patch by Arfrever Frehtes Taifersar Arahesis. + +- Issue #26661: setup.py now detects system libffi with multiarch wrapper. + +- Issue #15819: Remove redundant include search directory option for building + outside the source tree. + +Tests +----- + +- Issue #28217: Adds _testconsole module to test console input. + + +What's New in Python 3.6.0 beta 1? +================================== + +*Release date: 2016-09-12* + +Core and Builtins +----------------- + +- Issue #23722: The __class__ cell used by zero-argument super() is now + initialized from type.__new__ rather than __build_class__, so class methods + relying on that will now work correctly when called from metaclass methods + during class creation. Patch by Martin Teichmann. + +- Issue #25221: Fix corrupted result from PyLong_FromLong(0) when Python + is compiled with NSMALLPOSINTS = 0. + +- Issue #27080: Implement formatting support for PEP 515. Initial patch + by Chris Angelico. + +- Issue #27199: In tarfile, expose copyfileobj bufsize to improve throughput. + Patch by Jason Fried. + +- Issue #27948: In f-strings, only allow backslashes inside the braces + (where the expressions are). This is a breaking change from the 3.6 + alpha releases, where backslashes are allowed anywhere in an + f-string. Also, require that expressions inside f-strings be + enclosed within literal braces, and not escapes like + f'\x7b"hi"\x7d'. + +- Issue #28046: Remove platform-specific directories from sys.path. + +- Issue #28071: Add early-out for differencing from an empty set. + +- Issue #25758: Prevents zipimport from unnecessarily encoding a filename + (patch by Eryk Sun) + +- Issue #25856: The __module__ attribute of extension classes and functions + now is interned. This leads to more compact pickle data with protocol 4. + +- Issue #27213: Rework CALL_FUNCTION* opcodes to produce shorter and more + efficient bytecode. Patch by Demur Rumed, design by Serhiy Storchaka, + reviewed by Serhiy Storchaka and Victor Stinner. + +- Issue #26331: Implement tokenizing support for PEP 515. Patch by Georg Brandl. + +- Issue #27999: Make "global after use" a SyntaxError, and ditto for nonlocal. + Patch by Ivan Levkivskyi. + +- Issue #28003: Implement PEP 525 -- Asynchronous Generators. + +- Issue #27985: Implement PEP 526 -- Syntax for Variable Annotations. + Patch by Ivan Levkivskyi. + +- Issue #26058: Add a new private version to the builtin dict type, incremented + at each dictionary creation and at each dictionary change. Implementation of + the PEP 509. + +- Issue #27364: A backslash-character pair that is not a valid escape sequence + now generates a DeprecationWarning. Patch by Emanuel Barry. + +- Issue #27350: `dict` implementation is changed like PyPy. It is more compact + and preserves insertion order. + (Concept developed by Raymond Hettinger and patch by Inada Naoki.) + +- Issue #27911: Remove unnecessary error checks in + ``exec_builtin_or_dynamic()``. + +- Issue #27078: Added BUILD_STRING opcode. Optimized f-strings evaluation. + +- Issue #17884: Python now requires systems with inttypes.h and stdint.h + +- Issue #27961: Require platforms to support ``long long``. Python hasn't + compiled without ``long long`` for years, so this is basically a formality. + +- Issue #27355: Removed support for Windows CE. It was never finished, + and Windows CE is no longer a relevant platform for Python. + +- Implement PEP 523. + +- Issue #27870: A left shift of zero by a large integer no longer attempts + to allocate large amounts of memory. + +- Issue #25402: In int-to-decimal-string conversion, improve the estimate + of the intermediate memory required, and remove an unnecessarily strict + overflow check. Patch by Serhiy Storchaka. + +- Issue #27214: In long_invert, be more careful about modifying object + returned by long_add, and remove an unnecessary check for small longs. + Thanks Oren Milman for analysis and patch. + +- Issue #27506: Support passing the bytes/bytearray.translate() "delete" + argument by keyword. + +- Issue #27812: Properly clear out a generator's frame's backreference to the + generator to prevent crashes in frame.clear(). + +- Issue #27811: Fix a crash when a coroutine that has not been awaited is + finalized with warnings-as-errors enabled. + +- Issue #27587: Fix another issue found by PVS-Studio: Null pointer check + after use of 'def' in _PyState_AddModule(). + Initial patch by Christian Heimes. + +- Issue #27792: The modulo operation applied to ``bool`` and other + ``int`` subclasses now always returns an ``int``. Previously + the return type depended on the input values. Patch by Xiang Zhang. + +- Issue #26984: int() now always returns an instance of exact int. + +- Issue #25604: Fix a minor bug in integer true division; this bug could + potentially have caused off-by-one-ulp results on platforms with + unreliable ldexp implementations. + +- Issue #24254: Make class definition namespace ordered by default. + +- Issue #27662: Fix an overflow check in ``List_New``: the original code was + checking against ``Py_SIZE_MAX`` instead of the correct upper bound of + ``Py_SSIZE_T_MAX``. Patch by Xiang Zhang. + +- Issue #27782: Multi-phase extension module import now correctly allows the + ``m_methods`` field to be used to add module level functions to instances + of non-module types returned from ``Py_create_mod``. Patch by Xiang Zhang. + +- Issue #27936: The round() function accepted a second None argument + for some types but not for others. Fixed the inconsistency by + accepting None for all numeric types. + +- Issue #27487: Warn if a submodule argument to "python -m" or + runpy.run_module() is found in sys.modules after parent packages are + imported, but before the submodule is executed. + +- Issue #27157: Make only type() itself accept the one-argument form. + Patch by Eryk Sun and Emanuel Barry. + +- Issue #27558: Fix a SystemError in the implementation of "raise" statement. + In a brand new thread, raise a RuntimeError since there is no active + exception to reraise. Patch written by Xiang Zhang. + +- Issue #28008: Implement PEP 530 -- asynchronous comprehensions. + +- Issue #27942: Fix memory leak in codeobject.c + +Library +------- + +- Issue #28732: Fix crash in os.spawnv() with no elements in args + +- Issue #28485: Always raise ValueError for negative + compileall.compile_dir(workers=...) parameter, even when multithreading is + unavailable. + +- Issue #28037: Use sqlite3_get_autocommit() instead of setting + Connection->inTransaction manually. + +- Issue #25283: Attributes tm_gmtoff and tm_zone are now available on + all platforms in the return values of time.localtime() and + time.gmtime(). + +- Issue #24454: Regular expression match object groups are now + accessible using __getitem__. "mo[x]" is equivalent to + "mo.group(x)". + +- Issue #10740: sqlite3 no longer implicitly commit an open transaction + before DDL statements. + +- Issue #17941: Add a *module* parameter to collections.namedtuple(). + +- Issue #22493: Inline flags now should be used only at the start of the + regular expression. Deprecation warning is emitted if uses them in the + middle of the regular expression. + +- Issue #26885: xmlrpc now supports unmarshalling additional data types used + by Apache XML-RPC implementation for numerics and None. + +- Issue #28070: Fixed parsing inline verbose flag in regular expressions. + +- Issue #19500: Add client-side SSL session resumption to the ssl module. + +- Issue #28022: Deprecate ssl-related arguments in favor of SSLContext. The + deprecation include manual creation of SSLSocket and certfile/keyfile + (or similar) in ftplib, httplib, imaplib, smtplib, poplib and urllib. + +- Issue #28043: SSLContext has improved default settings: OP_NO_SSLv2, + OP_NO_SSLv3, OP_NO_COMPRESSION, OP_CIPHER_SERVER_PREFERENCE, + OP_SINGLE_DH_USE, OP_SINGLE_ECDH_USE and HIGH ciphers without MD5. + +- Issue #24693: Changed some RuntimeError's in the zipfile module to more + appropriate types. Improved some error messages and debugging output. + +- Issue #17909: ``json.load`` and ``json.loads`` now support binary input + encoded as UTF-8, UTF-16 or UTF-32. Patch by Serhiy Storchaka. + +- Issue #27137: the pure Python fallback implementation of ``functools.partial`` + now matches the behaviour of its accelerated C counterpart for subclassing, + pickling and text representation purposes. Patch by Emanuel Barry and + Serhiy Storchaka. + +- Fix possible integer overflows and crashes in the mmap module with unusual + usage patterns. + +- Issue #1703178: Fix the ability to pass the --link-objects option to the + distutils build_ext command. + +- Issue #28019: itertools.count() no longer rounds non-integer step in range + between 1.0 and 2.0 to 1. + +- Issue #18401: Pdb now supports the 'readrc' keyword argument to control + whether .pdbrc files should be read. Patch by Martin Matusiak and + Sam Kimbrel. + +- Issue #25969: Update the lib2to3 grammar to handle the unpacking + generalizations added in 3.5. + +- Issue #14977: mailcap now respects the order of the lines in the mailcap + files ("first match"), as required by RFC 1542. Patch by Michael Lazar. + +- Issue #28082: Convert re flag constants to IntFlag. + +- Issue #28025: Convert all ssl module constants to IntEnum and IntFlags. + SSLContext properties now return flags and enums. + +- Issue #23591: Add Flag, IntFlag, and auto() to enum module. + +- Issue #433028: Added support of modifier spans in regular expressions. + +- Issue #24594: Validates persist parameter when opening MSI database + +- Issue #17582: xml.etree.ElementTree nows preserves whitespaces in attributes + (Patch by Duane Griffin. Reviewed and approved by Stefan Behnel.) + +- Issue #28047: Fixed calculation of line length used for the base64 CTE + in the new email policies. + +- Issue #27576: Fix call order in OrderedDict.__init__(). + +- email.generator.DecodedGenerator now supports the policy keyword. + +- Issue #28027: Remove undocumented modules from ``Lib/plat-*``: IN, CDROM, + DLFCN, TYPES, CDIO, and STROPTS. + +- Issue #27445: Don't pass str(_charset) to MIMEText.set_payload(). + Patch by Claude Paroz. + +- Issue #24277: The new email API is no longer provisional, and the docs + have been reorganized and rewritten to emphasize the new API. + +- Issue #22450: urllib now includes an "Accept: */*" header among the + default headers. This makes the results of REST API requests more + consistent and predictable especially when proxy servers are involved. + +- lib2to3.pgen3.driver.load_grammar() now creates a stable cache file + between runs given the same Grammar.txt input regardless of the hash + randomization setting. + +- Issue #28005: Allow ImportErrors in encoding implementation to propagate. + +- Issue #26667: Support path-like objects in importlib.util. + +- Issue #27570: Avoid zero-length memcpy() etc calls with null source + pointers in the "ctypes" and "array" modules. + +- Issue #22233: Break email header lines *only* on the RFC specified CR and LF + characters, not on arbitrary unicode line breaks. This also fixes a bug in + HTTP header parsing. + +- Issue 27331: The email.mime classes now all accept an optional policy keyword. + +- Issue 27988: Fix email iter_attachments incorrect mutation of payload list. + +- Issue #16113: Add SHA-3 and SHAKE support to hashlib module. + +- Eliminate a tautological-pointer-compare warning in _scproxy.c. + +- Issue #27776: The :func:`os.urandom` function does now block on Linux 3.17 + and newer until the system urandom entropy pool is initialized to increase + the security. This change is part of the :pep:`524`. + +- Issue #27778: Expose the Linux ``getrandom()`` syscall as a new + :func:`os.getrandom` function. This change is part of the :pep:`524`. + +- Issue #27691: Fix ssl module's parsing of GEN_RID subject alternative name + fields in X.509 certs. + +- Issue #18844: Add random.choices(). + +- Issue #25761: Improved error reporting about truncated pickle data in + C implementation of unpickler. UnpicklingError is now raised instead of + AttributeError and ValueError in some cases. + +- Issue #26798: Add BLAKE2 (blake2b and blake2s) to hashlib. + +- Issue #26032: Optimized globbing in pathlib by using os.scandir(); it is now + about 1.5--4 times faster. + +- Issue #25596: Optimized glob() and iglob() functions in the + glob module; they are now about 3--6 times faster. + +- Issue #27928: Add scrypt (password-based key derivation function) to + hashlib module (requires OpenSSL 1.1.0). + +- Issue #27850: Remove 3DES from ssl module's default cipher list to counter + measure sweet32 attack (CVE-2016-2183). + +- Issue #27766: Add ChaCha20 Poly1305 to ssl module's default ciper list. + (Required OpenSSL 1.1.0 or LibreSSL). + +- Issue #25387: Check return value of winsound.MessageBeep. + +- Issue #27866: Add SSLContext.get_ciphers() method to get a list of all + enabled ciphers. + +- Issue #27744: Add AF_ALG (Linux Kernel crypto) to socket module. + +- Issue #26470: Port ssl and hashlib module to OpenSSL 1.1.0. + +- Issue #11620: Fix support for SND_MEMORY in winsound.PlaySound. Based on a + patch by Tim Lesher. + +- Issue #11734: Add support for IEEE 754 half-precision floats to the + struct module. Based on a patch by Eli Stevens. + +- Issue #27919: Deprecated ``extra_path`` distribution option in distutils + packaging. + +- Issue #23229: Add new ``cmath`` constants: ``cmath.inf`` and ``cmath.nan`` to + match ``math.inf`` and ``math.nan``, and also ``cmath.infj`` and + ``cmath.nanj`` to match the format used by complex repr. + +- Issue #27842: The csv.DictReader now returns rows of type OrderedDict. + (Contributed by Steve Holden.) + +- Remove support for passing a file descriptor to os.access. It never worked but + previously didn't raise. + +- Issue #12885: Fix error when distutils encounters symlink. + +- Issue #27881: Fixed possible bugs when setting sqlite3.Connection.isolation_level. + Based on patch by Xiang Zhang. + +- Issue #27861: Fixed a crash in sqlite3.Connection.cursor() when a factory + creates not a cursor. Patch by Xiang Zhang. + +- Issue #19884: Avoid spurious output on OS X with Gnu Readline. + +- Issue #27706: Restore deterministic behavior of random.Random().seed() + for string seeds using seeding version 1. Allows sequences of calls + to random() to exactly match those obtained in Python 2. + Patch by Nofar Schnider. + +- Issue #10513: Fix a regression in Connection.commit(). Statements should + not be reset after a commit. + +- Issue #12319: Chunked transfer encoding support added to + http.client.HTTPConnection requests. The + urllib.request.AbstractHTTPHandler class does not enforce a Content-Length + header any more. If a HTTP request has a file or iterable body, but no + Content-Length header, the library now falls back to use chunked transfer- + encoding. + +- A new version of typing.py from https://github.com/python/typing: + - Collection (only for 3.6) (Issue #27598) + - Add FrozenSet to __all__ (upstream #261) + - fix crash in _get_type_vars() (upstream #259) + - Remove the dict constraint in ForwardRef._eval_type (upstream #252) + +- Issue #27832: Make ``_normalize`` parameter to ``Fraction`` constuctor + keyword-only, so that ``Fraction(2, 3, 4)`` now raises ``TypeError``. + +- Issue #27539: Fix unnormalised ``Fraction.__pow__`` result in the case + of negative exponent and negative base. + +- Issue #21718: cursor.description is now available for queries using CTEs. + +- Issue #27819: In distutils sdists, simply produce the "gztar" (gzipped tar + format) distributions on all platforms unless "formats" is supplied. + +- Issue #2466: posixpath.ismount now correctly recognizes mount points which + the user does not have permission to access. + +- Issue #9998: On Linux, ctypes.util.find_library now looks in LD_LIBRARY_PATH + for shared libraries. + +- Issue #27573: exit message for code.interact is now configurable. + +- Issue #27930: Improved behaviour of logging.handlers.QueueListener. + Thanks to Paulo Andrade and Petr Viktorin for the analysis and patch. + +- Issue #6766: Distributed reference counting added to multiprocessing + to support nesting of shared values / proxy objects. + +- Issue #21201: Improves readability of multiprocessing error message. Thanks + to Wojciech Walczak for patch. + +- asyncio: Add set_protocol / get_protocol to Transports. + +- Issue #27456: asyncio: Set TCP_NODELAY by default. + +IDLE +---- + +- Issue #15308: Add 'interrupt execution' (^C) to Shell menu. + Patch by Roger Serwy, updated by Bayard Randel. + +- Issue #27922: Stop IDLE tests from 'flashing' gui widgets on the screen. + +- Issue #27891: Consistently group and sort imports within idlelib modules. + +- Issue #17642: add larger font sizes for classroom projection. + +- Add version to title of IDLE help window. + +- Issue #25564: In section on IDLE -- console differences, mention that + using exec means that __builtins__ is defined for each statement. + +- Issue #27821: Fix 3.6.0a3 regression that prevented custom key sets + from being selected when no custom theme was defined. + +C API +----- + +- Issue #26900: Excluded underscored names and other private API from limited API. + +- Issue #26027: Add support for path-like objects in PyUnicode_FSConverter() & + PyUnicode_FSDecoder(). + +Tests +----- + +- Issue #27427: Additional tests for the math module. Patch by Francisco Couzo. + +- Issue #27953: Skip math and cmath tests that fail on OS X 10.4 due to a + poor libm implementation of tan. + +- Issue #26040: Improve test_math and test_cmath coverage and rigour. Patch by + Jeff Allen. + +- Issue #27787: Call gc.collect() before checking each test for "dangling + threads", since the dangling threads are weak references. + +Build +----- + +- Issue #27566: Fix clean target in freeze makefile (patch by Lisa Roach) + +- Issue #27705: Update message in validate_ucrtbase.py + +- Issue #27976: Deprecate building _ctypes with the bundled copy of libffi on + non-OSX UNIX platforms. + +- Issue #27983: Cause lack of llvm-profdata tool when using clang as + required for PGO linking to be a configure time error rather than + make time when --with-optimizations is enabled. Also improve our + ability to find the llvm-profdata tool on MacOS and some Linuxes. + +- Issue #21590: Support for DTrace and SystemTap probes. + +- Issue #26307: The profile-opt build now applies PGO to the built-in modules. + +- Issue #26359: Add the --with-optimizations flag to turn on LTO and PGO build + support when available. + +- Issue #27917: Set platform triplets for Android builds. + +- Issue #25825: Update references to the $(LIBPL) installation path on AIX. + This path was changed in 3.2a4. + +- Update OS X installer to use SQLite 3.14.1 and XZ 5.2.2. + +- Issue #21122: Fix LTO builds on OS X. + +- Issue #17128: Build OS X installer with a private copy of OpenSSL. + Also provide a sample Install Certificates command script to install a + set of root certificates from the third-party certifi module. + +Tools/Demos +----------- + +- Issue #27952: Get Tools/scripts/fixcid.py working with Python 3 and the + current "re" module, avoid invalid Python backslash escapes, and fix a bug + parsing escaped C quote signs. + +Windows +------- + +- Issue #28065: Update xz dependency to 5.2.2 and build it from source. + +- Issue #25144: Ensures TargetDir is set before continuing with custom + install. + +- Issue #1602: Windows console doesn't input or print Unicode (PEP 528) + +- Issue #27781: Change file system encoding on Windows to UTF-8 (PEP 529) + +- Issue #27731: Opt-out of MAX_PATH on Windows 10 + +- Issue #6135: Adds encoding and errors parameters to subprocess. + +- Issue #27959: Adds oem encoding, alias ansi to mbcs, move aliasmbcs to + codec lookup. + +- Issue #27982: The functions of the winsound module now accept keyword + arguments. + +- Issue #20366: Build full text search support into SQLite on Windows. + +- Issue #27756: Adds new icons for Python files and processes on Windows. + Designs by Cherry Wang. + +- Issue #27883: Update sqlite to 3.14.1.0 on Windows. + + +What's New in Python 3.6.0 alpha 4? +=================================== + +*Release date: 2016-08-15* + +Core and Builtins +----------------- + +- Issue #27704: Optimized creating bytes and bytearray from byte-like objects + and iterables. Speed up to 3 times for short objects. Original patch by + Naoki Inada. + +- Issue #26823: Large sections of repeated lines in tracebacks are now + abbreviated as "[Previous line repeated {count} more times]" by the builtin + traceback rendering. Patch by Emanuel Barry. + +- Issue #27574: Decreased an overhead of parsing keyword arguments in functions + implemented with using Argument Clinic. + +- Issue #22557: Now importing already imported modules is up to 2.5 times + faster. + +- Issue #17596: Include <wincrypt.h> to help with Min GW building. + +- Issue #17599: On Windows, rename the privately defined REPARSE_DATA_BUFFER + structure to avoid conflicting with the definition from Min GW. + +- Issue #27507: Add integer overflow check in bytearray.extend(). Patch by + Xiang Zhang. + +- Issue #27581: Don't rely on wrapping for overflow check in + PySequence_Tuple(). Patch by Xiang Zhang. + +- Issue #1621: Avoid signed integer overflow in list and tuple operations. + Patch by Xiang Zhang. + +- Issue #27419: Standard __import__() no longer look up "__import__" in globals + or builtins for importing submodules or "from import". Fixed a crash if + raise a warning about unabling to resolve package from __spec__ or + __package__. + +- Issue #27083: Respect the PYTHONCASEOK environment variable under Windows. + +- Issue #27514: Make having too many statically nested blocks a SyntaxError + instead of SystemError. + +- Issue #27366: Implemented PEP 487 (Simpler customization of class creation). + Upon subclassing, the __init_subclass__ classmethod is called on the base + class. Descriptors are initialized with __set_name__ after class creation. + +Library +------- + +- Issue #26027, #27524: Add PEP 519/__fspath__() support to the os and os.path + modules. Includes code from Jelle Zijlstra. + +- Issue #27598: Add Collections to collections.abc. + Patch by Ivan Levkivskyi, docs by Neil Girdhar. + +- Issue #25958: Support "anti-registration" of special methods from + various ABCs, like __hash__, __iter__ or __len__. All these (and + several more) can be set to None in an implementation class and the + behavior will be as if the method is not defined at all. + (Previously, this mechanism existed only for __hash__, to make + mutable classes unhashable.) Code contributed by Andrew Barnert and + Ivan Levkivskyi. + +- Issue #16764: Support keyword arguments to zlib.decompress(). Patch by + Xiang Zhang. + +- Issue #27736: Prevent segfault after interpreter re-initialization due + to ref count problem introduced in code for Issue #27038 in 3.6.0a3. + Patch by Xiang Zhang. + +- Issue #25628: The *verbose* and *rename* parameters for + collections.namedtuple are now keyword-only. + +- Issue #12345: Add mathematical constant tau to math and cmath. See also + PEP 628. + +- Issue #26823: traceback.StackSummary.format now abbreviates large sections of + repeated lines as "[Previous line repeated {count} more times]" (this change + then further affects other traceback display operations in the module). Patch + by Emanuel Barry. + +- Issue #27664: Add to concurrent.futures.thread.ThreadPoolExecutor() + the ability to specify a thread name prefix. + +- Issue #27181: Add geometric_mean and harmonic_mean to statistics module. + +- Issue #27573: code.interact now prints an message when exiting. + +- Issue #6422: Add autorange method to timeit.Timer objects. + +- Issue #27773: Correct some memory management errors server_hostname in + _ssl.wrap_socket(). + +- Issue #26750: unittest.mock.create_autospec() now works properly for + subclasses of property() and other data descriptors. Removes the never + publicly used, never documented unittest.mock.DescriptorTypes tuple. + +- Issue #26754: Undocumented support of general bytes-like objects + as path in compile() and similar functions is now deprecated. + +- Issue #26800: Undocumented support of general bytes-like objects + as paths in os functions is now deprecated. + +- Issue #26981: Add _order_ compatibility shim to enum.Enum for + Python 2/3 code bases. + +- Issue #27661: Added tzinfo keyword argument to datetime.combine. + +- In the curses module, raise an error if window.getstr() or window.instr() is + passed a negative value. + +- Issue #27783: Fix possible usage of uninitialized memory in + operator.methodcaller. + +- Issue #27774: Fix possible Py_DECREF on unowned object in _sre. + +- Issue #27760: Fix possible integer overflow in binascii.b2a_qp. + +- Issue #27758: Fix possible integer overflow in the _csv module for large + record lengths. + +- Issue #27568: Prevent HTTPoxy attack (CVE-2016-1000110). Ignore the + HTTP_PROXY variable when REQUEST_METHOD environment is set, which indicates + that the script is in CGI mode. + +- Issue #7063: Remove dead code from the "array" module's slice handling. + Patch by Chuck. + +- Issue #27656: Do not assume sched.h defines any SCHED_* constants. + +- Issue #27130: In the "zlib" module, fix handling of large buffers + (typically 4 GiB) when compressing and decompressing. Previously, inputs + were limited to 4 GiB, and compression and decompression operations did not + properly handle results of 4 GiB. + +- Issue #24773: Implemented PEP 495 (Local Time Disambiguation). + +- Expose the EPOLLEXCLUSIVE constant (when it is defined) in the select module. + +- Issue #27567: Expose the EPOLLRDHUP and POLLRDHUP constants in the select + module. + +- Issue #1621: Avoid signed int negation overflow in the "audioop" module. + +- Issue #27533: Release GIL in nt._isdir + +- Issue #17711: Fixed unpickling by the persistent ID with protocol 0. + Original patch by Alexandre Vassalotti. + +- Issue #27522: Avoid an unintentional reference cycle in email.feedparser. + +- Issue #27512: Fix a segfault when os.fspath() called an __fspath__() method + that raised an exception. Patch by Xiang Zhang. + +IDLE +---- + +- Issue #27714: text_textview and test_autocomplete now pass when re-run + in the same process. This occurs when test_idle fails when run with the + -w option but without -jn. Fix warning from test_config. + +- Issue #27621: Put query response validation error messages in the query + box itself instead of in a separate massagebox. Redo tests to match. + Add Mac OSX refinements. Original patch by Mark Roseman. + +- Issue #27620: Escape key now closes Query box as cancelled. + +- Issue #27609: IDLE: tab after initial whitespace should tab, not + autocomplete. This fixes problem with writing docstrings at least + twice indented. + +- Issue #27609: Explicitly return None when there are also non-None + returns. In a few cases, reverse a condition and eliminate a return. + +- Issue #25507: IDLE no longer runs buggy code because of its tkinter imports. + Users must include the same imports required to run directly in Python. + +- Issue #27173: Add 'IDLE Modern Unix' to the built-in key sets. + Make the default key set depend on the platform. + Add tests for the changes to the config module. + +- Issue #27452: add line counter and crc to IDLE configHandler test dump. + +Tests +----- + +- Issue #25805: Skip a test in test_pkgutil as needed that doesn't work when + ``__name__ == __main__``. Patch by SilentGhost. + +- Issue #27472: Add test.support.unix_shell as the path to the default shell. + +- Issue #27369: In test_pyexpat, avoid testing an error message detail that + changed in Expat 2.2.0. + +- Issue #27594: Prevent assertion error when running test_ast with coverage + enabled: ensure code object has a valid first line number. + Patch suggested by Ivan Levkivskyi. + +Windows +------- + +- Issue #27647: Update bundled Tcl/Tk to 8.6.6. + +- Issue #27610: Adds PEP 514 metadata to Windows installer + +- Issue #27469: Adds a shell extension to the launcher so that drag and drop + works correctly. + +- Issue #27309: Enables proper Windows styles in python[w].exe manifest. + +Build +----- + +- Issue #27713: Suppress spurious build warnings when updating importlib's + bootstrap files. Patch by Xiang Zhang + +- Issue #25825: Correct the references to Modules/python.exp, which is + required on AIX. The references were accidentally changed in 3.5.0a1. + +- Issue #27453: CPP invocation in configure must use CPPFLAGS. Patch by + Chi Hsuan Yen. + +- Issue #27641: The configure script now inserts comments into the makefile + to prevent the pgen and _freeze_importlib executables from being cross- + compiled. + +- Issue #26662: Set PYTHON_FOR_GEN in configure as the Python program to be + used for file generation during the build. + +- Issue #10910: Avoid C++ compilation errors on FreeBSD and OS X. + Also update FreedBSD version checks for the original ctype UTF-8 workaround. + + +What's New in Python 3.6.0 alpha 3? +=================================== + +*Release date: 2016-07-11* + +Core and Builtins +----------------- + +- Issue #27473: Fixed possible integer overflow in bytes and bytearray + concatenations. Patch by Xiang Zhang. + +- Issue #23034: The output of a special Python build with defined COUNT_ALLOCS, + SHOW_ALLOC_COUNT or SHOW_TRACK_COUNT macros is now off by default. It can + be re-enabled using the "-X showalloccount" option. It now outputs to stderr + instead of stdout. + +- Issue #27443: __length_hint__() of bytearray iterators no longer return a + negative integer for a resized bytearray. + +- Issue #27007: The fromhex() class methods of bytes and bytearray subclasses + now return an instance of corresponding subclass. + +Library +------- + +- Issue #26844: Fix error message for imp.find_module() to refer to 'path' + instead of 'name'. Patch by Lev Maximov. + +- Issue #23804: Fix SSL zero-length recv() calls to not block and not raise + an error about unclean EOF. + +- Issue #27466: Change time format returned by http.cookie.time2netscape, + confirming the netscape cookie format and making it consistent with + documentation. + +- Issue #21708: Deprecated dbm.dumb behavior that differs from common dbm + behavior: creating a database in 'r' and 'w' modes and modifying a database + in 'r' mode. + +- Issue #26721: Change the socketserver.StreamRequestHandler.wfile attribute + to implement BufferedIOBase. In particular, the write() method no longer + does partial writes. + +- Issue #22115: Added methods trace_add, trace_remove and trace_info in the + tkinter.Variable class. They replace old methods trace_variable, trace, + trace_vdelete and trace_vinfo that use obsolete Tcl commands and might + not work in future versions of Tcl. Fixed old tracing methods: + trace_vdelete() with wrong mode no longer break tracing, trace_vinfo() now + always returns a list of pairs of strings, tracing in the "u" mode now works. + +- Issue #26243: Only the level argument to zlib.compress() is keyword argument + now. The first argument is positional-only. + +- Issue #27038: Expose the DirEntry type as os.DirEntry. Code patch by + Jelle Zijlstra. + +- Issue #27186: Update os.fspath()/PyOS_FSPath() to check the return value of + __fspath__() to be either str or bytes. + +- Issue #18726: All optional parameters of the dump(), dumps(), + load() and loads() functions and JSONEncoder and JSONDecoder class + constructors in the json module are now keyword-only. + +- Issue #27319: Methods selection_set(), selection_add(), selection_remove() + and selection_toggle() of ttk.TreeView now allow passing multiple items as + multiple arguments instead of passing them as a tuple. Deprecated + undocumented ability of calling the selection() method with arguments. + +- Issue #27079: Fixed curses.ascii functions isblank(), iscntrl() and ispunct(). + +- Issue #27294: Numerical state in the repr for Tkinter event objects is now + represented as a combination of known flags. + +- Issue #27177: Match objects in the re module now support index-like objects + as group indices. Based on patches by Jeroen Demeyer and Xiang Zhang. + +- Issue #26754: Some functions (compile() etc) accepted a filename argument + encoded as an iterable of integers. Now only strings and byte-like objects + are accepted. + +- Issue #26536: socket.ioctl now supports SIO_LOOPBACK_FAST_PATH. Patch by + Daniel Stokes. + +- Issue #27048: Prevents distutils failing on Windows when environment + variables contain non-ASCII characters + +- Issue #27330: Fixed possible leaks in the ctypes module. + +- Issue #27238: Got rid of bare excepts in the turtle module. Original patch + by Jelle Zijlstra. + +- Issue #27122: When an exception is raised within the context being managed + by a contextlib.ExitStack() and one of the exit stack generators + catches and raises it in a chain, do not re-raise the original exception + when exiting, let the new chained one through. This avoids the PEP 479 + bug described in issue25782. + +- [Security] Issue #27278: Fix os.urandom() implementation using getrandom() on + Linux. Truncate size to INT_MAX and loop until we collected enough random + bytes, instead of casting a directly Py_ssize_t to int. + +- Issue #16864: sqlite3.Cursor.lastrowid now supports REPLACE statement. + Initial patch by Alex LordThorsen. + +- Issue #26386: Fixed ttk.TreeView selection operations with item id's + containing spaces. + +- Issue #8637: Honor a pager set by the env var MANPAGER (in preference to + one set by the env var PAGER). + +- [Security] Issue #22636: Avoid shell injection problems with + ctypes.util.find_library(). + +- Issue #16182: Fix various functions in the "readline" module to use the + locale encoding, and fix get_begidx() and get_endidx() to return code point + indexes. + +- Issue #27392: Add loop.connect_accepted_socket(). + Patch by Jim Fulton. + +IDLE +---- + +- Issue #27477: IDLE search dialogs now use ttk widgets. + +- Issue #27173: Add 'IDLE Modern Unix' to the built-in key sets. + Make the default key set depend on the platform. + Add tests for the changes to the config module. + +- Issue #27452: make command line "idle-test> python test_help.py" work. + __file__ is relative when python is started in the file's directory. + +- Issue #27452: add line counter and crc to IDLE configHandler test dump. + +- Issue #27380: IDLE: add query.py with base Query dialog and ttk widgets. + Module had subclasses SectionName, ModuleName, and HelpSource, which are + used to get information from users by configdialog and file =>Load Module. + Each subclass has itw own validity checks. Using ModuleName allows users + to edit bad module names instead of starting over. + Add tests and delete the two files combined into the new one. + +- Issue #27372: Test_idle no longer changes the locale. + +- Issue #27365: Allow non-ascii chars in IDLE NEWS.txt, for contributor names. + +- Issue #27245: IDLE: Cleanly delete custom themes and key bindings. + Previously, when IDLE was started from a console or by import, a cascade + of warnings was emitted. Patch by Serhiy Storchaka. + +- Issue #24137: Run IDLE, test_idle, and htest with tkinter default root + disabled. Fix code and tests that fail with this restriction. Fix htests to + not create a second and redundant root and mainloop. + +- Issue #27310: Fix IDLE.app failure to launch on OS X due to vestigial import. + +C API +----- + +- Issue #26754: PyUnicode_FSDecoder() accepted a filename argument encoded as + an iterable of integers. Now only strings and byte-like objects are accepted. + +Build +----- + +- Issue #28066: Fix the logic that searches build directories for generated + include files when building outside the source tree. + +- Issue #27442: Expose the Android API level that python was built against, in + sysconfig.get_config_vars() as 'ANDROID_API_LEVEL'. + +- Issue #27434: The interpreter that runs the cross-build, found in PATH, must + now be of the same feature version (e.g. 3.6) as the source being built. + +- Issue #26930: Update Windows builds to use OpenSSL 1.0.2h. + +- Issue #23968: Rename the platform directory from plat-$(MACHDEP) to + plat-$(PLATFORM_TRIPLET). + Rename the config directory (LIBPL) from config-$(LDVERSION) to + config-$(LDVERSION)-$(PLATFORM_TRIPLET). + Install the platform specifc _sysconfigdata module into the platform + directory and rename it to include the ABIFLAGS. + +- Don't use largefile support for GNU/Hurd. + +Tools/Demos +----------- + +- Issue #27332: Fixed the type of the first argument of module-level functions + generated by Argument Clinic. Patch by Petr Viktorin. + +- Issue #27418: Fixed Tools/importbench/importbench.py. + +Documentation +------------- + +- Issue #19489: Moved the search box from the sidebar to the header and footer + of each page. Patch by Ammar Askar. + +- Issue #27285: Update documentation to reflect the deprecation of ``pyvenv`` + and normalize on the term "virtual environment". Patch by Steve Piercy. + +Tests +----- + +- Issue #27027: Added test.support.is_android that is True when this is an + Android build. + + +What's New in Python 3.6.0 alpha 2? +=================================== + +*Release date: 2016-06-13* + +Core and Builtins +----------------- + +- Issue #27095: Simplified MAKE_FUNCTION and removed MAKE_CLOSURE opcodes. + Patch by Demur Rumed. + +- Issue #27190: Raise NotSupportedError if sqlite3 is older than 3.3.1. + Patch by Dave Sawyer. + +- Issue #27286: Fixed compiling BUILD_MAP_UNPACK_WITH_CALL opcode. Calling + function with generalized unpacking (PEP 448) and conflicting keyword names + could cause undefined behavior. + +- Issue #27140: Added BUILD_CONST_KEY_MAP opcode. + +- Issue #27186: Add support for os.PathLike objects to open() (part of PEP 519). + +- Issue #27066: Fixed SystemError if a custom opener (for open()) returns a + negative number without setting an exception. + +- Issue #26983: float() now always return an instance of exact float. + The deprecation warning is emitted if __float__ returns an instance of + a strict subclass of float. In a future versions of Python this can + be an error. + +- Issue #27097: Python interpreter is now about 7% faster due to optimized + instruction decoding. Based on patch by Demur Rumed. + +- Issue #26647: Python interpreter now uses 16-bit wordcode instead of bytecode. + Patch by Demur Rumed. + +- Issue #23275: Allow assigning to an empty target list in round brackets: + () = iterable. + +- Issue #27243: Update the __aiter__ protocol: instead of returning + an awaitable that resolves to an asynchronous iterator, the asynchronous + iterator should be returned directly. Doing the former will trigger a + PendingDeprecationWarning. + + +Library +------- + +- Comment out socket (SO_REUSEPORT) and posix (O_SHLOCK, O_EXLOCK) constants + exposed on the API which are not implemented on GNU/Hurd. They would not + work at runtime anyway. + +- Issue #27025: Generated names for Tkinter widgets are now more meanful + and recognizirable. + +- Issue #25455: Fixed crashes in repr of recursive ElementTree.Element and + functools.partial objects. + +- Issue #27294: Improved repr for Tkinter event objects. + +- Issue #20508: Improve exception message of IPv{4,6}Network.__getitem__. + Patch by Gareth Rees. + +- [Security] Issue #26556: Update expat to 2.1.1, fixes CVE-2015-1283. + +- [Security] Fix TLS stripping vulnerability in smtplib, CVE-2016-0772. + Reported by Team Oststrom. + +- Issue #21386: Implement missing IPv4Address.is_global property. It was + documented since 07a5610bae9d. Initial patch by Roger Luethi. + +- Issue #27029: Removed deprecated support of universal newlines mode from + ZipFile.open(). + +- Issue #27030: Unknown escapes consisting of ``'\'`` and an ASCII letter in + regular expressions now are errors. The re.LOCALE flag now can be used + only with bytes patterns. + +- Issue #27186: Add os.PathLike support to DirEntry (part of PEP 519). + Initial patch by Jelle Zijlstra. + +- Issue #20900: distutils register command now decodes HTTP responses + correctly. Initial patch by ingrid. + +- Issue #27186: Add os.PathLike support to pathlib, removing its provisional + status (part of PEP 519). Initial patch by Dusty Phillips. + +- Issue #27186: Add support for os.PathLike objects to os.fsencode() and + os.fsdecode() (part of PEP 519). + +- Issue #27186: Introduce os.PathLike and os.fspath() (part of PEP 519). + +- A new version of typing.py provides several new classes and + features: @overload outside stubs, Reversible, DefaultDict, Text, + ContextManager, Type[], NewType(), TYPE_CHECKING, and numerous bug + fixes (note that some of the new features are not yet implemented in + mypy or other static analyzers). Also classes for PEP 492 + (Awaitable, AsyncIterable, AsyncIterator) have been added (in fact + they made it into 3.5.1 but were never mentioned). + +- Issue #25738: Stop http.server.BaseHTTPRequestHandler.send_error() from + sending a message body for 205 Reset Content. Also, don't send Content + header fields in responses that don't have a body. Patch by Susumu + Koshiba. + +- Issue #21313: Fix the "platform" module to tolerate when sys.version + contains truncated build information. + +- [Security] Issue #26839: On Linux, :func:`os.urandom` now calls + ``getrandom()`` with ``GRND_NONBLOCK`` to fall back on reading + ``/dev/urandom`` if the urandom entropy pool is not initialized yet. Patch + written by Colm Buckley. + +- Issue #23883: Added missing APIs to __all__ to match the documented APIs + for the following modules: cgi, mailbox, mimetypes, plistlib and smtpd. + Patches by Jacek Kołodziej. + +- Issue #27164: In the zlib module, allow decompressing raw Deflate streams + with a predefined zdict. Based on patch by Xiang Zhang. + +- Issue #24291: Fix wsgiref.simple_server.WSGIRequestHandler to completely + write data to the client. Previously it could do partial writes and + truncate data. Also, wsgiref.handler.ServerHandler can now handle stdout + doing partial writes, but this is deprecated. + +- Issue #21272: Use _sysconfigdata.py to initialize distutils.sysconfig. + +- Issue #19611: :mod:`inspect` now reports the implicit ``.0`` parameters + generated by the compiler for comprehension and generator expression scopes + as if they were positional-only parameters called ``implicit0``. + Patch by Jelle Zijlstra. + +- Issue #26809: Add ``__all__`` to :mod:`string`. Patch by Emanuel Barry. + +- Issue #26373: subprocess.Popen.communicate now correctly ignores + BrokenPipeError when the child process dies before .communicate() + is called in more/all circumstances. + +- signal, socket, and ssl module IntEnum constant name lookups now return a + consistent name for values having multiple names. Ex: signal.Signals(6) + now refers to itself as signal.SIGALRM rather than flipping between that + and signal.SIGIOT based on the interpreter's hash randomization seed. + +- Issue #27167: Clarify the subprocess.CalledProcessError error message text + when the child process died due to a signal. + +- Issue #25931: Don't define socketserver.Forking* names on platforms such + as Windows that do not support os.fork(). + +- Issue #21776: distutils.upload now correctly handles HTTPError. + Initial patch by Claudiu Popa. + +- Issue #26526: Replace custom parse tree validation in the parser + module with a simple DFA validator. + +- Issue #27114: Fix SSLContext._load_windows_store_certs fails with + PermissionError + +- Issue #18383: Avoid creating duplicate filters when using filterwarnings + and simplefilter. Based on patch by Alex Shkop. + +- Issue #23026: winreg.QueryValueEx() now return an integer for REG_QWORD type. + +- Issue #26741: subprocess.Popen destructor now emits a ResourceWarning warning + if the child process is still running. + +- Issue #27056: Optimize pickle.load() and pickle.loads(), up to 10% faster + to deserialize a lot of small objects. + +- Issue #21271: New keyword only parameters in reset_mock call. + +IDLE +---- + +- Issue #5124: Paste with text selected now replaces the selection on X11. + This matches how paste works on Windows, Mac, most modern Linux apps, + and ttk widgets. Original patch by Serhiy Storchaka. + +- Issue #24750: Switch all scrollbars in IDLE to ttk versions. + Where needed, minimal tests are added to cover changes. + +- Issue #24759: IDLE requires tk 8.5 and availability ttk widgets. + Delete now unneeded tk version tests and code for older versions. + Add test for IDLE syntax colorizoer. + +- Issue #27239: idlelib.macosx.isXyzTk functions initialize as needed. + +- Issue #27262: move Aqua unbinding code, which enable context menus, to maxosx. + +- Issue #24759: Make clear in idlelib.idle_test.__init__ that the directory + is a private implementation of test.test_idle and tool for maintainers. + +- Issue #27196: Stop 'ThemeChanged' warnings when running IDLE tests. + These persisted after other warnings were suppressed in #20567. + Apply Serhiy Storchaka's update_idletasks solution to four test files. + Record this additional advice in idle_test/README.txt + +- Issue #20567: Revise idle_test/README.txt with advice about avoiding + tk warning messages from tests. Apply advice to several IDLE tests. + +- Issue #24225: Update idlelib/README.txt with new file names + and event handlers. + +- Issue #27156: Remove obsolete code not used by IDLE. Replacements: + 1. help.txt, replaced by help.html, is out-of-date and should not be used. + Its dedicated viewer has be replaced by the html viewer in help.py. + 2. ``import idlever; I = idlever.IDLE_VERSION`` is the same as + ``import sys; I = version[:version.index(' ')]`` + 3. After ``ob = stackviewer.VariablesTreeItem(*args)``, + ``ob.keys() == list(ob.object.keys)``. + 4. In macosc, runningAsOSXAPP == isAquaTk; idCarbonAquaTk == isCarbonTk + +- Issue #27117: Make colorizer htest and turtledemo work with dark themes. + Move code for configuring text widget colors to a new function. + +- Issue #24225: Rename many `idlelib/*.py` and `idle_test/test_*.py` files. + Edit files to replace old names with new names when the old name + referred to the module rather than the class it contained. + See the issue and IDLE section in What's New in 3.6 for more. + +- Issue #26673: When tk reports font size as 0, change to size 10. + Such fonts on Linux prevented the configuration dialog from opening. + +- Issue #21939: Add test for IDLE's percolator. + Original patch by Saimadhav Heblikar. + +- Issue #21676: Add test for IDLE's replace dialog. + Original patch by Saimadhav Heblikar. + +- Issue #18410: Add test for IDLE's search dialog. + Original patch by Westley Martínez. + +- Issue #21703: Add test for undo delegator. Patch mostly by + Saimadhav Heblikar . + +- Issue #27044: Add ConfigDialog.remove_var_callbacks to stop memory leaks. + +- Issue #23977: Add more asserts to test_delegator. + +Documentation +------------- + +- Issue #16484: Change the default PYTHONDOCS URL to "https:", and fix the + resulting links to use lowercase. Patch by Sean Rodman, test by Kaushik + Nadikuditi. + +- Issue #24136: Document the new PEP 448 unpacking syntax of 3.5. + +- Issue #22558: Add remaining doc links to source code for Python-coded modules. + Patch by Yoni Lavi. + +Tests +----- + +- Issue #25285: regrtest now uses subprocesses when the -j1 command line option + is used: each test file runs in a fresh child process. Before, the -j1 option + was ignored. + +- Issue #25285: Tools/buildbot/test.bat script now uses -j1 by default to run + each test file in fresh child process. + +Windows +------- + +- Issue #27064: The py.exe launcher now defaults to Python 3. + The Windows launcher ``py.exe`` no longer prefers an installed + Python 2 version over Python 3 by default when used interactively. + +Build +----- + +- Issue #27229: Fix the cross-compiling pgen rule for in-tree builds. Patch + by Xavier de Gaye. + +- Issue #26930: Update OS X 10.5+ 32-bit-only installer to build + and link with OpenSSL 1.0.2h. + +Misc +---- + +- Issue #17500, and https://github.com/python/pythondotorg/issues/945: Remove + unused and outdated icons. + +C API +----- + +- Issue #27186: Add the PyOS_FSPath() function (part of PEP 519). + +- Issue #26282: PyArg_ParseTupleAndKeywords() now supports positional-only + parameters. + +Tools/Demos +----------- + +- Issue #26282: Argument Clinic now supports positional-only and keyword + parameters in the same function. + + +What's New in Python 3.6.0 alpha 1? +=================================== + +Release date: 2016-05-16 + +Core and Builtins +----------------- + +- Issue #20041: Fixed TypeError when frame.f_trace is set to None. + Patch by Xavier de Gaye. + +- Issue #26168: Fixed possible refleaks in failing Py_BuildValue() with the "N" + format unit. + +- Issue #26991: Fix possible refleak when creating a function with annotations. + +- Issue #27039: Fixed bytearray.remove() for values greater than 127. Based on + patch by Joe Jevnik. + +- Issue #23640: int.from_bytes() no longer bypasses constructors for subclasses. + +- Issue #27005: Optimized the float.fromhex() class method for exact float. + It is now 2 times faster. + +- Issue #18531: Single var-keyword argument of dict subtype was passed + unscathed to the C-defined function. Now it is converted to exact dict. + +- Issue #26811: gc.get_objects() no longer contains a broken tuple with NULL + pointer. + +- Issue #20120: Use RawConfigParser for .pypirc parsing, + removing support for interpolation unintentionally added + with move to Python 3. Behavior no longer does any + interpolation in .pypirc files, matching behavior in Python + 2.7 and Setuptools 19.0. + +- Issue #26249: Memory functions of the :c:func:`PyMem_Malloc` domain + (:c:data:`PYMEM_DOMAIN_MEM`) now use the :ref:`pymalloc allocator <pymalloc>` + rather than system :c:func:`malloc`. Applications calling + :c:func:`PyMem_Malloc` without holding the GIL can now crash: use + ``PYTHONMALLOC=debug`` environment variable to validate the usage of memory + allocators in your application. + +- Issue #26802: Optimize function calls only using unpacking like + ``func(*tuple)`` (no other positional argument, no keyword): avoid copying + the tuple. Patch written by Joe Jevnik. + +- Issue #26659: Make the builtin slice type support cycle collection. + +- Issue #26718: super.__init__ no longer leaks memory if called multiple times. + NOTE: A direct call of super.__init__ is not endorsed! + +- Issue #27138: Fix the doc comment for FileFinder.find_spec(). + +- Issue #27147: Mention PEP 420 in the importlib docs. + +- Issue #25339: PYTHONIOENCODING now has priority over locale in setting the + error handler for stdin and stdout. + +- Issue #26494: Fixed crash on iterating exhausting iterators. + Affected classes are generic sequence iterators, iterators of str, bytes, + bytearray, list, tuple, set, frozenset, dict, OrderedDict, corresponding + views and os.scandir() iterator. + +- Issue #26574: Optimize ``bytes.replace(b'', b'.')`` and + ``bytearray.replace(b'', b'.')``. Patch written by Josh Snider. + +- Issue #26581: If coding cookie is specified multiple times on a line in + Python source code file, only the first one is taken to account. + +- Issue #19711: Add tests for reloading namespace packages. + +- Issue #21099: Switch applicable importlib tests to use PEP 451 API. + +- Issue #26563: Debug hooks on Python memory allocators now raise a fatal + error if functions of the :c:func:`PyMem_Malloc` family are called without + holding the GIL. + +- Issue #26564: On error, the debug hooks on Python memory allocators now use + the :mod:`tracemalloc` module to get the traceback where a memory block was + allocated. + +- Issue #26558: The debug hooks on Python memory allocator + :c:func:`PyObject_Malloc` now detect when functions are called without + holding the GIL. + +- Issue #26516: Add :envvar:`PYTHONMALLOC` environment variable to set the + Python memory allocators and/or install debug hooks. + +- Issue #26516: The :c:func:`PyMem_SetupDebugHooks` function can now also be + used on Python compiled in release mode. + +- Issue #26516: The :envvar:`PYTHONMALLOCSTATS` environment variable can now + also be used on Python compiled in release mode. It now has no effect if + set to an empty string. + +- Issue #26516: In debug mode, debug hooks are now also installed on Python + memory allocators when Python is configured without pymalloc. + +- Issue #26464: Fix str.translate() when string is ASCII and first replacements + removes character, but next replacement uses a non-ASCII character or a + string longer than 1 character. Regression introduced in Python 3.5.0. + +- Issue #22836: Ensure exception reports from PyErr_Display() and + PyErr_WriteUnraisable() are sensible even when formatting them produces + secondary errors. This affects the reports produced by + sys.__excepthook__() and when __del__() raises an exception. + +- Issue #26302: Correct behavior to reject comma as a legal character for + cookie names. + +- Issue #26136: Upgrade the warning when a generator raises StopIteration + from PendingDeprecationWarning to DeprecationWarning. Patch by Anish + Shah. + +- Issue #26204: The compiler now ignores all constant statements: bytes, str, + int, float, complex, name constants (None, False, True), Ellipsis + and ast.Constant; not only str and int. For example, ``1.0`` is now ignored + in ``def f(): 1.0``. + +- Issue #4806: Avoid masking the original TypeError exception when using star + (*) unpacking in function calls. Based on patch by Hagen Fürstenau and + Daniel Urban. + +- Issue #26146: Add a new kind of AST node: ``ast.Constant``. It can be used + by external AST optimizers, but the compiler does not emit directly such + node. + +- Issue #23601: Sped-up allocation of dict key objects by using Python's + small object allocator. (Contributed by Julian Taylor.) + +- Issue #18018: Import raises ImportError instead of SystemError if a relative + import is attempted without a known parent package. + +- Issue #25843: When compiling code, don't merge constants if they are equal + but have a different types. For example, ``f1, f2 = lambda: 1, lambda: 1.0`` + is now correctly compiled to two different functions: ``f1()`` returns ``1`` + (``int``) and ``f2()`` returns ``1.0`` (``float``), even if ``1`` and ``1.0`` + are equal. + +- Issue #26107: The format of the ``co_lnotab`` attribute of code objects + changes to support negative line number delta. + +- Issue #26154: Add a new private _PyThreadState_UncheckedGet() function to get + the current Python thread state, but don't issue a fatal error if it is NULL. + This new function must be used instead of accessing directly the + _PyThreadState_Current variable. The variable is no more exposed since + Python 3.5.1 to hide the exact implementation of atomic C types, to avoid + compiler issues. + +- Issue #25791: If __package__ != __spec__.parent or if neither __package__ or + __spec__ are defined then ImportWarning is raised. + +- Issue #22995: [UPDATE] Comment out the one of the pickleability tests in + _PyObject_GetState() due to regressions observed in Cython-based projects. + +- Issue #25961: Disallowed null characters in the type name. + +- Issue #25973: Fix segfault when an invalid nonlocal statement binds a name + starting with two underscores. + +- Issue #22995: Instances of extension types with a state that aren't + subclasses of list or dict and haven't implemented any pickle-related + methods (__reduce__, __reduce_ex__, __getnewargs__, __getnewargs_ex__, + or __getstate__), can no longer be pickled. Including memoryview. + +- Issue #20440: Massive replacing unsafe attribute setting code with special + macro Py_SETREF. + +- Issue #25766: Special method __bytes__() now works in str subclasses. + +- Issue #25421: __sizeof__ methods of builtin types now use dynamic basic size. + This allows sys.getsize() to work correctly with their subclasses with + __slots__ defined. + +- Issue #25709: Fixed problem with in-place string concatenation and utf-8 + cache. + +- Issue #5319: New Py_FinalizeEx() API allowing Python to set an exit status + of 120 on failure to flush buffered streams. + +- Issue #25485: telnetlib.Telnet is now a context manager. + +- Issue #24097: Fixed crash in object.__reduce__() if slot name is freed inside + __getattr__. + +- Issue #24731: Fixed crash on converting objects with special methods + __bytes__, __trunc__, and __float__ returning instances of subclasses of + bytes, int, and float to subclasses of bytes, int, and float correspondingly. + +- Issue #25630: Fix a possible segfault during argument parsing in functions + that accept filesystem paths. + +- Issue #23564: Fixed a partially broken sanity check in the _posixsubprocess + internals regarding how fds_to_pass were passed to the child. The bug had + no actual impact as subprocess.py already avoided it. + +- Issue #25388: Fixed tokenizer crash when processing undecodable source code + with a null byte. + +- Issue #25462: The hash of the key now is calculated only once in most + operations in C implementation of OrderedDict. + +- Issue #22995: Default implementation of __reduce__ and __reduce_ex__ now + rejects builtin types with not defined __new__. + +- Issue #24802: Avoid buffer overreads when int(), float(), compile(), exec() + and eval() are passed bytes-like objects. These objects are not + necessarily terminated by a null byte, but the functions assumed they were. + +- Issue #25555: Fix parser and AST: fill lineno and col_offset of "arg" node + when compiling AST from Python objects. + +- Issue #24726: Fixed a crash and leaking NULL in repr() of OrderedDict that + was mutated by direct calls of dict methods. + +- Issue #25449: Iterating OrderedDict with keys with unstable hash now raises + KeyError in C implementations as well as in Python implementation. + +- Issue #25395: Fixed crash when highly nested OrderedDict structures were + garbage collected. + +- Issue #25401: Optimize bytes.fromhex() and bytearray.fromhex(): they are now + between 2x and 3.5x faster. + +- Issue #25399: Optimize bytearray % args using the new private _PyBytesWriter + API. Formatting is now between 2.5 and 5 times faster. + +- Issue #25274: sys.setrecursionlimit() now raises a RecursionError if the new + recursion limit is too low depending at the current recursion depth. Modify + also the "lower-water mark" formula to make it monotonic. This mark is used + to decide when the overflowed flag of the thread state is reset. + +- Issue #24402: Fix input() to prompt to the redirected stdout when + sys.stdout.fileno() fails. + +- Issue #25349: Optimize bytes % args using the new private _PyBytesWriter API. + Formatting is now up to 2 times faster. + +- Issue #24806: Prevent builtin types that are not allowed to be subclassed from + being subclassed through multiple inheritance. + +- Issue #25301: The UTF-8 decoder is now up to 15 times as fast for error + handlers: ``ignore``, ``replace`` and ``surrogateescape``. + +- Issue #24848: Fixed a number of bugs in UTF-7 decoding of misformed data. + +- Issue #25267: The UTF-8 encoder is now up to 75 times as fast for error + handlers: ``ignore``, ``replace``, ``surrogateescape``, ``surrogatepass``. + Patch co-written with Serhiy Storchaka. + +- Issue #25280: Import trace messages emitted in verbose (-v) mode are no + longer formatted twice. + +- Issue #25227: Optimize ASCII and latin1 encoders with the ``surrogateescape`` + error handler: the encoders are now up to 3 times as fast. Initial patch + written by Serhiy Storchaka. + +- Issue #25003: On Solaris 11.3 or newer, os.urandom() now uses the + getrandom() function instead of the getentropy() function. The getentropy() + function is blocking to generate very good quality entropy, os.urandom() + doesn't need such high-quality entropy. + +- Issue #9232: Modify Python's grammar to allow trailing commas in the + argument list of a function declaration. For example, "def f(\*, a = + 3,): pass" is now legal. Patch from Mark Dickinson. + +- Issue #24965: Implement PEP 498 "Literal String Interpolation". This + allows you to embed expressions inside f-strings, which are + converted to normal strings at run time. Given x=3, then + f'value={x}' == 'value=3'. Patch by Eric V. Smith. + +- Issue #26478: Fix semantic bugs when using binary operators with dictionary + views and tuples. + +- Issue #26171: Fix possible integer overflow and heap corruption in + zipimporter.get_data(). + +- Issue #25660: Fix TAB key behaviour in REPL with readline. + +- Issue #26288: Optimize PyLong_AsDouble. + +- Issues #26289 and #26315: Optimize floor and modulo division for + single-digit longs. Microbenchmarks show 2-2.5x improvement. Built-in + 'divmod' function is now also ~10% faster. + +- Issue #25887: Raise a RuntimeError when a coroutine object is awaited + more than once. + +Library +------- + +- Issue #27057: Fix os.set_inheritable() on Android, ioctl() is blocked by + SELinux and fails with EACCESS. The function now falls back to fcntl(). + Patch written by Michał Bednarski. + +- Issue #27014: Fix infinite recursion using typing.py. Thanks to Kalle Tuure! + +- Issue #27031: Removed dummy methods in Tkinter widget classes: tk_menuBar() + and tk_bindForTraversal(). + +- Issue #14132: Fix urllib.request redirect handling when the target only has + a query string. Original fix by Ján Janech. + +- Issue #17214: The "urllib.request" module now percent-encodes non-ASCII + bytes found in redirect target URLs. Some servers send Location header + fields with non-ASCII bytes, but "http.client" requires the request target + to be ASCII-encodable, otherwise a UnicodeEncodeError is raised. Based on + patch by Christian Heimes. + +- Issue #27033: The default value of the decode_data parameter for + smtpd.SMTPChannel and smtpd.SMTPServer constructors is changed to False. + +- Issue #27034: Removed deprecated class asynchat.fifo. + +- Issue #26870: Added readline.set_auto_history(), which can stop entries + being automatically added to the history list. Based on patch by Tyler + Crompton. + +- Issue #26039: zipfile.ZipFile.open() can now be used to write data into a ZIP + file, as well as for extracting data. Patch by Thomas Kluyver. + +- Issue #26892: Honor debuglevel flag in urllib.request.HTTPHandler. Patch + contributed by Chi Hsuan Yen. + +- Issue #22274: In the subprocess module, allow stderr to be redirected to + stdout even when stdout is not redirected. Patch by Akira Li. + +- Issue #26807: mock_open 'files' no longer error on readline at end of file. + Patch from Yolanda Robla. + +- Issue #25745: Fixed leaking a userptr in curses panel destructor. + +- Issue #26977: Removed unnecessary, and ignored, call to sum of squares helper + in statistics.pvariance. + +- Issue #26002: Use bisect in statistics.median instead of a linear search. + Patch by Upendra Kuma. + +- Issue #25974: Make use of new Decimal.as_integer_ratio() method in statistics + module. Patch by Stefan Krah. + +- Issue #26996: Add secrets module as described in PEP 506. + +- Issue #26881: The modulefinder module now supports extended opcode arguments. + +- Issue #23815: Fixed crashes related to directly created instances of types in + _tkinter and curses.panel modules. + +- Issue #17765: weakref.ref() no longer silently ignores keyword arguments. + Patch by Georg Brandl. + +- Issue #26873: xmlrpc now raises ResponseError on unsupported type tags + instead of silently return incorrect result. + +- Issue #26915: The __contains__ methods in the collections ABCs now check + for identity before checking equality. This better matches the behavior + of the concrete classes, allows sensible handling of NaNs, and makes it + easier to reason about container invariants. + +- Issue #26711: Fixed the comparison of plistlib.Data with other types. + +- Issue #24114: Fix an uninitialized variable in `ctypes.util`. + + The bug only occurs on SunOS when the ctypes implementation searches + for the `crle` program. Patch by Xiang Zhang. Tested on SunOS by + Kees Bos. + +- Issue #26864: In urllib.request, change the proxy bypass host checking + against no_proxy to be case-insensitive, and to not match unrelated host + names that happen to have a bypassed hostname as a suffix. Patch by Xiang + Zhang. + +- Issue #24902: Print server URL on http.server startup. Initial patch by + Felix Kaiser. + +- Issue #25788: fileinput.hook_encoded() now supports an "errors" argument + for passing to open. Original patch by Joseph Hackman. + +- Issue #26634: recursive_repr() now sets __qualname__ of wrapper. Patch by + Xiang Zhang. + +- Issue #26804: urllib.request will prefer lower_case proxy environment + variables over UPPER_CASE or Mixed_Case ones. Patch contributed by Hans-Peter + Jansen. + +- Issue #26837: assertSequenceEqual() now correctly outputs non-stringified + differing items (like bytes in the -b mode). This affects assertListEqual() + and assertTupleEqual(). + +- Issue #26041: Remove "will be removed in Python 3.7" from deprecation + messages of platform.dist() and platform.linux_distribution(). + Patch by Kumaripaba Miyurusara Athukorala. + +- Issue #26822: itemgetter, attrgetter and methodcaller objects no longer + silently ignore keyword arguments. + +- Issue #26733: Disassembling a class now disassembles class and static methods. + Patch by Xiang Zhang. + +- Issue #26801: Fix error handling in :func:`shutil.get_terminal_size`, catch + :exc:`AttributeError` instead of :exc:`NameError`. Patch written by Emanuel + Barry. + +- Issue #24838: tarfile's ustar and gnu formats now correctly calculate name + and link field limits for multibyte character encodings like utf-8. + +- [Security] Issue #26657: Fix directory traversal vulnerability with + http.server on Windows. This fixes a regression that was introduced in + 3.3.4rc1 and 3.4.0rc1. Based on patch by Philipp Hagemeister. + +- Issue #26717: Stop encoding Latin-1-ized WSGI paths with UTF-8. Patch by + Anthony Sottile. + +- Issue #26782: Add STARTUPINFO to subprocess.__all__ on Windows. + +- Issue #26404: Add context manager to socketserver. Patch by Aviv Palivoda. + +- Issue #26735: Fix :func:`os.urandom` on Solaris 11.3 and newer when reading + more than 1,024 bytes: call ``getrandom()`` multiple times with a limit of + 1024 bytes per call. + +- Issue #26585: Eliminate http.server._quote_html() and use + html.escape(quote=False). Patch by Xiang Zhang. + +- Issue #26685: Raise OSError if closing a socket fails. + +- Issue #16329: Add .webm to mimetypes.types_map. Patch by Giampaolo Rodola'. + +- Issue #13952: Add .csv to mimetypes.types_map. Patch by Geoff Wilson. + +- Issue #26587: the site module now allows .pth files to specify files to be + added to sys.path (e.g. zip files). + +- Issue #25609: Introduce contextlib.AbstractContextManager and + typing.ContextManager. + +- Issue #26709: Fixed Y2038 problem in loading binary PLists. + +- Issue #23735: Handle terminal resizing with Readline 6.3+ by installing our + own SIGWINCH handler. Patch by Eric Price. + +- Issue #25951: Change SSLSocket.sendall() to return None, as explicitly + documented for plain socket objects. Patch by Aviv Palivoda. + +- Issue #26586: In http.server, respond with "413 Request header fields too + large" if there are too many header fields to parse, rather than killing + the connection and raising an unhandled exception. Patch by Xiang Zhang. + +- Issue #26676: Added missing XMLPullParser to ElementTree.__all__. + +- Issue #22854: Change BufferedReader.writable() and + BufferedWriter.readable() to always return False. + +- Issue #26492: Exhausted iterator of array.array now conforms with the behavior + of iterators of other mutable sequences: it lefts exhausted even if iterated + array is extended. + +- Issue #26641: doctest.DocFileTest and doctest.testfile() now support + packages (module splitted into multiple directories) for the package + parameter. + +- Issue #25195: Fix a regression in mock.MagicMock. _Call is a subclass of + tuple (changeset 3603bae63c13 only works for classes) so we need to + implement __ne__ ourselves. Patch by Andrew Plummer. + +- Issue #26644: Raise ValueError rather than SystemError when a negative + length is passed to SSLSocket.recv() or read(). + +- Issue #23804: Fix SSL recv(0) and read(0) methods to return zero bytes + instead of up to 1024. + +- Issue #26616: Fixed a bug in datetime.astimezone() method. + +- Issue #26637: The :mod:`importlib` module now emits an :exc:`ImportError` + rather than a :exc:`TypeError` if :func:`__import__` is tried during the + Python shutdown process but :data:`sys.path` is already cleared (set to + ``None``). + +- Issue #21925: :func:`warnings.formatwarning` now catches exceptions when + calling :func:`linecache.getline` and + :func:`tracemalloc.get_object_traceback` to be able to log + :exc:`ResourceWarning` emitted late during the Python shutdown process. + +- Issue #23848: On Windows, faulthandler.enable() now also installs an + exception handler to dump the traceback of all Python threads on any Windows + exception, not only on UNIX signals (SIGSEGV, SIGFPE, SIGABRT). + +- Issue #26530: Add C functions :c:func:`_PyTraceMalloc_Track` and + :c:func:`_PyTraceMalloc_Untrack` to track memory blocks using the + :mod:`tracemalloc` module. Add :c:func:`_PyTraceMalloc_GetTraceback` to get + the traceback of an object. + +- Issue #26588: The _tracemalloc now supports tracing memory allocations of + multiple address spaces (domains). + +- Issue #24266: Ctrl+C during Readline history search now cancels the search + mode when compiled with Readline 7. + +- Issue #26590: Implement a safe finalizer for the _socket.socket type. It now + releases the GIL to close the socket. + +- Issue #18787: spwd.getspnam() now raises a PermissionError if the user + doesn't have privileges. + +- Issue #26560: Avoid potential ValueError in BaseHandler.start_response. + Initial patch by Peter Inglesby. + +- Issue #26567: Add a new function :c:func:`PyErr_ResourceWarning` function to + pass the destroyed object. Add a *source* attribute to + :class:`warnings.WarningMessage`. Add warnings._showwarnmsg() which uses + tracemalloc to get the traceback where source object was allocated. + +- [Security] Issue #26313: ssl.py _load_windows_store_certs fails if windows + cert store is empty. Patch by Baji. + +- Issue #26569: Fix :func:`pyclbr.readmodule` and :func:`pyclbr.readmodule_ex` + to support importing packages. + +- Issue #26499: Account for remaining Content-Length in + HTTPResponse.readline() and read1(). Based on patch by Silent Ghost. + Also document that HTTPResponse now supports these methods. + +- Issue #25320: Handle sockets in directories unittest discovery is scanning. + Patch from Victor van den Elzen. + +- Issue #16181: cookiejar.http2time() now returns None if year is higher than + datetime.MAXYEAR. + +- Issue #26513: Fixes platform module detection of Windows Server + +- Issue #23718: Fixed parsing time in week 0 before Jan 1. Original patch by + Tamás Bence Gedai. + +- Issue #26323: Add Mock.assert_called() and Mock.assert_called_once() + methods to unittest.mock. Patch written by Amit Saha. + +- Issue #20589: Invoking Path.owner() and Path.group() on Windows now raise + NotImplementedError instead of ImportError. + +- Issue #26177: Fixed the keys() method for Canvas and Scrollbar widgets. + +- Issue #15068: Got rid of excessive buffering in fileinput. + The bufsize parameter is now deprecated and ignored. + +- Issue #19475: Added an optional argument timespec to the datetime + isoformat() method to choose the precision of the time component. + +- Issue #2202: Fix UnboundLocalError in + AbstractDigestAuthHandler.get_algorithm_impls. Initial patch by Mathieu + Dupuy. + +- Issue #26167: Minimized overhead in copy.copy() and copy.deepcopy(). + Optimized copying and deepcopying bytearrays, NotImplemented, slices, + short lists, tuples, dicts, sets. + +- Issue #25718: Fixed pickling and copying the accumulate() iterator with + total is None. + +- Issue #26475: Fixed debugging output for regular expressions with the (?x) + flag. + +- Issue #26482: Allowed pickling recursive dequeues. + +- Issue #26335: Make mmap.write() return the number of bytes written like + other write methods. Patch by Jakub Stasiak. + +- Issue #26457: Fixed the subnets() methods in IP network classes for the case + when resulting prefix length is equal to maximal prefix length. + Based on patch by Xiang Zhang. + +- Issue #26385: Remove the file if the internal open() call in + NamedTemporaryFile() fails. Patch by Silent Ghost. + +- Issue #26402: Fix XML-RPC client to retry when the server shuts down a + persistent connection. This was a regression related to the new + http.client.RemoteDisconnected exception in 3.5.0a4. + +- Issue #25913: Leading ``<~`` is optional now in base64.a85decode() with + adobe=True. Patch by Swati Jaiswal. + +- Issue #26186: Remove an invalid type check in importlib.util.LazyLoader. + +- Issue #26367: importlib.__import__() raises ImportError like + builtins.__import__() when ``level`` is specified but without an accompanying + package specified. + +- Issue #26309: In the "socketserver" module, shut down the request (closing + the connected socket) when verify_request() returns false. Patch by Aviv + Palivoda. + +- Issue #23430: Change the socketserver module to only catch exceptions + raised from a request handler that are derived from Exception (instead of + BaseException). Therefore SystemExit and KeyboardInterrupt no longer + trigger the handle_error() method, and will now to stop a single-threaded + server. + +- [Security] Issue #25939: On Windows open the cert store readonly in + ssl.enum_certificates. + +- Issue #25995: os.walk() no longer uses FDs proportional to the tree depth. + +- Issue #25994: Added the close() method and the support of the context manager + protocol for the os.scandir() iterator. + +- Issue #23992: multiprocessing: make MapResult not fail-fast upon exception. + +- Issue #26243: Support keyword arguments to zlib.compress(). Patch by Aviv + Palivoda. + +- Issue #26117: The os.scandir() iterator now closes file descriptor not only + when the iteration is finished, but when it was failed with error. + +- Issue #25949: __dict__ for an OrderedDict instance is now created only when + needed. + +- Issue #25911: Restored support of bytes paths in os.walk() on Windows. + +- Issue #26045: Add UTF-8 suggestion to error message when posting a + non-Latin-1 string with http.client. + +- Issue #26039: Added zipfile.ZipInfo.from_file() and zipinfo.ZipInfo.is_dir(). + Patch by Thomas Kluyver. + +- Issue #12923: Reset FancyURLopener's redirect counter even if there is an + exception. Based on patches by Brian Brazil and Daniel Rocco. + +- Issue #25945: Fixed a crash when unpickle the functools.partial object with + wrong state. Fixed a leak in failed functools.partial constructor. + "args" and "keywords" attributes of functools.partial have now always types + tuple and dict correspondingly. + +- Issue #26202: copy.deepcopy() now correctly copies range() objects with + non-atomic attributes. + +- Issue #23076: Path.glob() now raises a ValueError if it's called with an + invalid pattern. Patch by Thomas Nyberg. + +- Issue #19883: Fixed possible integer overflows in zipimport. + +- Issue #26227: On Windows, getnameinfo(), gethostbyaddr() and + gethostbyname_ex() functions of the socket module now decode the hostname + from the ANSI code page rather than UTF-8. + +- Issue #26099: The site module now writes an error into stderr if + sitecustomize module can be imported but executing the module raise an + ImportError. Same change for usercustomize. + +- Issue #26147: xmlrpc now works with strings not encodable with used + non-UTF-8 encoding. + +- Issue #25935: Garbage collector now breaks reference loops with OrderedDict. + +- Issue #16620: Fixed AttributeError in msilib.Directory.glob(). + +- Issue #26013: Added compatibility with broken protocol 2 pickles created + in old Python 3 versions (3.4.3 and lower). + +- Issue #26129: Deprecated accepting non-integers in grp.getgrgid(). + +- Issue #25850: Use cross-compilation by default for 64-bit Windows. + +- Issue #25822: Add docstrings to the fields of urllib.parse results. + Patch contributed by Swati Jaiswal. + +- Issue #22642: Convert trace module option parsing mechanism to argparse. + Patch contributed by SilentGhost. + +- Issue #24705: Fix sysconfig._parse_makefile not expanding ${} vars + appearing before $() vars. + +- Issue #26069: Remove the deprecated apis in the trace module. + +- Issue #22138: Fix mock.patch behavior when patching descriptors. Restore + original values after patching. Patch contributed by Sean McCully. + +- Issue #25672: In the ssl module, enable the SSL_MODE_RELEASE_BUFFERS mode + option if it is safe to do so. + +- Issue #26012: Don't traverse into symlinks for ** pattern in + pathlib.Path.[r]glob(). + +- Issue #24120: Ignore PermissionError when traversing a tree with + pathlib.Path.[r]glob(). Patch by Ulrich Petri. + +- Issue #21815: Accept ] characters in the data portion of imap responses, + in order to handle the flags with square brackets accepted and produced + by servers such as gmail. + +- Issue #25447: fileinput now uses sys.stdin as-is if it does not have a + buffer attribute (restores backward compatibility). + +- Issue #25971: Optimized creating Fractions from floats by 2 times and from + Decimals by 3 times. + +- Issue #25802: Document as deprecated the remaining implementations of + importlib.abc.Loader.load_module(). + +- Issue #25928: Add Decimal.as_integer_ratio(). + +- Issue #25447: Copying the lru_cache() wrapper object now always works, + independently from the type of the wrapped object (by returning the original + object unchanged). + +- Issue #25768: Have the functions in compileall return booleans instead of + ints and add proper documentation and tests for the return values. + +- Issue #24103: Fixed possible use after free in ElementTree.XMLPullParser. + +- Issue #25860: os.fwalk() no longer skips remaining directories when error + occurs. Original patch by Samson Lee. + +- Issue #25914: Fixed and simplified OrderedDict.__sizeof__. + +- Issue #25869: Optimized deepcopying ElementTree; it is now 20 times faster. + +- Issue #25873: Optimized iterating ElementTree. Iterating elements + Element.iter() is now 40% faster, iterating text Element.itertext() + is now up to 2.5 times faster. + +- Issue #25902: Fixed various refcount issues in ElementTree iteration. + +- Issue #22227: The TarFile iterator is reimplemented using generator. + This implementation is simpler that using class. + +- Issue #25638: Optimized ElementTree.iterparse(); it is now 2x faster. + Optimized ElementTree parsing; it is now 10% faster. + +- Issue #25761: Improved detecting errors in broken pickle data. + +- Issue #25717: Restore the previous behaviour of tolerating most fstat() + errors when opening files. This was a regression in 3.5a1, and stopped + anonymous temporary files from working in special cases. + +- Issue #24903: Fix regression in number of arguments compileall accepts when + '-d' is specified. The check on the number of arguments has been dropped + completely as it never worked correctly anyway. + +- Issue #25764: In the subprocess module, preserve any exception caused by + fork() failure when preexec_fn is used. + +- Issue #25771: Tweak the exception message for importlib.util.resolve_name() + when 'package' isn't specified but necessary. + +- Issue #6478: _strptime's regexp cache now is reset after changing timezone + with time.tzset(). + +- Issue #14285: When executing a package with the "python -m package" option, + and package initialization fails, a proper traceback is now reported. The + "runpy" module now lets exceptions from package initialization pass back to + the caller, rather than raising ImportError. + +- Issue #19771: Also in runpy and the "-m" option, omit the irrelevant + message ". . . is a package and cannot be directly executed" if the package + could not even be initialized (e.g. due to a bad ``*.pyc`` file). + +- Issue #25177: Fixed problem with the mean of very small and very large + numbers. As a side effect, statistics.mean and statistics.variance should + be significantly faster. + +- Issue #25718: Fixed copying object with state with boolean value is false. + +- Issue #10131: Fixed deep copying of minidom documents. Based on patch + by Marian Ganisin. + +- Issue #7990: dir() on ElementTree.Element now lists properties: "tag", + "text", "tail" and "attrib". Original patch by Santoso Wijaya. + +- Issue #25725: Fixed a reference leak in pickle.loads() when unpickling + invalid data including tuple instructions. + +- Issue #25663: In the Readline completer, avoid listing duplicate global + names, and search the global namespace before searching builtins. + +- Issue #25688: Fixed file leak in ElementTree.iterparse() raising an error. + +- Issue #23914: Fixed SystemError raised by unpickler on broken pickle data. + +- Issue #25691: Fixed crash on deleting ElementTree.Element attributes. + +- Issue #25624: ZipFile now always writes a ZIP_STORED header for directory + entries. Patch by Dingyuan Wang. + +- Issue #25626: Change three zlib functions to accept sizes that fit in + Py_ssize_t, but internally cap those sizes to UINT_MAX. This resolves a + regression in 3.5 where GzipFile.read() failed to read chunks larger than 2 + or 4 GiB. The change affects the zlib.Decompress.decompress() max_length + parameter, the zlib.decompress() bufsize parameter, and the + zlib.Decompress.flush() length parameter. + +- Issue #25583: Avoid incorrect errors raised by os.makedirs(exist_ok=True) + when the OS gives priority to errors such as EACCES over EEXIST. + +- Issue #25593: Change semantics of EventLoop.stop() in asyncio. + +- Issue #6973: When we know a subprocess.Popen process has died, do + not allow the send_signal(), terminate(), or kill() methods to do + anything as they could potentially signal a different process. + +- Issue #23883: Added missing APIs to __all__ to match the documented APIs + for the following modules: calendar, csv, enum, fileinput, ftplib, logging, + optparse, tarfile, threading and wave. Also added a + test.support.check__all__() helper. Patches by Jacek Kołodziej, Mauro + S. M. Rodrigues and Joel Taddei. + +- Issue #25590: In the Readline completer, only call getattr() once per + attribute. Also complete names of attributes such as properties and slots + which are listed by dir() but not yet created on an instance. + +- Issue #25498: Fix a crash when garbage-collecting ctypes objects created + by wrapping a memoryview. This was a regression made in 3.5a1. Based + on patch by Eryksun. + +- Issue #25584: Added "escape" to the __all__ list in the glob module. + +- Issue #25584: Fixed recursive glob() with patterns starting with '\*\*'. + +- Issue #25446: Fix regression in smtplib's AUTH LOGIN support. + +- Issue #18010: Fix the pydoc web server's module search function to handle + exceptions from importing packages. + +- Issue #25554: Got rid of circular references in regular expression parsing. + +- Issue #18973: Command-line interface of the calendar module now uses argparse + instead of optparse. + +- Issue #25510: fileinput.FileInput.readline() now returns b'' instead of '' + at the end if the FileInput was opened with binary mode. + Patch by Ryosuke Ito. + +- Issue #25503: Fixed inspect.getdoc() for inherited docstrings of properties. + Original patch by John Mark Vandenberg. + +- Issue #25515: Always use os.urandom as a source of randomness in uuid.uuid4. + +- Issue #21827: Fixed textwrap.dedent() for the case when largest common + whitespace is a substring of smallest leading whitespace. + Based on patch by Robert Li. + +- Issue #25447: The lru_cache() wrapper objects now can be copied and pickled + (by returning the original object unchanged). + +- Issue #25390: typing: Don't crash on Union[str, Pattern]. + +- Issue #25441: asyncio: Raise error from drain() when socket is closed. + +- Issue #25410: Cleaned up and fixed minor bugs in C implementation of + OrderedDict. + +- Issue #25411: Improved Unicode support in SMTPHandler through better use of + the email package. Thanks to user simon04 for the patch. + +- Move the imp module from a PendingDeprecationWarning to DeprecationWarning. + +- Issue #25407: Remove mentions of the formatter module being removed in + Python 3.6. + +- Issue #25406: Fixed a bug in C implementation of OrderedDict.move_to_end() + that caused segmentation fault or hang in iterating after moving several + items to the start of ordered dict. + +- Issue #25382: pickletools.dis() now outputs implicit memo index for the + MEMOIZE opcode. + +- Issue #25357: Add an optional newline paramer to binascii.b2a_base64(). + base64.b64encode() uses it to avoid a memory copy. + +- Issue #24164: Objects that need calling ``__new__`` with keyword arguments, + can now be pickled using pickle protocols older than protocol version 4. + +- Issue #25364: zipfile now works in threads disabled builds. + +- Issue #25328: smtpd's SMTPChannel now correctly raises a ValueError if both + decode_data and enable_SMTPUTF8 are set to true. + +- Issue #16099: RobotFileParser now supports Crawl-delay and Request-rate + extensions. Patch by Nikolay Bogoychev. + +- Issue #25316: distutils raises OSError instead of DistutilsPlatformError + when MSVC is not installed. + +- Issue #25380: Fixed protocol for the STACK_GLOBAL opcode in + pickletools.opcodes. + +- Issue #23972: Updates asyncio datagram create method allowing reuseport + and reuseaddr socket options to be set prior to binding the socket. + Mirroring the existing asyncio create_server method the reuseaddr option + for datagram sockets defaults to True if the O/S is 'posix' (except if the + platform is Cygwin). Patch by Chris Laws. + +- Issue #25304: Add asyncio.run_coroutine_threadsafe(). This lets you + submit a coroutine to a loop from another thread, returning a + concurrent.futures.Future. By Vincent Michel. + +- Issue #25232: Fix CGIRequestHandler to split the query from the URL at the + first question mark (?) rather than the last. Patch from Xiang Zhang. + +- Issue #24657: Prevent CGIRequestHandler from collapsing slashes in the + query part of the URL as if it were a path. Patch from Xiang Zhang. + +- Issue #25287: Don't add crypt.METHOD_CRYPT to crypt.methods if it's not + supported. Check if it is supported, it may not be supported on OpenBSD for + example. + +- Issue #23600: Default implementation of tzinfo.fromutc() was returning + wrong results in some cases. + +- Issue #25203: Failed readline.set_completer_delims() no longer left the + module in inconsistent state. + +- Issue #25011: rlcompleter now omits private and special attribute names unless + the prefix starts with underscores. + +- Issue #25209: rlcompleter now can add a space or a colon after completed + keyword. + +- Issue #22241: timezone.utc name is now plain 'UTC', not 'UTC-00:00'. + +- Issue #23517: fromtimestamp() and utcfromtimestamp() methods of + datetime.datetime now round microseconds to nearest with ties going to + nearest even integer (ROUND_HALF_EVEN), as round(float), instead of rounding + towards -Infinity (ROUND_FLOOR). + +- Issue #23552: Timeit now warns when there is substantial (4x) variance + between best and worst times. Patch from Serhiy Storchaka. + +- Issue #24633: site-packages/README -> README.txt. + +- Issue #24879: help() and pydoc can now list named tuple fields in the + order they were defined rather than alphabetically. The ordering is + determined by the _fields attribute if present. + +- Issue #24874: Improve speed of itertools.cycle() and make its + pickle more compact. + +- Fix crash in itertools.cycle.__setstate__() when the first argument wasn't + a list. + +- Issue #20059: urllib.parse raises ValueError on all invalid ports. + Patch by Martin Panter. + +- Issue #24360: Improve __repr__ of argparse.Namespace() for invalid + identifiers. Patch by Matthias Bussonnier. + +- Issue #23426: run_setup was broken in distutils. + Patch from Alexander Belopolsky. + +- Issue #13938: 2to3 converts StringTypes to a tuple. Patch from Mark Hammond. + +- Issue #2091: open() accepted a 'U' mode string containing '+', but 'U' can + only be used with 'r'. Patch from Jeff Balogh and John O'Connor. + +- Issue #8585: improved tests for zipimporter2. Patch from Mark Lawrence. + +- Issue #18622: unittest.mock.mock_open().reset_mock would recurse infinitely. + Patch from Nicola Palumbo and Laurent De Buyst. + +- Issue #24426: Fast searching optimization in regular expressions now works + for patterns that starts with capturing groups. Fast searching optimization + now can't be disabled at compile time. + +- Issue #23661: unittest.mock side_effects can now be exceptions again. This + was a regression vs Python 3.4. Patch from Ignacio Rossi + +- Issue #13248: Remove deprecated inspect.getmoduleinfo function. + +- Issue #25578: Fix (another) memory leak in SSLSocket.getpeercer(). + +- Issue #25530: Disable the vulnerable SSLv3 protocol by default when creating + ssl.SSLContext. + +- Issue #25569: Fix memory leak in SSLSocket.getpeercert(). + +- Issue #25471: Sockets returned from accept() shouldn't appear to be + nonblocking. + +- Issue #25319: When threading.Event is reinitialized, the underlying condition + should use a regular lock rather than a recursive lock. + +- Skip getaddrinfo if host is already resolved. + Patch by A. Jesse Jiryu Davis. + +- Issue #26050: Add asyncio.StreamReader.readuntil() method. + Patch by Марк Коренберг. + +- Issue #25924: Avoid unnecessary serialization of getaddrinfo(3) calls on + OS X versions 10.5 or higher. Original patch by A. Jesse Jiryu Davis. + +- Issue #26406: Avoid unnecessary serialization of getaddrinfo(3) calls on + current versions of OpenBSD and NetBSD. Patch by A. Jesse Jiryu Davis. + +- Issue #26848: Fix asyncio/subprocess.communicate() to handle empty input. + Patch by Jack O'Connor. + +- Issue #27040: Add loop.get_exception_handler method + +- Issue #27041: asyncio: Add loop.create_future method + +IDLE +---- + +- Issue #20640: Add tests for idlelib.configHelpSourceEdit. + Patch by Saimadhav Heblikar. + +- In the 'IDLE-console differences' section of the IDLE doc, clarify + how running with IDLE affects sys.modules and the standard streams. + +- Issue #25507: fix incorrect change in IOBinding that prevented printing. + Augment IOBinding htest to include all major IOBinding functions. + +- Issue #25905: Revert unwanted conversion of ' to ’ RIGHT SINGLE QUOTATION + MARK in README.txt and open this and NEWS.txt with 'ascii'. + Re-encode CREDITS.txt to utf-8 and open it with 'utf-8'. + +- Issue #15348: Stop the debugger engine (normally in a user process) + before closing the debugger window (running in the IDLE process). + This prevents the RuntimeErrors that were being caught and ignored. + +- Issue #24455: Prevent IDLE from hanging when a) closing the shell while the + debugger is active (15347); b) closing the debugger with the [X] button + (15348); and c) activating the debugger when already active (24455). + The patch by Mark Roseman does this by making two changes. + 1. Suspend and resume the gui.interaction method with the tcl vwait + mechanism intended for this purpose (instead of root.mainloop & .quit). + 2. In gui.run, allow any existing interaction to terminate first. + +- Change 'The program' to 'Your program' in an IDLE 'kill program?' message + to make it clearer that the program referred to is the currently running + user program, not IDLE itself. + +- Issue #24750: Improve the appearance of the IDLE editor window status bar. + Patch by Mark Roseman. + +- Issue #25313: Change the handling of new built-in text color themes to better + address the compatibility problem introduced by the addition of IDLE Dark. + Consistently use the revised idleConf.CurrentTheme everywhere in idlelib. + +- Issue #24782: Extension configuration is now a tab in the IDLE Preferences + dialog rather than a separate dialog. The former tabs are now a sorted + list. Patch by Mark Roseman. + +- Issue #22726: Re-activate the config dialog help button with some content + about the other buttons and the new IDLE Dark theme. + +- Issue #24820: IDLE now has an 'IDLE Dark' built-in text color theme. + It is more or less IDLE Classic inverted, with a cobalt blue background. + Strings, comments, keywords, ... are still green, red, orange, ... . + To use it with IDLEs released before November 2015, hit the + 'Save as New Custom Theme' button and enter a new name, + such as 'Custom Dark'. The custom theme will work with any IDLE + release, and can be modified. + +- Issue #25224: README.txt is now an idlelib index for IDLE developers and + curious users. The previous user content is now in the IDLE doc chapter. + 'IDLE' now means 'Integrated Development and Learning Environment'. + +- Issue #24820: Users can now set breakpoint colors in + Settings -> Custom Highlighting. Original patch by Mark Roseman. + +- Issue #24972: Inactive selection background now matches active selection + background, as configured by users, on all systems. Found items are now + always highlighted on Windows. Initial patch by Mark Roseman. + +- Issue #24570: Idle: make calltip and completion boxes appear on Macs + affected by a tk regression. Initial patch by Mark Roseman. + +- Issue #24988: Idle ScrolledList context menus (used in debugger) + now work on Mac Aqua. Patch by Mark Roseman. + +- Issue #24801: Make right-click for context menu work on Mac Aqua. + Patch by Mark Roseman. + +- Issue #25173: Associate tkinter messageboxes with a specific widget. + For Mac OSX, make them a 'sheet'. Patch by Mark Roseman. + +- Issue #25198: Enhance the initial html viewer now used for Idle Help. + * Properly indent fixed-pitch text (patch by Mark Roseman). + * Give code snippet a very Sphinx-like light blueish-gray background. + * Re-use initial width and height set by users for shell and editor. + * When the Table of Contents (TOC) menu is used, put the section header + at the top of the screen. + +- Issue #25225: Condense and rewrite Idle doc section on text colors. + +- Issue #21995: Explain some differences between IDLE and console Python. + +- Issue #22820: Explain need for *print* when running file from Idle editor. + +- Issue #25224: Doc: augment Idle feature list and no-subprocess section. + +- Issue #25219: Update doc for Idle command line options. + Some were missing and notes were not correct. + +- Issue #24861: Most of idlelib is private and subject to change. + Use idleib.idle.* to start Idle. See idlelib.__init__.__doc__. + +- Issue #25199: Idle: add synchronization comments for future maintainers. + +- Issue #16893: Replace help.txt with help.html for Idle doc display. + The new idlelib/help.html is rstripped Doc/build/html/library/idle.html. + It looks better than help.txt and will better document Idle as released. + The tkinter html viewer that works for this file was written by Rose Roseman. + The now unused EditorWindow.HelpDialog class and helt.txt file are deprecated. + +- Issue #24199: Deprecate unused idlelib.idlever with possible removal in 3.6. + +- Issue #24790: Remove extraneous code (which also create 2 & 3 conflicts). + +Documentation +------------- + +- Issue #26736: Used HTTPS for external links in the documentation if possible. + +- Issue #6953: Rework the Readline module documentation to group related + functions together, and add more details such as what underlying Readline + functions and variables are accessed. + +- Issue #23606: Adds note to ctypes documentation regarding cdll.msvcrt. + +- Issue #24952: Clarify the default size argument of stack_size() in + the "threading" and "_thread" modules. Patch from Mattip. + +- Issue #26014: Update 3.x packaging documentation: + * "See also" links to the new docs are now provided in the legacy pages + * links to setuptools documentation have been updated + +Tests +----- + +- Issue #21916: Added tests for the turtle module. Patch by ingrid, + Gregory Loyse and Jelle Zijlstra. + +- Issue #26295: When using "python3 -m test --testdir=TESTDIR", regrtest + doesn't add "test." prefix to test module names. + +- Issue #26523: The multiprocessing thread pool (multiprocessing.dummy.Pool) + was untested. + +- Issue #26015: Added new tests for pickling iterators of mutable sequences. + +- Issue #26325: Added test.support.check_no_resource_warning() to check that + no ResourceWarning is emitted. + +- Issue #25940: Changed test_ssl to use its internal local server more. This + avoids relying on svn.python.org, which recently changed root certificate. + +- Issue #25616: Tests for OrderedDict are extracted from test_collections + into separate file test_ordered_dict. + +- Issue #25449: Added tests for OrderedDict subclasses. + +- Issue #25188: Add -P/--pgo to test.regrtest to suppress error output when + running the test suite for the purposes of a PGO build. Initial patch by + Alecsandru Patrascu. + +- Issue #22806: Add ``python -m test --list-tests`` command to list tests. + +- Issue #18174: ``python -m test --huntrleaks ...`` now also checks for leak of + file descriptors. Patch written by Richard Oudkerk. + +- Issue #25260: Fix ``python -m test --coverage`` on Windows. Remove the + list of ignored directories. + +- ``PCbuild\rt.bat`` now accepts an unlimited number of arguments to pass along + to regrtest.py. Previously there was a limit of 9. + +- Issue #26583: Skip test_timestamp_overflow in test_import if bytecode + files cannot be written. + +Build +----- + +- Issue #21277: Don't try to link _ctypes with a ffi_convenience library. + +- Issue #26884: Fix linking extension modules for cross builds. + Patch by Xavier de Gaye. + +- Issue #26932: Fixed support of RTLD_* constants defined as enum values, + not via macros (in particular on Android). Patch by Chi Hsuan Yen. + +- Issue #22359: Disable the rules for running _freeze_importlib and pgen when + cross-compiling. The output of these programs is normally saved with the + source code anyway, and is still regenerated when doing a native build. + Patch by Xavier de Gaye. + +- Issue #21668: Link audioop, _datetime, _ctypes_test modules to libm, + except on Mac OS X. Patch written by Chi Hsuan Yen. + +- Issue #25702: A --with-lto configure option has been added that will + enable link time optimizations at build time during a make profile-opt. + Some compilers and toolchains are known to not produce stable code when + using LTO, be sure to test things thoroughly before relying on it. + It can provide a few % speed up over profile-opt alone. + +- Issue #26624: Adds validation of ucrtbase[d].dll version with warning + for old versions. + +- Issue #17603: Avoid error about nonexistant fileblocks.o file by using a + lower-level check for st_blocks in struct stat. + +- Issue #26079: Fixing the build output folder for tix-8.4.3.6. Patch by + Bjoern Thiel. + +- Issue #26465: Update Windows builds to use OpenSSL 1.0.2g. + +- Issue #25348: Added ``--pgo`` and ``--pgo-job`` arguments to + ``PCbuild\build.bat`` for building with Profile-Guided Optimization. The + old ``PCbuild\build_pgo.bat`` script is removed. + +- Issue #25827: Add support for building with ICC to ``configure``, including + a new ``--with-icc`` flag. + +- Issue #25696: Fix installation of Python on UNIX with make -j9. + +- Issue #24986: It is now possible to build Python on Windows without errors + when external libraries are not available. + +- Issue #24421: Compile Modules/_math.c once, before building extensions. + Previously it could fail to compile properly if the math and cmath builds + were concurrent. + +- Issue #26465: Update OS X 10.5+ 32-bit-only installer to build + and link with OpenSSL 1.0.2g. + +- Issue #26268: Update Windows builds to use OpenSSL 1.0.2f. + +- Issue #25136: Support Apple Xcode 7's new textual SDK stub libraries. + +- Issue #24324: Do not enable unreachable code warnings when using + gcc as the option does not work correctly in older versions of gcc + and has been silently removed as of gcc-4.5. + +Windows +------- + +- Issue #27053: Updates make_zip.py to correctly generate library ZIP file. + +- Issue #26268: Update the prepare_ssl.py script to handle OpenSSL releases + that don't include the contents of the include directory (that is, 1.0.2e + and later). + +- Issue #26071: bdist_wininst created binaries fail to start and find + 32bit Python + +- Issue #26073: Update the list of magic numbers in launcher + +- Issue #26065: Excludes venv from library when generating embeddable + distro. + +- Issue #25022: Removed very outdated PC/example_nt/ directory. + +Tools/Demos +----------- + +- Issue #26799: Fix python-gdb.py: don't get C types once when the Python code + is loaded, but get C types on demand. The C types can change if + python-gdb.py is loaded before the Python executable. Patch written by Thomas + Ilsche. + +- Issue #26271: Fix the Freeze tool to properly use flags passed through + configure. Patch by Daniel Shaulov. + +- Issue #26489: Add dictionary unpacking support to Tools/parser/unparse.py. + Patch by Guo Ci Teo. + +- Issue #26316: Fix variable name typo in Argument Clinic. + +- Issue #25440: Fix output of python-config --extension-suffix. + +- Issue #25154: The pyvenv script has been deprecated in favour of + `python3 -m venv`. + +C API +----- + +- Issue #26312: SystemError is now raised in all programming bugs with using + PyArg_ParseTupleAndKeywords(). RuntimeError did raised before in some + programming bugs. + +- Issue #26198: ValueError is now raised instead of TypeError on buffer + overflow in parsing "es#" and "et#" format units. SystemError is now raised + instead of TypeError on programmical error in parsing format string. + What's New in Python 3.5.3? =========================== @@ -5099,4289 +8395,4 @@ Windows ".cp35-win32.pyd") will now be loaded in preference to those without tags. -What's New in Python 3.4.0? -=========================== - -Release date: 2014-03-16 - -Library -------- - -- Issue #20939: Fix test_geturl failure in test_urllibnet due to - new redirect of http://www.python.org/ to https://www.python.org. - -Documentation -------------- - -- Merge in all documentation changes since branching 3.4.0rc1. - - -What's New in Python 3.4.0 release candidate 3? -=============================================== - -Release date: 2014-03-09 - -Core and Builtins ------------------ - -- Issue #20786: Fix signatures for dict.__delitem__ and - property.__delete__ builtins. - -Library -------- - -- Issue #20839: Don't trigger a DeprecationWarning in the still supported - pkgutil.get_loader() API when __loader__ isn't set on a module (nor - when pkgutil.find_loader() is called directly). - -Build ------ - -- Issue #14512: Launch pydoc -b instead of pydocgui.pyw on Windows. - -- Issue #20748: Uninstalling pip does not leave behind the pyc of - the uninstaller anymore. - -- Issue #20568: The Windows installer now installs the unversioned ``pip`` - command in addition to the versioned ``pip3`` and ``pip3.4`` commands. - -- Issue #20757: The ensurepip helper for the Windows uninstaller now skips - uninstalling pip (rather than failing) if the user has updated pip to a - different version from the one bundled with ensurepip. - -- Issue #20465: Update OS X and Windows installer builds to use - SQLite 3.8.3.1. - - -What's New in Python 3.4.0 release candidate 2? -=============================================== - -Release date: 2014-02-23 - -Core and Builtins ------------------ - -- Issue #20625: Parameter names in __annotations__ were not mangled properly. - Discovered by Jonas Wielicki, patch by Yury Selivanov. - -- Issue #20261: In pickle, lookup __getnewargs__ and __getnewargs_ex__ on the - type of the object. - -- Issue #20619: Give the AST nodes of keyword-only arguments a column and line - number. - -- Issue #20526: Revert changes of issue #19466 which introduces a regression: - don't clear anymore the state of Python threads early during the Python - shutdown. - -Library -------- - -- Issue #20710: The pydoc summary line no longer displays the "self" parameter - for bound methods. - -- Issue #20566: Change asyncio.as_completed() to use a Queue, to - avoid O(N**2) behavior. - -- Issue #20704: Implement new debug API in asyncio. Add new methods - BaseEventLoop.set_debug() and BaseEventLoop.get_debug(). - Add support for setting 'asyncio.tasks._DEBUG' variable with - 'PYTHONASYNCIODEBUG' environment variable. - -- asyncio: Refactoring and fixes: BaseEventLoop.sock_connect() raises an - error if the address is not resolved; use __slots__ in Handle and - TimerHandle; as_completed() and wait() raise TypeError if the passed - list of Futures is a single Future; call_soon() and other 'call_*()' - functions raise TypeError if the passed callback is a coroutine - function; _ProactorBasePipeTransport uses _FlowControlMixin; - WriteTransport.set_write_buffer_size() calls _maybe_pause_protocol() - to consider pausing receiving if the watermark limits have changed; - fix _check_resolved_address() for IPv6 address; and other minor - improvements, along with multiple documentation updates. - -- Issue #20684: Fix inspect.getfullargspec() to not to follow __wrapped__ - chains. Make its behaviour consistent with bound methods first argument. - Patch by Nick Coghlan and Yury Selivanov. - -- Issue #20681: Add new error handling API in asyncio. New APIs: - loop.set_exception_handler(), loop.default_exception_handler(), and - loop.call_exception_handler(). - -- Issue #20673: Implement support for UNIX Domain Sockets in asyncio. - New APIs: loop.create_unix_connection(), loop.create_unix_server(), - streams.open_unix_connection(), and streams.start_unix_server(). - -- Issue #20616: Add a format() method to tracemalloc.Traceback. - -- Issue #19744: the ensurepip installation step now just prints a warning to - stderr rather than failing outright if SSL/TLS is unavailable. This allows - local installation of POSIX builds without SSL/TLS support. - -- Issue #20594: Avoid name clash with the libc function posix_close. - -Build ------ - -- Issue #20641: Run MSI custom actions (pip installation, pyc compilation) - with the NoImpersonate flag, to support elevated execution (UAC). - -- Issue #20221: Removed conflicting (or circular) hypot definition when - compiled with VS 2010 or above. Initial patch by Tabrez Mohammed. - -- Issue #20609: Restored the ability to build 64-bit Windows binaries on - 32-bit Windows, which was broken by the change in issue #19788. - - -What's New in Python 3.4.0 release candidate 1? -=============================================== - -Release date: 2014-02-10 - -Core and Builtins ------------------ - -- Issue #19255: The builtins module is restored to initial value before - cleaning other modules. The sys and builtins modules are cleaned last. - -- Issue #20588: Make Python-ast.c C89 compliant. - -- Issue #20437: Fixed 22 potential bugs when deleting object references. - -- Issue #20500: Displaying an exception at interpreter shutdown no longer - risks triggering an assertion failure in PyObject_Str. - -- Issue #20538: UTF-7 incremental decoder produced inconsistent string when - input was truncated in BASE64 section. - -- Issue #20404: io.TextIOWrapper (and hence the open() builtin) now uses the - internal codec marking system added for issue #19619 to throw LookupError - for known non-text encodings at stream construction time. The existing - output type checks remain in place to deal with unmarked third party - codecs. - -- Issue #17162: Add PyType_GetSlot. - -- Issue #20162: Fix an alignment issue in the siphash24() hash function which - caused a crash on PowerPC 64-bit (ppc64). - -Library -------- - -- Issue #20530: The signatures for slot builtins have been updated - to reflect the fact that they only accept positional-only arguments. - -- Issue #20517: Functions in the os module that accept two filenames - now register both filenames in the exception on failure. - -- Issue #20563: The ipaddress module API is now considered stable. - -- Issue #14983: email.generator now always adds a line end after each MIME - boundary marker, instead of doing so only when there is an epilogue. This - fixes an RFC compliance bug and solves an issue with signed MIME parts. - -- Issue #20540: Fix a performance regression (vs. Python 3.2) when layering - a multiprocessing Connection over a TCP socket. For small payloads, Nagle's - algorithm would introduce idle delays before the entire transmission of a - message. - -- Issue #16983: the new email header parsing code will now decode encoded words - that are (incorrectly) surrounded by quotes, and register a defect. - -- Issue #19772: email.generator no longer mutates the message object when - doing a down-transform from 8bit to 7bit CTEs. - -- Issue #20536: the statistics module now correctly handle Decimal instances - with positive exponents - -- Issue #18805: the netmask/hostmask parsing in ipaddress now more reliably - filters out illegal values and correctly allows any valid prefix length. - -- Issue #20481: For at least Python 3.4, the statistics module will require - that all inputs for a single operation be of a single consistent type, or - else a mixed of ints and a single other consistent type. This avoids - some interoperability issues that arose with the previous approach of - coercing to a suitable common type. - -- Issue #20478: the statistics module now treats collections.Counter inputs - like any other iterable. - -- Issue #17369: get_filename was raising an exception if the filename - parameter's RFC2231 encoding was broken in certain ways. This was - a regression relative to python2. - -- Issue #20013: Some imap servers disconnect if the current mailbox is - deleted, and imaplib did not handle that case gracefully. Now it - handles the 'bye' correctly. - -- Issue #20531: Revert 3.4 version of fix for #19063, and apply the 3.3 - version. That is, do *not* raise an error if unicode is passed to - email.message.Message.set_payload. - -- Issue #20476: If a non-compat32 policy is used with any of the email parsers, - EmailMessage is now used as the factory class. The factory class should - really come from the policy; that will get fixed in 3.5. - -- Issue #19920: TarFile.list() no longer fails when outputs a listing - containing non-encodable characters. Based on patch by Vajrasky Kok. - -- Issue #20515: Fix NULL pointer dereference introduced by issue #20368. - -- Issue #19186: Restore namespacing of expat symbols inside the pyexpat module. - -- Issue #20053: ensurepip (and hence venv) are no longer affected by the - settings in the default pip configuration file. - -- Issue #20426: When passing the re.DEBUG flag, re.compile() displays the - debug output every time it is called, regardless of the compilation cache. - -- Issue #20368: The null character now correctly passed from Tcl to Python. - Improved error handling in variables-related commands. - -- Issue #20435: Fix _pyio.StringIO.getvalue() to take into account newline - translation settings. - -- tracemalloc: Fix slicing traces and fix slicing a traceback. - -- Issue #20354: Fix an alignment issue in the tracemalloc module on 64-bit - platforms. Bug seen on 64-bit Linux when using "make profile-opt". - -- Issue #17159: inspect.signature now accepts duck types of functions, - which adds support for Cython functions. Initial patch by Stefan Behnel. - -- Issue #18801: Fix inspect.classify_class_attrs to correctly classify - object.__new__ and object.__init__. - -- Fixed cmath.isinf's name in its argument parsing code. - -- Issue #20311, #20452: poll and epoll now round the timeout away from zero, - instead of rounding towards zero, in select and selectors modules: - select.epoll.poll(), selectors.PollSelector.poll() and - selectors.EpollSelector.poll(). For example, a timeout of one microsecond - (1e-6) is now rounded to one millisecondi (1e-3), instead of being rounded to - zero. However, the granularity property and asyncio's resolution feature - were removed again. - -- asyncio: Some refactoring; various fixes; add write flow control to - unix pipes; Future.set_exception() instantiates the exception - argument if it is a class; improved proactor pipe transport; support - wait_for(f, None); don't log broken/disconnected pipes; use - ValueError instead of assert for forbidden subprocess_{shell,exec} - arguments; added a convenience API for subprocess management; added - StreamReader.at_eof(); properly handle duplicate coroutines/futures - in gather(), wait(), as_completed(); use a bytearray for buffering - in StreamReader; and more. - -- Issue #20288: fix handling of invalid numeric charrefs in HTMLParser. - -- Issue #20424: Python implementation of io.StringIO now supports lone surrogates. - -- Issue #20308: inspect.signature now works on classes without user-defined - __init__ or __new__ methods. - -- Issue #20372: inspect.getfile (and a bunch of other inspect functions that - use it) doesn't crash with unexpected AttributeError on classes defined in C - without __module__. - -- Issue #20356: inspect.signature formatting uses '/' to separate - positional-only parameters from others. - -- Issue #20223: inspect.signature now supports methods defined with - functools.partialmethods. - -- Issue #19456: ntpath.join() now joins relative paths correctly when a drive - is present. - -- Issue #19077: tempfile.TemporaryDirectory cleanup no longer fails when - called during shutdown. Emitting resource warning in __del__ no longer fails. - Original patch by Antoine Pitrou. - -- Issue #20394: Silence Coverity warning in audioop module. - -- Issue #20367: Fix behavior of concurrent.futures.as_completed() for - duplicate arguments. Patch by Glenn Langford. - -- Issue #8260: The read(), readline() and readlines() methods of - codecs.StreamReader returned incomplete data when were called after - readline() or read(size). Based on patch by Amaury Forgeot d'Arc. - -- Issue #20105: the codec exception chaining now correctly sets the - traceback of the original exception as its __traceback__ attribute. - -- Issue #17481: inspect.getfullargspec() now uses inspect.signature() API. - -- Issue #15304: concurrent.futures.wait() can block forever even if - Futures have completed. Patch by Glenn Langford. - -- Issue #14455: plistlib: fix serializing integers in the range - of an unsigned long long but outside of the range of signed long long for - binary plist files. - -IDLE ----- - -- Issue #20406: Use Python application icons for Idle window title bars. - Patch mostly by Serhiy Storchaka. - -- Update the python.gif icon for the Idle classbrowser and pathbowser - from the old green snake to the new blue and yellow snakes. - -- Issue #17721: Remove non-functional configuration dialog help button until we - make it actually gives some help when clicked. Patch by Guilherme Simões. - -Tests ------ - -- Issue #20532: Tests which use _testcapi now are marked as CPython only. - -- Issue #19920: Added tests for TarFile.list(). Based on patch by Vajrasky Kok. - -- Issue #19990: Added tests for the imghdr module. Based on patch by - Claudiu Popa. - -- Issue #20474: Fix test_socket "unexpected success" failures on OS X 10.7+. - -Tools/Demos ------------ - -- Issue #20530: Argument Clinic's signature format has been revised again. - The new syntax is highly human readable while still preventing false - positives. The syntax also extends Python syntax to denote "self" and - positional-only parameters, allowing inspect.Signature objects to be - totally accurate for all supported builtins in Python 3.4. - -- Issue #20456: Argument Clinic now observes the C preprocessor conditional - compilation statements of the C files it parses. When a Clinic block is - inside a conditional code, it adjusts its output to match, including - automatically generating an empty methoddef macro. - -- Issue #20456: Cloned functions in Argument Clinic now use the correct - name, not the name of the function they were cloned from, for text - strings inside generated code. - -- Issue #20456: Fixed Argument Clinic's test suite and "--converters" feature. - -- Issue #20456: Argument Clinic now allows specifying different names - for a parameter in Python and C, using "as" on the parameter line. - -- Issue #20326: Argument Clinic now uses a simple, unique signature to - annotate text signatures in docstrings, resulting in fewer false - positives. "self" parameters are also explicitly marked, allowing - inspect.Signature() to authoritatively detect (and skip) said parameters. - -- Issue #20326: Argument Clinic now generates separate checksums for the - input and output sections of the block, allowing external tools to verify - that the input has not changed (and thus the output is not out-of-date). - -Build ------ - -- Issue #20465: Update SQLite shipped with OS X installer to 3.8.3. - -C-API ------ - -- Issue #20517: Added new functions allowing OSError exceptions to reference - two filenames instead of one: PyErr_SetFromErrnoWithFilenameObjects() and - PyErr_SetExcFromWindowsErrWithFilenameObjects(). - -Documentation -------------- - -- Issue #20488: Change wording to say importlib is *the* implementation of - import instead of just *an* implementation. - -- Issue #6386: Clarify in the tutorial that specifying a symlink to execute - means the directory containing the executed script and not the symlink is - added to sys.path. - - -What's New in Python 3.4.0 Beta 3? -================================== - -Release date: 2014-01-26 - -Core and Builtins ------------------ - -- Issue #20189: Four additional builtin types (PyTypeObject, - PyMethodDescr_Type, _PyMethodWrapper_Type, and PyWrapperDescr_Type) - have been modified to provide introspection information for builtins. - -- Issue #17825: Cursor "^" is correctly positioned for SyntaxError and - IndentationError. - -- Issue #2382: SyntaxError cursor "^" is now written at correct position in most - cases when multibyte characters are in line (before "^"). This still not - works correctly with wide East Asian characters. - -- Issue #18960: The first line of Python script could be executed twice when - the source encoding was specified on the second line. Now the source encoding - declaration on the second line isn't effective if the first line contains - anything except a comment. 'python -x' works now again with files with the - source encoding declarations, and can be used to make Python batch files - on Windows. - -Library -------- - -- asyncio: Various improvements and small changes not all covered by - issues listed below. E.g. wait_for() now cancels the inner task if - the timeout occcurs; tweaked the set of exported symbols; renamed - Empty/Full to QueueEmpty/QueueFull; "with (yield from lock)" now - uses a separate context manager; readexactly() raises if not enough - data was read; PTY support tweaks. - -- Issue #20311: asyncio: Add a granularity attribute to BaseEventLoop: maximum - between the resolution of the BaseEventLoop.time() method and the resolution - of the selector. The granuarility is used in the scheduler to round time and - deadline. - -- Issue #20311: selectors: Add a resolution attribute to BaseSelector. - -- Issue #20189: unittest.mock now no longer assumes that any object for - which it could get an inspect.Signature is a callable written in Python. - Fix courtesy of Michael Foord. - -- Issue #20317: ExitStack.__exit__ could create a self-referential loop if an - exception raised by a cleanup operation already had its context set - correctly (for example, by the @contextmanager decorator). The infinite - loop this caused is now avoided by checking if the expected context is - already set before trying to fix it. - -- Issue #20374: Fix build with GNU readline >= 6.3. - -- Issue #20262: Warnings are raised now when duplicate names are added in the - ZIP file or too long ZIP file comment is truncated. - -- Issue #20165: The unittest module no longer considers tests marked with - @expectedFailure successful if they pass. - -- Issue #18574: Added missing newline in 100-Continue reply from - http.server.BaseHTTPRequestHandler. Patch by Nikolaus Rath. - -- Issue #20270: urllib.urlparse now supports empty ports. - -- Issue #20243: TarFile no longer raise ReadError when opened in write mode. - -- Issue #20238: TarFile opened with external fileobj and "w:gz" mode didn't - write complete output on close. - -- Issue #20245: The open functions in the tarfile module now correctly handle - empty mode. - -- Issue #20242: Fixed basicConfig() format strings for the alternative - formatting styles. Thanks to kespindler for the bug report and patch. - -- Issue #20246: Fix buffer overflow in socket.recvfrom_into. - -- Issues #20206 and #5803: Fix edge case in email.quoprimime.encode where it - truncated lines ending in a character needing encoding but no newline by - using a more efficient algorithm that doesn't have the bug. - -- Issue #19082: Working xmlrpc.server and xmlrpc.client examples. Both in - modules and in documentation. Initial patch contributed by Vajrasky Kok. - -- Issue #20138: The wsgiref.application_uri() and wsgiref.request_uri() - functions now conform to PEP 3333 when handle non-ASCII URLs. - -- Issue #19097: Raise the correct Exception when cgi.FieldStorage is given an - invalid fileobj. - -- Issue #20152: Ported Python/import.c over to Argument Clinic. - -- Issue #13107: argparse and optparse no longer raises an exception when output - a help on environment with too small COLUMNS. Based on patch by - Elazar Gershuni. - -- Issue #20207: Always disable SSLv2 except when PROTOCOL_SSLv2 is explicitly - asked for. - -- Issue #18960: The tokenize module now ignore the source encoding declaration - on the second line if the first line contains anything except a comment. - -- Issue #20078: Reading malformed zipfiles no longer hangs with 100% CPU - consumption. - -- Issue #20113: os.readv() and os.writev() now raise an OSError exception on - error instead of returning -1. - -- Issue #19719: Make importlib.abc.MetaPathFinder.find_module(), - PathEntryFinder.find_loader(), and Loader.load_module() use PEP 451 APIs to - help with backwards-compatibility. - -- Issue #20144: inspect.Signature now supports parsing simple symbolic - constants as parameter default values in __text_signature__. - -- Issue #20072: Fixed multiple errors in tkinter with wantobjects is False. - -- Issue #20229: Avoid plistlib deprecation warning in platform.mac_ver(). - -- Issue #14455: Fix some problems with the new binary plist support in plistlib. - -IDLE ----- - -- Issue #17390: Add Python version to Idle editor window title bar. - Original patches by Edmond Burnett and Kent Johnson. - -- Issue #18960: IDLE now ignores the source encoding declaration on the second - line if the first line contains anything except a comment. - -Tests ------ - -- Issue #20358: Tests for curses.window.overlay and curses.window.overwrite - no longer specify min{row,col} > max{row,col}. - -- Issue #19804: The test_find_mac test in test_uuid is now skipped if the - ifconfig executable is not available. - -- Issue #19886: Use better estimated memory requirements for bigmem tests. - -Tools/Demos ------------ - -- Issue #20390: Argument Clinic's "file" output preset now defaults to - "{dirname}/clinic/{basename}.h". - -- Issue #20390: Argument Clinic's "class" directive syntax has been extended - with two new required arguments: "typedef" and "type_object". - -- Issue #20390: Argument Clinic: If __new__ or __init__ functions didn't use - kwargs (or args), the PyArg_NoKeywords (or PyArg_NoPositional) calls - generated are only run when the type object is an exact match. - -- Issue #20390: Argument Clinic now fails if you have required parameters after - optional parameters. - -- Issue #20390: Argument Clinic converters now have a new template they can - inject code into: "modifiers". Code put there is run in the parsing - function after argument parsing but before the call to the impl. - -- Issue #20376: Argument Clinic now escapes backslashes in docstrings. - -- Issue #20381: Argument Clinic now sanity checks the default argument when - c_default is also specified, providing a nice failure message for - disallowed values. - -- Issue #20189: Argument Clinic now ensures that parser functions for - __new__ are always of type newfunc, the type of the tp_new slot. - Similarly, parser functions for __init__ are now always of type initproc, - the type of tp_init. - -- Issue #20189: Argument Clinic now suppresses the docstring for __new__ - and __init__ functions if no docstring is provided in the input. - -- Issue #20189: Argument Clinic now suppresses the "self" parameter in the - impl for @staticmethod functions. - -- Issue #20294: Argument Clinic now supports argument parsing for __new__ and - __init__ functions. - -- Issue #20299: Argument Clinic custom converters may now change the default - value of c_default and py_default with a class member. - -- Issue #20287: Argument Clinic's output is now configurable, allowing - delaying its output or even redirecting it to a separate file. - -- Issue #20226: Argument Clinic now permits simple expressions - (e.g. "sys.maxsize - 1") as default values for parameters. - -- Issue #19936: Added executable bits or shebang lines to Python scripts which - requires them. Disable executable bits and shebang lines in test and - benchmark files in order to prevent using a random system python, and in - source files of modules which don't provide command line interface. Fixed - shebang lines in the unittestgui and checkpip scripts. - -- Issue #20268: Argument Clinic now supports cloning the parameters and - return converter of existing functions. - -- Issue #20228: Argument Clinic now has special support for class special - methods. - -- Issue #20214: Fixed a number of small issues and documentation errors in - Argument Clinic (see issue for details). - -- Issue #20196: Fixed a bug where Argument Clinic did not generate correct - parsing code for functions with positional-only parameters where all arguments - are optional. - -- Issue #18960: 2to3 and the findnocoding.py script now ignore the source - encoding declaration on the second line if the first line contains anything - except a comment. - -- Issue #19723: The marker comments Argument Clinic uses have been changed - to improve readability. - -- Issue #20157: When Argument Clinic renames a parameter because its name - collides with a C keyword, it no longer exposes that rename to PyArg_Parse. - -- Issue #20141: Improved Argument Clinic's support for the PyArg_Parse "O!" - format unit. - -- Issue #20144: Argument Clinic now supports simple symbolic constants - as parameter default values. - -- Issue #20143: The line numbers reported in Argument Clinic errors are - now more accurate. - -- Issue #20142: Py_buffer variables generated by Argument Clinic are now - initialized with a default value. - -Build ------ - -- Issue #12837: Silence a tautological comparison warning on OS X under Clang in - socketmodule.c. - - -What's New in Python 3.4.0 Beta 2? -================================== - -Release date: 2014-01-05 - -Core and Builtins ------------------ - -- Issue #17432: Drop UCS2 from names of Unicode functions in python3.def. - -- Issue #19526: Exclude all new API from the stable ABI. Exceptions can be - made if a need is demonstrated. - -- Issue #19969: PyBytes_FromFormatV() now raises an OverflowError if "%c" - argument is not in range [0; 255]. - -- Issue #19995: %c, %o, %x, and %X now issue a DeprecationWarning on non-integer - input; reworded docs to clarify that an integer type should define both __int__ - and __index__. - -- Issue #19787: PyThread_set_key_value() now always set the value. In Python - 3.3, the function did nothing if the key already exists (if the current value - is a non-NULL pointer). - -- Issue #14432: Remove the thread state field from the frame structure. Fix a - crash when a generator is created in a C thread that is destroyed while the - generator is still used. The issue was that a generator contains a frame, and - the frame kept a reference to the Python state of the destroyed C thread. The - crash occurs when a trace function is setup. - -- Issue #19576: PyGILState_Ensure() now initializes threads. At startup, Python - has no concrete GIL. If PyGILState_Ensure() is called from a new thread for - the first time and PyEval_InitThreads() was not called yet, a GIL needs to be - created. - -- Issue #17576: Deprecation warning emitted now when __int__() or __index__() - return not int instance. - -- Issue #19932: Fix typo in import.h, missing whitespaces in function prototypes. - -- Issue #19736: Add module-level statvfs constants defined for GNU/glibc - based systems. - -- Issue #20097: Fix bad use of "self" in importlib's WindowsRegistryFinder. - -- Issue #19729: In str.format(), fix recursive expansion in format spec. - -- Issue #19638: Fix possible crash / undefined behaviour from huge (more than 2 - billion characters) input strings in _Py_dg_strtod. - -Library -------- - -- Issue #20154: Deadlock in asyncio.StreamReader.readexactly(). - -- Issue #16113: Remove sha3 module again. - -- Issue #20111: pathlib.Path.with_suffix() now sanity checks the given suffix. - -- Fix breakage in TestSuite.countTestCases() introduced by issue #11798. - -- Issue #20108: Avoid parameter name clash in inspect.getcallargs(). - -- Issue #19918: Fix PurePath.relative_to() under Windows. - -- Issue #19422: Explicitly disallow non-SOCK_STREAM sockets in the ssl - module, rather than silently let them emit clear text data. - -- Issue #20046: Locale alias table no longer contains entities which can be - calculated. Generalized support of the euro modifier. - -- Issue #20027: Fixed locale aliases for devanagari locales. - -- Issue #20067: Tkinter variables now work when wantobjects is false. - -- Issue #19020: Tkinter now uses splitlist() instead of split() in configure - methods. - -- Issue #19744: ensurepip now provides a better error message when Python is - built without SSL/TLS support (pip currently requires that support to run, - even if only operating with local wheel files) - -- Issue #19734: ensurepip now ignores all pip environment variables to avoid - odd behaviour based on user configuration settings - -- Fix TypeError on "setup.py upload --show-response". - -- Issue #20045: Fix "setup.py register --list-classifiers". - -- Issue #18879: When a method is looked up on a temporary file, avoid closing - the file before the method is possibly called. - -- Issue #20037: Avoid crashes when opening a text file late at interpreter - shutdown. - -- Issue #19967: Thanks to the PEP 442, asyncio.Future now uses a - destructor to log uncaught exceptions, instead of the dedicated - _TracebackLogger class. - -- Added a Task.current_task() class method to asyncio. - -- Issue #19850: Set SA_RESTART in asyncio when registering a signal - handler to limit EINTR occurrences. - -- Implemented write flow control in asyncio for proactor event loop (Windows). - -- Change write buffer in asyncio use to avoid O(N**2) behavior. Make - write()/sendto() accept bytearray/memoryview. - -- Issue #20034: Updated alias mapping to most recent locale.alias file - from X.org distribution using makelocalealias.py. - -- Issue #5815: Fixed support for locales with modifiers. Fixed support for - locale encodings with hyphens. - -- Issue #20026: Fix the sqlite module to handle correctly invalid isolation - level (wrong type). - -- Issue #18829: csv.Dialect() now checks type for delimiter, escapechar and - quotechar fields. Original patch by Vajrasky Kok. - -- Issue #19855: uuid.getnode() on Unix now looks on the PATH for the - executables used to find the mac address, with /sbin and /usr/sbin as - fallbacks. - -- Issue #20007: HTTPResponse.read(0) no more prematurely closes connection. - Original patch by Simon Sapin. - -- Issue #19946: multiprocessing now uses runpy to initialize __main__ in - child processes when necessary, allowing it to correctly handle scripts - without suffixes and submodules that use explicit relative imports or - otherwise rely on parent modules being correctly imported prior to - execution. - -- Issue #19921: When Path.mkdir() is called with parents=True, any missing - parent is created with the default permissions, ignoring the mode argument - (mimicking the POSIX "mkdir -p" command). - -- Issue #19887: Improve the Path.resolve() algorithm to support certain - symlink chains. - -- Issue #19912: Fixed numerous bugs in ntpath.splitunc(). - -- Issue #19911: ntpath.splitdrive() now correctly processes the 'İ' character - (U+0130, LATIN CAPITAL LETTER I WITH DOT ABOVE). - -- Issue #19532: python -m compileall with no filename/directory arguments now - respects the -f and -q flags instead of ignoring them. - -- Issue #19623: Fixed writing to unseekable files in the aifc module. - -- Issue #19946: multiprocessing.spawn now raises ImportError when the module to - be used as the main module cannot be imported. - -- Issue #17919: select.poll.register() again works with poll.POLLNVAL on AIX. - Fixed integer overflow in the eventmask parameter. - -- Issue #19063: if a Charset's body_encoding was set to None, the email - package would generate a message claiming the Content-Transfer-Encoding - was 7bit, and produce garbage output for the content. This now works. - A couple of other set_payload mishandlings of non-ASCII are also fixed. - In addition, calling set_payload with a string argument without - specifying a charset now raises an error (this is a new error in 3.4). - -- Issue #15475: Add __sizeof__ implementations for itertools objects. - -- Issue #19944: Fix importlib.find_spec() so it imports parents as needed - and move the function to importlib.util. - -- Issue #19880: Fix a reference leak in unittest.TestCase. Explicitly break - reference cycles between frames and the _Outcome instance. - -- Issue #17429: platform.linux_distribution() now decodes files from the UTF-8 - encoding with the surrogateescape error handler, instead of decoding from the - locale encoding in strict mode. It fixes the function on Fedora 19 which is - probably the first major distribution release with a non-ASCII name. Patch - written by Toshio Kuratomi. - -- Issue #19343: Expose FreeBSD-specific APIs in resource module. Original - patch by Koobs. - -- Issue #19929: Call os.read with 32768 within subprocess.Popen.communicate - rather than 4096 for efficiency. A microbenchmark shows Linux and OS X - both using ~50% less cpu time this way. - -- Issue #19506: Use a memoryview to avoid a data copy when piping data - to stdin within subprocess.Popen.communicate. 5-10% less cpu usage. - -- Issue #19876: selectors unregister() no longer raises ValueError or OSError - if the FD is closed (as long as it was registered). - -- Issue #19908: pathlib now joins relative Windows paths correctly when a drive - is present. Original patch by Antoine Pitrou. - -- Issue #19296: Silence compiler warning in dbm_open - -- Issue #6784: Strings from Python 2 can now be unpickled as bytes - objects by setting the encoding argument of Unpickler to be 'bytes'. - Initial patch by Merlijn van Deen. - -- Issue #19839: Fix regression in bz2 module's handling of non-bzip2 data at - EOF, and analogous bug in lzma module. - -- Issue #19881: Fix pickling bug where cpickle would emit bad pickle data for - large bytes string (i.e., with size greater than 2**32-1). - -- Issue #19138: doctest's IGNORE_EXCEPTION_DETAIL now allows a match when - no exception detail exists (no colon following the exception's name, or - a colon does follow but no text follows the colon). - -- Issue #19927: Add __eq__ to path-based loaders in importlib. - -- Issue #19827: On UNIX, setblocking() and settimeout() methods of - socket.socket can now avoid a second syscall if the ioctl() function can be - used, or if the non-blocking flag of the socket is unchanged. - -- Issue #19785: smtplib now supports SSLContext.check_hostname and server name - indication for TLS/SSL connections. - -- Issue #19784: poplib now supports SSLContext.check_hostname and server name - indication for TLS/SSL connections. - -- Issue #19783: nntplib now supports SSLContext.check_hostname and server name - indication for TLS/SSL connections. - -- Issue #19782: imaplib now supports SSLContext.check_hostname and server name - indication for TLS/SSL connections. - -- Issue #20123: Fix pydoc.synopsis() for "binary" modules. - -- Issue #19834: Support unpickling of exceptions pickled by Python 2. - -- Issue #19781: ftplib now supports SSLContext.check_hostname and server name - indication for TLS/SSL connections. - -- Issue #19509: Add SSLContext.check_hostname to match the peer's certificate - with server_hostname on handshake. - -- Issue #15798: Fixed subprocess.Popen() to no longer fail if file - descriptor 0, 1 or 2 is closed. - -- Issue #17897: Optimized unpickle prefetching. - -- Issue #3693: Make the error message more helpful when the array.array() - constructor is given a str. Move the array module typecode documentation to - the docstring of the constructor. - -- Issue #19088: Fixed incorrect caching of the copyreg module in - object.__reduce__() and object.__reduce_ex__(). - -- Issue #19698: Removed exec_module() methods from - importlib.machinery.BuiltinImporter and ExtensionFileLoader. - -- Issue #18864: Added a setter for ModuleSpec.has_location. - -- Fixed _pickle.Unpickler to not fail when loading empty strings as - persistent IDs. - -- Issue #11480: Fixed copy.copy to work with classes with custom metaclasses. - Patch by Daniel Urban. - -- Issue #6477: Added support for pickling the types of built-in singletons - (i.e., Ellipsis, NotImplemented, None). - -- Issue #19713: Add remaining PEP 451-related deprecations and move away - from using find_module/find_loaer/load_module. - -- Issue #19708: Update pkgutil to use the new importer APIs. - -- Issue #19703: Update pydoc to use the new importer APIs. - -- Issue #19851: Fixed a regression in reloading sub-modules. - -- ssl.create_default_context() sets OP_NO_COMPRESSION to prevent CRIME. - -- Issue #19802: Add socket.SO_PRIORITY. - -- Issue #11508: Fixed uuid.getnode() and uuid.uuid1() on environment with - virtual interface. Original patch by Kent Frazier. - -- Issue #11489: JSON decoder now accepts lone surrogates. - -- Issue #19545: Avoid chained exceptions while passing stray % to - time.strptime(). Initial patch by Claudiu Popa. - -IDLE ----- - -- Issue #20058: sys.stdin.readline() in IDLE now always returns only one line. - -- Issue #19481: print() of string subclass instance in IDLE no longer hangs. - -- Issue #18270: Prevent possible IDLE AttributeError on OS X when no initial - shell window is present. - -Tests ------ - -- Issue #20055: Fix test_shutil under Windows with symlink privileges held. - Patch by Vajrasky Kok. - -- Issue #20070: Don't run test_urllib2net when network resources are not - enabled. - -- Issue #19938: Re-enabled test_bug_1333982 in test_dis, which had been - disabled since 3.0 due to the changes in listcomp handling. - -- Issue #19320: test_tcl no longer fails when wantobjects is false. - -- Issue #19919: Fix flaky SSL test. connect_ex() sometimes returns - EWOULDBLOCK on Windows or VMs hosted on Windows. - -- Issue #19912: Added tests for ntpath.splitunc(). - -- Issue #19828: Fixed test_site when the whole suite is run with -S. - -- Issue #19928: Implemented a test for repr() of cell objects. - -- Issue #19535: Fixed test_docxmlrpc, test_functools, test_inspect, and - test_statistics when python is run with -OO. - -- Issue #19926: Removed unneeded test_main from test_abstract_numbers. - Patch by Vajrasky Kok. - -- Issue #19572: More skipped tests explicitly marked as skipped. - -- Issue #19595, #19987: Re-enabled a long-disabled test in test_winsound. - -- Issue #19588: Fixed tests in test_random that were silently skipped most - of the time. Patch by Julian Gindi. - -Build ------ - -- Issue #19728: Enable pip installation by default on Windows. - -- Issue #16136: Remove VMS support - -- Issue #18215: Add script Tools/ssl/test_multiple_versions.py to compile and - run Python's unit tests with multiple versions of OpenSSL. - -- Issue #19922: define _INCLUDE__STDC_A1_SOURCE in HP-UX to include mbstate_t - for mbrtowc(). - -- Issue #19788: kill_python(_d).exe is now run as a PreBuildEvent on the - pythoncore sub-project. This should prevent build errors due a previous - build's python(_d).exe still running. - -Documentation -------------- - -- Issue #20265: Updated some parts of the Using Windows document. - -- Issue #20266: Updated some parts of the Windows FAQ. - -- Issue #20255: Updated the about and bugs pages. - -- Issue #20253: Fixed a typo in the ipaddress docs that advertised an - illegal attribute name. Found by INADA Naoki. - -- Issue #18840: Introduce the json module in the tutorial, and de-emphasize - the pickle module. - -- Issue #19845: Updated the Compiling Python on Windows section. - -- Issue #19795: Improved markup of True/False constants. - -Tools/Demos ------------ - -- Issue #19659: Added documentation for Argument Clinic. - -- Issue #19976: Argument Clinic METH_NOARGS functions now always - take two parameters. - - -What's New in Python 3.4.0 Beta 1? -================================== - -Release date: 2013-11-24 - -Core and Builtins ------------------ - -- Use the repr of a module name in more places in import, especially - exceptions. - -- Issue #19619: str.encode, bytes.decode and bytearray.decode now use an - internal API to throw LookupError for known non-text encodings, rather - than attempting the encoding or decoding operation and then throwing a - TypeError for an unexpected output type. (The latter mechanism remains - in place for third party non-text encodings) - -- Issue #19183: Implement PEP 456 'secure and interchangeable hash algorithm'. - Python now uses SipHash24 on all major platforms. - -- Issue #12892: The utf-16* and utf-32* encoders no longer allow surrogate code - points (U+D800-U+DFFF) to be encoded. The utf-32* decoders no longer decode - byte sequences that correspond to surrogate code points. The surrogatepass - error handler now works with the utf-16* and utf-32* codecs. Based on - patches by Victor Stinner and Kang-Hao (Kenny) Lu. - -- Issue #17806: Added keyword-argument support for "tabsize" to - str/bytes.expandtabs(). - -- Issue #17828: Output type errors in str.encode(), bytes.decode() and - bytearray.decode() now direct users to codecs.encode() or codecs.decode() - as appropriate. - -- Issue #17828: The interpreter now attempts to chain errors that occur in - codec processing with a replacement exception of the same type that - includes the codec name in the error message. It ensures it only does this - when the creation of the replacement exception won't lose any information. - -- Issue #19466: Clear the frames of daemon threads earlier during the - Python shutdown to call object destructors. So "unclosed file" resource - warnings are now correctly emitted for daemon threads. - -- Issue #19514: Deduplicate some _Py_IDENTIFIER declarations. - Patch by Andrei Dorian Duma. - -- Issue #17936: Fix O(n**2) behaviour when adding or removing many subclasses - of a given type. - -- Issue #19428: zipimport now handles errors when reading truncated or invalid - ZIP archive. - -- Issue #18408: Add a new PyFrame_FastToLocalsWithError() function to handle - exceptions when merging fast locals into f_locals of a frame. - PyEval_GetLocals() now raises an exception and return NULL on failure. - -- Issue #19369: Optimized the usage of __length_hint__(). - -- Issue #18603: Ensure that PyOS_mystricmp and PyOS_mystrnicmp are in the - Python executable and not removed by the linker's optimizer. - -- Issue #19306: Add extra hints to the faulthandler module's stack - dumps that these are "upside down". - -Library -------- - -- Issue #3158: doctest can now find doctests in functions and methods - written in C. - -- Issue #13477: Added command line interface to the tarfile module. - Original patch by Berker Peksag. - -- Issue #19674: inspect.signature() now produces a correct signature - for some builtins. - -- Issue #19722: Added opcode.stack_effect(), which - computes the stack effect of bytecode instructions. - -- Issue #19735: Implement private function ssl._create_stdlib_context() to - create SSLContext objects in Python's stdlib module. It provides a single - configuration point and makes use of SSLContext.load_default_certs(). - -- Issue #16203: Add re.fullmatch() function and regex.fullmatch() method, - which anchor the pattern at both ends of the string to match. - Original patch by Matthew Barnett. - -- Issue #13592: Improved the repr for regular expression pattern objects. - Based on patch by Hugo Lopes Tavares. - -- Issue #19641: Added the audioop.byteswap() function to convert big-endian - samples to little-endian and vice versa. - -- Issue #15204: Deprecated the 'U' mode in file-like objects. - -- Issue #17810: Implement PEP 3154, pickle protocol 4. - -- Issue #19668: Added support for the cp1125 encoding. - -- Issue #19689: Add ssl.create_default_context() factory function. It creates - a new SSLContext object with secure default settings. - -- Issue #19727: os.utime(..., None) is now potentially more precise - under Windows. - -- Issue #17201: ZIP64 extensions now are enabled by default. Patch by - William Mallard. - -- Issue #19292: Add SSLContext.load_default_certs() to load default root CA - certificates from default stores or system stores. By default the method - loads CA certs for authentication of server certs. - -- Issue #19673: Add pathlib to the stdlib as a provisional module (PEP 428). - -- Issue #16596: pdb in a generator now properly skips over yield and - yield from rather than stepping out of the generator into its - caller. (This is essential for stepping through asyncio coroutines.) - -- Issue #17916: Added dis.Bytecode.from_traceback() and - dis.Bytecode.current_offset to easily display "current instruction" - markers in the new disassembly API (Patch by Claudiu Popa). - -- Issue #19552: venv now supports bootstrapping pip into virtual environments - -- Issue #17134: Finalize interface to Windows' certificate store. Cert and - CRL enumeration are now two functions. enum_certificates() also returns - purpose flags as set of OIDs. - -- Issue #19555: Restore sysconfig.get_config_var('SO'), (and the distutils - equivalent) with a DeprecationWarning pointing people at $EXT_SUFFIX. - -- Issue #8813: Add SSLContext.verify_flags to change the verification flags - of the context in order to enable certification revocation list (CRL) - checks or strict X509 rules. - -- Issue #18294: Fix the zlib module to make it 64-bit safe. - -- Issue #19682: Fix compatibility issue with old version of OpenSSL that - was introduced by Issue #18379. - -- Issue #14455: plistlib now supports binary plists and has an updated API. - -- Issue #19633: Fixed writing not compressed 16- and 32-bit wave files on - big-endian platforms. - -- Issue #18379: SSLSocket.getpeercert() returns CA issuer AIA fields, OCSP - and CRL distribution points. - -- Issue #18138: Implement cadata argument of SSLContext.load_verify_location() - to load CA certificates and CRL from memory. It supports PEM and DER - encoded strings. - -- Issue #18775: Add name and block_size attribute to HMAC object. They now - provide the same API elements as non-keyed cryptographic hash functions. - -- Issue #17276: MD5 as default digestmod for HMAC is deprecated. The HMAC - module supports digestmod names, e.g. hmac.HMAC('sha1'). - -- Issue #19449: in csv's writerow, handle non-string keys when generating the - error message that certain keys are not in the 'fieldnames' list. - -- Issue #13633: Added a new convert_charrefs keyword arg to HTMLParser that, - when True, automatically converts all character references. - -- Issue #2927: Added the unescape() function to the html module. - -- Issue #8402: Added the escape() function to the glob module. - -- Issue #17618: Add Base85 and Ascii85 encoding/decoding to the base64 module. - -- Issue #19634: time.strftime("%y") now raises a ValueError on AIX when given a - year before 1900. - -- Fix test.support.bind_port() to not cause an error when Python was compiled - on a system with SO_REUSEPORT defined in the headers but run on a system - with an OS kernel that does not support that reasonably new socket option. - -- Fix compilation error under gcc of the ctypes module bundled libffi for arm. - -- Issue #19448: Add private API to SSL module to lookup ASN.1 objects by OID, - NID, short name and long name. - -- Issue #19282: dbm.open now supports the context management protocol. - (Initial patch by Claudiu Popa) - -- Issue #8311: Added support for writing any bytes-like objects in the aifc, - sunau, and wave modules. - -- Issue #5202: Added support for unseekable files in the wave module. - -- Issue #19544 and Issue #1180: Restore global option to ignore - ~/.pydistutils.cfg in Distutils, accidentally removed in backout of - distutils2 changes. - -- Issue #19523: Closed FileHandler leak which occurred when delay was set. - -- Issue #19544 and Issue #6516: Restore support for --user and --group - parameters to sdist command accidentally rolled back as part of the - distutils2 rollback. - -- Issue #13674: Prevented time.strftime from crashing on Windows when given - a year before 1900 and a format of %y. - -- Issue #19406: implementation of the ensurepip module (part of PEP 453). - Patch by Donald Stufft and Nick Coghlan. - -- Issue #19544 and Issue #6286: Restore use of urllib over http allowing use - of http_proxy for Distutils upload command, a feature accidentally lost - in the rollback of distutils2. - -- Issue #19544 and Issue #7457: Restore the read_pkg_file method to - distutils.dist.DistributionMetadata accidentally removed in the undo of - distutils2. - -- Issue #16685: Added support for any bytes-like objects in the audioop module. - Removed support for strings. - -- Issue #7171: Add Windows implementation of ``inet_ntop`` and ``inet_pton`` - to socket module. Patch by Atsuo Ishimoto. - -- Issue #19261: Added support for writing 24-bit samples in the sunau module. - -- Issue #1097797: Added CP273 encoding, used on IBM mainframes in - Germany and Austria. Mapping provided by Michael Bierenfeld. - -- Issue #1575020: Fixed support of 24-bit wave files on big-endian platforms. - -- Issue #19378: Fixed a number of cases in the dis module where the new - "file" parameter was not being honoured correctly - -- Issue #19378: Removed the "dis.Bytecode.show_info" method - -- Issue #19378: Renamed the "dis.Bytecode.display_code" method to - "dis.Bytecode.dis" and converted it to returning a string rather than - printing output. - -- Issue #19378: the "line_offset" parameter in the new "dis.get_instructions" - API has been renamed to "first_line" (and the default value and usage - changed accordingly). This should reduce confusion with the more common use - of "offset" in the dis docs to refer to bytecode offsets. - -- Issue #18678: Corrected spwd struct member names in spwd module: - sp_nam->sp_namp, and sp_pwd->sp_pwdp. The old names are kept as extra - structseq members, for backward compatibility. - -- Issue #6157: Fixed tkinter.Text.debug(). tkinter.Text.bbox() now raises - TypeError instead of TclError on wrong number of arguments. Original patch - by Guilherme Polo. - -- Issue #10197: Rework subprocess.get[status]output to use subprocess - functionality and thus to work on Windows. Patch by Nick Coghlan - -- Issue #6160: The bbox() method of tkinter.Spinbox now returns a tuple of - integers instead of a string. Based on patch by Guilherme Polo. - -- Issue #19403: contextlib.redirect_stdout is now reentrant - -- Issue #19286: Directories in ``package_data`` are no longer added to - the filelist, preventing failure outlined in the ticket. - -- Issue #19480: HTMLParser now accepts all valid start-tag names as defined - by the HTML5 standard. - -- Issue #15114: The html.parser module now raises a DeprecationWarning when the - strict argument of HTMLParser or the HTMLParser.error method are used. - -- Issue #19410: Undo the special-casing removal of '' for - importlib.machinery.FileFinder. - -- Issue #19424: Fix the warnings module to accept filename containing surrogate - characters. - -- Issue #19435: Fix directory traversal attack on CGIHttpRequestHandler. - -- Issue #19227: Remove pthread_atfork() handler. The handler was added to - solve #18747 but has caused issues. - -- Issue #19420: Fix reference leak in module initialization code of - _hashopenssl.c - -- Issue #19329: Optimized compiling charsets in regular expressions. - -- Issue #19227: Try to fix deadlocks caused by re-seeding then OpenSSL - pseudo-random number generator on fork(). - -- Issue #16037: HTTPMessage.readheaders() raises an HTTPException when more than - 100 headers are read. Adapted from patch by Jyrki Pulliainen. - -- Issue #16040: CVE-2013-1752: nntplib: Limit maximum line lengths to 2048 to - prevent readline() calls from consuming too much memory. Patch by Jyrki - Pulliainen. - -- Issue #16041: CVE-2013-1752: poplib: Limit maximum line lengths to 2048 to - prevent readline() calls from consuming too much memory. Patch by Jyrki - Pulliainen. - -- Issue #17997: Change behavior of ``ssl.match_hostname()`` to follow RFC 6125, - for security reasons. It now doesn't match multiple wildcards nor wildcards - inside IDN fragments. - -- Issue #16039: CVE-2013-1752: Change use of readline in imaplib module to limit - line length. Patch by Emil Lind. - -- Issue #19330: the unnecessary wrapper functions have been removed from the - implementations of the new contextlib.redirect_stdout and - contextlib.suppress context managers, which also ensures they provide - reasonable help() output on instances - -- Issue #19393: Fix symtable.symtable function to not be confused when there are - functions or classes named "top". - -- Issue #18685: Restore re performance to pre-PEP 393 levels. - -- Issue #19339: telnetlib module is now using time.monotonic() when available - to compute timeout. - -- Issue #19399: fix sporadic test_subprocess failure. - -- Issue #13234: Fix os.listdir to work with extended paths on Windows. - Patch by Santoso Wijaya. - -- Issue #19375: The site module adding a "site-python" directory to sys.path, - if it exists, is now deprecated. - -- Issue #19379: Lazily import linecache in the warnings module, to make - startup with warnings faster until a warning gets printed. - -- Issue #19288: Fixed the "in" operator of dbm.gnu databases for string - argument. Original patch by Arfrever Frehtes Taifersar Arahesis. - -- Issue #19287: Fixed the "in" operator of dbm.ndbm databases for string - argument. Original patch by Arfrever Frehtes Taifersar Arahesis. - -- Issue #19327: Fixed the working of regular expressions with too big charset. - -- Issue #17400: New 'is_global' attribute for ipaddress to tell if an address - is allocated by IANA for global or private networks. - -- Issue #19350: Increasing the test coverage of macurl2path. Patch by Colin - Williams. - -- Issue #19365: Optimized the parsing of long replacement string in re.sub*() - functions. - -- Issue #19352: Fix unittest discovery when a module can be reached - through several paths (e.g. under Debian/Ubuntu with virtualenv). - -- Issue #15207: Fix mimetypes to read from correct part of Windows registry - Original patch by Dave Chambers - -- Issue #16595: Add prlimit() to resource module. - -- Issue #19324: Expose Linux-specific constants in resource module. - -- Load SSL's error strings in hashlib. - -- Issue #18527: Upgrade internal copy of zlib to 1.2.8. - -- Issue #19274: Add a filterfunc parameter to PyZipFile.writepy. - -- Issue #8964: fix platform._sys_version to handle IronPython 2.6+. - Patch by Martin Matusiak. - -- Issue #19413: Restore pre-3.3 reload() semantics of re-finding modules. - -- Issue #18958: Improve error message for json.load(s) while passing a string - that starts with a UTF-8 BOM. - -- Issue #19307: Improve error message for json.load(s) while passing objects - of the wrong type. - -- Issue #16038: CVE-2013-1752: ftplib: Limit amount of data read by - limiting the call to readline(). Original patch by Michał - Jastrzębski and Giampaolo Rodola. - -- Issue #17087: Improved the repr for regular expression match objects. - -Tests ------ - -- Issue #19664: test_userdict's repr test no longer depends on the order - of dict elements. - -- Issue #19440: Clean up test_capi by removing an unnecessary __future__ - import, converting from test_main to unittest.main, and running the - _testcapi module tests as subTests of a unittest TestCase method. - -- Issue #19378: the main dis module tests are now run with both stdout - redirection *and* passing an explicit file parameter - -- Issue #19378: removed the not-actually-helpful assertInstructionMatches - and assertBytecodeExactlyMatches helpers from bytecode_helper - -- Issue #18702: All skipped tests now reported as skipped. - -- Issue #19439: interpreter embedding tests are now executed on Windows - (Patch by Zachary Ware) - -- Issue #19085: Added basic tests for all tkinter widget options. - -- Issue #19384: Fix test_py_compile for root user, patch by Claudiu Popa. - -Documentation -------------- - -- Issue #18326: Clarify that list.sort's arguments are keyword-only. Also, - attempt to reduce confusion in the glossary by not saying there are - different "types" of arguments and parameters. - -Build ------ - -- Issue #19358: "make clinic" now runs the Argument Clinic preprocessor - over all CPython source files. - -- Update SQLite to 3.8.1, xz to 5.0.5, and Tcl/Tk to 8.6.1 on Windows. - -- Issue #16632: Enable DEP and ASLR on Windows. - -- Issue #17791: Drop PREFIX and EXEC_PREFIX definitions from PC/pyconfig.h - -- Add workaround for VS 2010 nmake clean issue. VS 2010 doesn't set up PATH - for nmake.exe correctly. - -- Issue #19550: Implement Windows installer changes of PEP 453 (ensurepip). - -- Issue #19520: Fix compiler warning in the _sha3 module on 32bit Windows. - -- Issue #19356: Avoid using a C variabled named "_self", it's a reserved - word in some C compilers. - -- Issue #15792: Correct build options on Win64. Patch by Jeremy Kloth. - -- Issue #19373: Apply upstream change to Tk 8.5.15 fixing OS X 10.9 - screen refresh problem for OS X installer build. - -- Issue #19649: On OS X, the same set of file names are now installed - in bin directories for all configurations: non-framework vs framework, - and single arch vs universal builds. pythonx.y-32 is now always - installed for 64-bit/32-bit universal builds. The obsolete and - undocumented pythonw* symlinks are no longer installed anywhere. - -- Issue #19553: PEP 453 - "make install" and "make altinstall" now install or - upgrade pip by default, using the bundled pip provided by the new ensurepip - module. A new configure option, --with-ensurepip[=upgrade|install|no], is - available to override the default ensurepip "--upgrade" option. The option - can also be set with "make [alt]install ENSUREPIP=[upgrade|install|no]". - -- Issue #19551: PEP 453 - the OS X installer now installs pip by default. - -- Update third-party libraries for OS X installers: xz 5.0.3 -> 5.0.5, - SQLite 3.7.13 -> 3.8.1 - -- Issue #15663: Revert OS X installer built-in Tcl/Tk support for 3.4.0b1. - Some third-party projects, such as Matplotlib and PIL/Pillow, - depended on being able to build with Tcl and Tk frameworks in - /Library/Frameworks. - -Tools/Demos ------------ - -- Issue #19730: Argument Clinic now supports all the existing PyArg - "format units" as legacy converters, as well as two new features: - "self converters" and the "version" directive. - -- Issue #19552: pyvenv now bootstraps pip into virtual environments by - default (pass --without-pip to request the old behaviour) - -- Issue #19390: Argument Clinic no longer accepts malformed Python - and C ids. - - -What's New in Python 3.4.0 Alpha 4? -=================================== - -Release date: 2013-10-20 - -Core and Builtins ------------------ - -- Issue #19301: Give classes and functions that are explicitly marked global a - global qualname. - -- Issue #19279: UTF-7 decoder no longer produces illegal strings. - -- Issue #16612: Add "Argument Clinic", a compile-time preprocessor for - C files to generate argument parsing code. (See PEP 436.) - -- Issue #18810: Shift stat calls in importlib.machinery.FileFinder such that - the code is optimistic that if something exists in a directory named exactly - like the possible package being searched for that it's in actuality a - directory. - -- Issue #18416: importlib.machinery.PathFinder now treats '' as the cwd and - importlib.machinery.FileFinder no longer special-cases '' to '.'. This leads - to modules imported from cwd to now possess an absolute file path for - __file__ (this does not affect modules specified by path on the CLI but it - does affect -m/runpy). It also allows FileFinder to be more consistent by not - having an edge case. - -- Issue #4555: All exported C symbols are now prefixed with either - "Py" or "_Py". - -- Issue #19219: Speed up marshal.loads(), and make pyc files slightly - (5% to 10%) smaller. - -- Issue #19221: Upgrade Unicode database to version 6.3.0. - -- Issue #16742: The result of the C callback PyOS_ReadlineFunctionPointer must - now be a string allocated by PyMem_RawMalloc() or PyMem_RawRealloc() (or NULL - if an error occurred), instead of a string allocated by PyMem_Malloc() or - PyMem_Realloc(). - -- Issue #19199: Remove ``PyThreadState.tick_counter`` field - -- Fix macro expansion of _PyErr_OCCURRED(), and make sure to use it in at - least one place so as to avoid regressions. - -- Issue #19087: Improve bytearray allocation in order to allow cheap popping - of data at the front (slice deletion). - -- Issue #19014: memoryview.cast() is now allowed on zero-length views. - -- Issue #18690: memoryview is now automatically registered with - collections.abc.Sequence - -- Issue #19078: memoryview now correctly supports the reversed builtin - (Patch by Claudiu Popa) - -Library -------- - -- Issue #17457: unittest test discovery now works with namespace packages. - Patch by Claudiu Popa. - -- Issue #18235: Fix the sysconfig variables LDSHARED and BLDSHARED under AIX. - Patch by David Edelsohn. - -- Issue #18606: Add the new "statistics" module (PEP 450). Contributed - by Steven D'Aprano. - -- Issue #12866: The audioop module now supports 24-bit samples. - -- Issue #19254: Provide an optimized Python implementation of pbkdf2_hmac. - -- Issues #19201, Issue #19222, Issue #19223: Add "x" mode (exclusive creation) - in opening file to bz2, gzip and lzma modules. Patches by Tim Heaney and - Vajrasky Kok. - -- Fix a reference count leak in _sre. - -- Issue #19262: Initial check in of the 'asyncio' package (a.k.a. Tulip, - a.k.a. PEP 3156). There are no docs yet, and the PEP is slightly - out of date with the code. This module will have *provisional* status - in Python 3.4. - -- Issue #19276: Fixed the wave module on 64-bit big-endian platforms. - -- Issue #19266: Rename the new-in-3.4 ``contextlib.ignore`` context manager - to ``contextlib.suppress`` in order to be more consistent with existing - descriptions of that operation elsewhere in the language and standard - library documentation (Patch by Zero Piraeus). - -- Issue #18891: Completed the new email package (provisional) API additions - by adding new classes EmailMessage, MIMEPart, and ContentManager. - -- Issue #18281: Unused stat constants removed from `tarfile`. - -- Issue #18999: Multiprocessing now supports 'contexts' with the same API - as the module, but bound to specified start methods. - -- Issue #18468: The re.split, re.findall, and re.sub functions and the group() - and groups() methods of match object now always return a string or a bytes - object. - -- Issue #18725: The textwrap module now supports truncating multiline text. - -- Issue #18776: atexit callbacks now display their full traceback when they - raise an exception. - -- Issue #17827: Add the missing documentation for ``codecs.encode`` and - ``codecs.decode``. - -- Issue #19218: Rename collections.abc to _collections_abc in order to - speed up interpreter start. - -- Issue #18582: Add 'pbkdf2_hmac' to the hashlib module. It implements PKCS#5 - password-based key derivation functions with HMAC as pseudorandom function. - -- Issue #19131: The aifc module now correctly reads and writes sampwidth of - compressed streams. - -- Issue #19209: Remove import of copyreg from the os module to speed up - interpreter startup. stat_result and statvfs_result are now hard-coded to - reside in the os module. - -- Issue #19205: Don't import the 're' module in site and sysconfig module to - speed up interpreter start. - -- Issue #9548: Add a minimal "_bootlocale" module that is imported by the - _io module instead of the full locale module. - -- Issue #18764: Remove the 'print' alias for the PDB 'p' command so that it no - longer shadows the print function. - -- Issue #19158: A rare race in BoundedSemaphore could allow .release() too - often. - -- Issue #15805: Add contextlib.redirect_stdout(). - -- Issue #18716: Deprecate the formatter module. - -- Issue #10712: 2to3 has a new "asserts" fixer that replaces deprecated names - of unittest methods (e.g. failUnlessEqual -> assertEqual). - -- Issue #18037: 2to3 now escapes ``'\u'`` and ``'\U'`` in native strings. - -- Issue #17839: base64.decodebytes and base64.encodebytes now accept any - object that exports a 1 dimensional array of bytes (this means the same - is now also true for base64_codec) - -- Issue #19132: The pprint module now supports compact mode. - -- Issue #19137: The pprint module now correctly formats instances of set and - frozenset subclasses. - -- Issue #10042: functools.total_ordering now correctly handles - NotImplemented being returned by the underlying comparison function (Patch - by Katie Miller) - -- Issue #19092: contextlib.ExitStack now correctly reraises exceptions - from the __exit__ callbacks of inner context managers (Patch by Hrvoje - Nikšić) - -- Issue #12641: Avoid passing "-mno-cygwin" to the mingw32 compiler, except - when necessary. Patch by Oscar Benjamin. - -- Issue #5845: In site.py, only load readline history from ~/.python_history - if no history has been read already. This avoids double writes to the - history file at shutdown. - -- Properly initialize all fields of a SSL object after allocation. - -- Issue #19095: SSLSocket.getpeercert() now raises ValueError when the - SSL handshake hasn't been done. - -- Issue #4366: Fix building extensions on all platforms when --enable-shared - is used. - -- Issue #19030: Fixed `inspect.getmembers` and `inspect.classify_class_attrs` - to attempt activating descriptors before falling back to a __dict__ search - for faulty descriptors. `inspect.classify_class_attrs` no longer returns - Attributes whose home class is None. - -C API ------ - -- Issue #1772673: The type of `char*` arguments now changed to `const char*`. - -- Issue #16129: Added a `Py_SetStandardStreamEncoding` pre-initialization API - to allow embedding applications like Blender to force a particular - encoding and error handler for the standard IO streams (initial patch by - Bastien Montagne) - -Tests ------ - -- Issue #19275: Fix test_site on AMD64 Snow Leopard - -- Issue #14407: Fix unittest test discovery in test_concurrent_futures. - -- Issue #18919: Unified and extended tests for audio modules: aifc, sunau and - wave. - -- Issue #18714: Added tests for ``pdb.find_function()``. - -Documentation -------------- - -- Issue #18758: Fixed and improved cross-references. - -- Issue #18972: Modernize email examples and use the argparse module in them. - -Build ------ - -- Issue #19130: Correct PCbuild/readme.txt, Python 3.3 and 3.4 require VS 2010. - -- Issue #15663: Update OS X 10.6+ installer to use Tcl/Tk 8.5.15. - -- Issue #14499: Fix several problems with OS X universal build support: - 1. ppc arch detection for extension module builds broke with Xcode 5 - 2. ppc arch detection in configure did not work on OS X 10.4 - 3. -sysroot and -arch flags were unnecessarily duplicated - 4. there was no obvious way to configure an intel-32 only build. - -- Issue #19019: Change the OS X installer build script to use CFLAGS instead - of OPT for special build options. By setting OPT, some compiler-specific - options like -fwrapv were overridden and thus not used, which could result - in broken interpreters when building with clang. - - -What's New in Python 3.4.0 Alpha 3? -=================================== - -Release date: 2013-09-29 - -Core and Builtins ------------------ - -- Issue #18818: The "encodingname" part of PYTHONIOENCODING is now optional. - -- Issue #19098: Prevent overflow in the compiler when the recursion limit is set - absurdly high. - -Library -------- - -- Issue #18929: `inspect.classify_class_attrs()` now correctly finds class - attributes returned by `dir()` that are located in the metaclass. - -- Issue #18950: Fix miscellaneous bugs in the sunau module. - Au_read.readframes() now updates current file position and reads correct - number of frames from multichannel stream. Au_write.writeframesraw() now - correctly updates current file position. Au_read.getnframes() now returns an - integer (as in Python 2). Au_read and Au_write now correctly works with file - object if start file position is not a zero. - -- Issue #18594: The fast path for collections.Counter() was never taken - due to an over-restrictive type check. - -- Issue #19053: ZipExtFile.read1() with non-zero argument no more returns empty - bytes until end of data. - -- logging: added support for Unix domain sockets to SocketHandler and - DatagramHandler. - -- Issue #18996: TestCase.assertEqual() now more cleverly shorten differing - strings in error report. - -- Issue #19034: repr() for tkinter.Tcl_Obj now exposes string reperesentation. - -- Issue #18978: ``urllib.request.Request`` now allows the method to be - indicated on the class and no longer sets it to None in ``__init__``. - -- Issue #18626: the inspect module now offers a basic command line - introspection interface (Initial patch by Claudiu Popa) - -- Issue #3015: Fixed tkinter with wantobject=False. Any Tcl command call - returned empty string. - -- Issue #19037: The mailbox module now makes all changes to maildir files - before moving them into place, to avoid race conditions with other programs - that may be accessing the maildir directory. - -- Issue #14984: On POSIX systems, when netrc is called without a filename - argument (and therefore is reading the user's $HOME/.netrc file), it now - enforces the same security rules as typical ftp clients: the .netrc file must - be owned by the user that owns the process and must not be readable by any - other user. - -- Issue #18873: The tokenize module now detects Python source code encoding - only in comment lines. - -- Issue #17764: Enable http.server to bind to a user specified network - interface. Patch contributed by Malte Swart. - -- Issue #18937: Add an assertLogs() context manager to unittest.TestCase - to ensure that a block of code emits a message using the logging module. - -- Issue #17324: Fix http.server's request handling case on trailing '/'. Patch - contributed by Vajrasky Kok. - -- Issue #19018: The heapq.merge() function no longer suppresses IndexError - in the underlying iterables. - -- Issue #18784: The uuid module no longer attempts to load libc via ctypes.CDLL - if all the necessary functions have already been found in libuuid. Patch by - Evgeny Sologubov. - -- The :envvar:`PYTHONFAULTHANDLER` environment variable now only enables the - faulthandler module if the variable is non-empty. Same behaviour than other - variables like :envvar:`PYTHONDONTWRITEBYTECODE`. - -- Issue #1565525: New function ``traceback.clear_frames`` will clear - the local variables of all the stack frames referenced by a traceback - object. - -Tests ------ - -- Issue #18952: Fix regression in support data downloads introduced when - test.support was converted to a package. Regression noticed by Zachary - Ware. - -IDLE ----- - -- Issue #18873: IDLE now detects Python source code encoding only in comment - lines. - -- Issue #18988: The "Tab" key now works when a word is already autocompleted. - -Documentation -------------- - -- Issue #17003: Unified the size argument names in the io module with common - practice. - -Build ------ - -- Issue #18596: Support the use of address sanity checking in recent versions - of clang and GCC by appropriately marking known false alarms in the small - object allocator. Patch contributed by Dhiru Kholia. - -Tools/Demos ------------ - -- Issue #18873: 2to3 and the findnocoding.py script now detect Python source - code encoding only in comment lines. - - -What's New in Python 3.4.0 Alpha 2? -=================================== - -Release date: 2013-09-09 - -Core and Builtins ------------------ - -- Issue #18942: sys._debugmallocstats() output was damaged on Windows. - -- Issue #18571: Implementation of the PEP 446: file descriptors and file - handles are now created non-inheritable; add functions - os.get/set_inheritable(), os.get/set_handle_inheritable() and - socket.socket.get/set_inheritable(). - -- Issue #11619: The parser and the import machinery do not encode Unicode - filenames anymore on Windows. - -- Issue #18808: Non-daemon threads are now automatically joined when - a sub-interpreter is shutdown (it would previously dump a fatal error). - -- Remove support for compiling on systems without getcwd(). - -- Issue #18774: Remove last bits of GNU PTH thread code and thread_pth.h. - -- Issue #18771: Add optimization to set object lookups to reduce the cost - of hash collisions. The core idea is to inspect a second key/hash pair - for each cache line retrieved. - -- Issue #16105: When a signal handler fails to write to the file descriptor - registered with ``signal.set_wakeup_fd()``, report an exception instead - of ignoring the error. - -- Issue #18722: Remove uses of the "register" keyword in C code. - -- Issue #18667: Add missing "HAVE_FCHOWNAT" symbol to posix._have_functions. - -- Issue #16499: Add command line option for isolated mode. - -- Issue #15301: Parsing fd, uid, and gid parameters for builtins - in Modules/posixmodule.c is now far more robust. - -- Issue #18368: PyOS_StdioReadline() no longer leaks memory when realloc() - fail. - -- Issue #17934: Add a clear() method to frame objects, to help clean up - expensive details (local variables) and break reference cycles. - -- Issue #18780: %-formatting codes %d, %i, and %u now treat int-subclasses - as int (displays value of int-subclass instead of str(int-subclass) ). - -Library -------- - -- Issue #18808: Thread.join() now waits for the underlying thread state to - be destroyed before returning. This prevents unpredictable aborts in - Py_EndInterpreter() when some non-daemon threads are still running. - -- Issue #18458: Prevent crashes with newer versions of libedit. Its readline - emulation has changed from 0-based indexing to 1-based like gnu readline. - -- Issue #18852: Handle case of ``readline.__doc__`` being ``None`` in the new - readline activation code in ``site.py``. - -- Issue #18672: Fixed format specifiers for Py_ssize_t in debugging output in - the _sre module. - -- Issue #18830: inspect.getclasstree() no longer produces duplicate entries even - when input list contains duplicates. - -- Issue #18878: sunau.open now supports the context management protocol. Based on - patches by Claudiu Popa and R. David Murray. - -- Issue #18909: Fix _tkinter.tkapp.interpaddr() on Windows 64-bit, don't cast - 64-bit pointer to long (32 bits). - -- Issue #18876: The FileIO.mode attribute now better reflects the actual mode - under which the file was opened. Patch by Erik Bray. - -- Issue #16853: Add new selectors module. - -- Issue #18882: Add threading.main_thread() function. - -- Issue #18901: The sunau getparams method now returns a namedtuple rather than - a plain tuple. Patch by Claudiu Popa. - -- Issue #17487: The result of the wave getparams method now is pickleable again. - Patch by Claudiu Popa. - -- Issue #18756: os.urandom() now uses a lazily-opened persistent file - descriptor, so as to avoid using many file descriptors when run in - parallel from multiple threads. - -- Issue #18418: After fork(), reinit all threads states, not only active ones. - Patch by A. Jesse Jiryu Davis. - -- Issue #17974: Switch unittest from using getopt to using argparse. - -- Issue #11798: TestSuite now drops references to own tests after execution. - -- Issue #16611: http.cookie now correctly parses the 'secure' and 'httponly' - cookie flags. - -- Issue #11973: Fix a problem in kevent. The flags and fflags fields are now - properly handled as unsigned. - -- Issue #18807: ``pyvenv`` now takes a --copies argument allowing copies - instead of symlinks even where symlinks are available and the default. - -- Issue #18538: ``python -m dis`` now uses argparse for argument processing. - Patch by Michele Orrù. - -- Issue #18394: Close cgi.FieldStorage's optional file. - -- Issue #17702: On error, os.environb now suppresses the exception context - when raising a new KeyError with the original key. - -- Issue #16809: Fixed some tkinter incompabilities with Tcl/Tk 8.6. - -- Issue #16809: Tkinter's splitlist() and split() methods now accept Tcl_Obj - argument. - -- Issue #18324: set_payload now correctly handles binary input. This also - supersedes the previous fixes for #14360, #1717, and #16564. - -- Issue #18794: Add a fileno() method and a closed attribute to select.devpoll - objects. - -- Issue #17119: Fixed integer overflows when processing large strings and tuples - in the tkinter module. - -- Issue #18747: Re-seed OpenSSL's pseudo-random number generator after fork. - A pthread_atfork() parent handler is used to seed the PRNG with pid, time - and some stack data. - -- Issue #8865: Concurrent invocation of select.poll.poll() now raises a - RuntimeError exception. Patch by Christian Schubert. - -- Issue #18777: The ssl module now uses the new CRYPTO_THREADID API of - OpenSSL 1.0.0+ instead of the deprecated CRYPTO id callback function. - -- Issue #18768: Correct doc string of RAND_edg(). Patch by Vajrasky Kok. - -- Issue #18178: Fix ctypes on BSD. dlmalloc.c was compiled twice which broke - malloc weak symbols. - -- Issue #18709: Fix CVE-2013-4238. The SSL module now handles NULL bytes - inside subjectAltName correctly. Formerly the module has used OpenSSL's - GENERAL_NAME_print() function to get the string representation of ASN.1 - strings for ``rfc822Name`` (email), ``dNSName`` (DNS) and - ``uniformResourceIdentifier`` (URI). - -- Issue #18701: Remove support of old CPython versions (<3.0) from C code. - -- Issue #18756: Improve error reporting in os.urandom() when the failure - is due to something else than /dev/urandom not existing (for example, - exhausting the file descriptor limit). - -- Issue #18673: Add O_TMPFILE to os module. O_TMPFILE requires Linux kernel - 3.11 or newer. It's only defined on system with 3.11 uapi headers, too. - -- Issue #18532: Change the builtin hash algorithms' names to lower case names - as promised by hashlib's documentation. - -- Issue #8713: add new spwan and forkserver start methods, and new functions - get_all_start_methods, get_start_method, and set_start_method, to - multiprocessing. - -- Issue #18405: Improve the entropy of crypt.mksalt(). - -- Issue #12015: The tempfile module now uses a suffix of 8 random characters - instead of 6, to reduce the risk of filename collision. The entropy was - reduced when uppercase letters were removed from the charset used to generate - random characters. - -- Issue #18585: Add :func:`textwrap.shorten` to collapse and truncate a - piece of text to a given length. - -- Issue #18598: Tweak exception message for importlib.import_module() to - include the module name when a key argument is missing. - -- Issue #19151: Fix docstring and use of _get_supported_file_loaders() to - reflect 2-tuples. - -- Issue #19152: Add ExtensionFileLoader.get_filename(). - -- Issue #18676: Change 'positive' to 'non-negative' in queue.py put and get - docstrings and ValueError messages. Patch by Zhongyue Luo - -- Fix refcounting issue with extension types in tkinter. - -- Issue #8112: xlmrpc.server's DocXMLRPCServer server no longer raises an error - if methods have annotations; it now correctly displays the annotations. - -- Issue #18600: Added policy argument to email.message.Message.as_string, - and as_bytes and __bytes__ methods to Message. - -- Issue #18671: Output more information when logging exceptions occur. - -- Issue #18621: Prevent the site module's patched builtins from keeping - too many references alive for too long. - -- Issue #4885: Add weakref support to mmap objects. Patch by Valerie Lambert. - -- Issue #8860: Fixed rounding in timedelta constructor. - -- Issue #18849: Fixed a Windows-specific tempfile bug where collision with an - existing directory caused mkstemp and related APIs to fail instead of - retrying. Report and fix by Vlad Shcherbina. - -- Issue #18920: argparse's default destination for the version action (-v, - --version) has also been changed to stdout, to match the Python executable. - -Tests ------ - -- Issue #18623: Factor out the _SuppressCoreFiles context manager into - test.support. Patch by Valerie Lambert. - -- Issue #12037: Fix test_email for desktop Windows. - -- Issue #15507: test_subprocess's test_send_signal could fail if the test - runner were run in an environment where the process inherited an ignore - setting for SIGINT. Restore the SIGINT handler to the desired - KeyboardInterrupt raising one during that test. - -- Issue #16799: Switched from getopt to argparse style in regrtest's argument - parsing. Added more tests for regrtest's argument parsing. - -- Issue #18792: Use "127.0.0.1" or "::1" instead of "localhost" as much as - possible, since "localhost" goes through a DNS lookup under recent Windows - versions. - -IDLE ----- - -- Issue #18489: Add tests for SearchEngine. Original patch by Phil Webster. - -Documentation -------------- - -- Issue #18743: Fix references to non-existent "StringIO" module. - -- Issue #18783: Removed existing mentions of Python long type in docstrings, - error messages and comments. - -Build ------ - -- Issue #1584: Provide configure options to override default search paths for - Tcl and Tk when building _tkinter. - -- Issue #15663: Tcl/Tk 8.5.14 is now included with the OS X 10.6+ 64-/32-bit - installer. It is no longer necessary to install a third-party version of - Tcl/Tk 8.5 to work around the problems in the Apple-supplied Tcl/Tk 8.5 - shipped in OS X 10.6 and later releases. - -Tools/Demos ------------ - -- Issue #18922: Now The Lib/smtpd.py and Tools/i18n/msgfmt.py scripts write - their version strings to stdout, and not to sderr. - - -What's New in Python 3.4.0 Alpha 1? -=================================== - -Release date: 2013-08-03 - -Core and Builtins ------------------ - -- Issue #16741: Fix an error reporting in int(). - -- Issue #17899: Fix rare file descriptor leak in os.listdir(). - -- Issue #10241: Clear extension module dict copies at interpreter shutdown. - Patch by Neil Schemenauer, minimally modified. - -- Issue #9035: ismount now recognises volumes mounted below a drive root - on Windows. Original patch by Atsuo Ishimoto. - -- Issue #18214: Improve finalization of Python modules to avoid setting - their globals to None, in most cases. - -- Issue #18112: PEP 442 implementation (safe object finalization). - -- Issue #18552: Check return value of PyArena_AddPyObject() in - obj2ast_object(). - -- Issue #18560: Fix potential NULL pointer dereference in sum(). - -- Issue #18520: Add a new PyStructSequence_InitType2() function, same than - PyStructSequence_InitType() except that it has a return value (0 on success, - -1 on error). - -- Issue #15905: Fix theoretical buffer overflow in handling of sys.argv[0], - prefix and exec_prefix if the operation system does not obey MAXPATHLEN. - -- Issue #18408: Fix many various bugs in code handling errors, especially - on memory allocation failure (MemoryError). - -- Issue #18344: Fix potential ref-leaks in _bufferedreader_read_all(). - -- Issue #18342: Use the repr of a module name when an import fails when using - ``from ... import ...``. - -- Issue #17872: Fix a segfault in marshal.load() when input stream returns - more bytes than requested. - -- Issue #18338: `python --version` now prints version string to stdout, and - not to stderr. Patch by Berker Peksag and Michael Dickens. - -- Issue #18426: Fix NULL pointer dereference in C extension import when - PyModule_GetDef() returns an error. - -- Issue #17206: On Windows, increase the stack size from 2 MB to 4.2 MB to fix - a stack overflow in the marshal module (fix a crash in test_marshal). - Patch written by Jeremy Kloth. - -- Issue #3329: Implement the PEP 445: Add new APIs to customize Python memory - allocators. - -- Issue #18328: Reorder ops in PyThreadState_Delete*() functions. Now the - tstate is first removed from TLS and then deallocated. - -- Issue #13483: Use VirtualAlloc in obmalloc on Windows. - -- Issue #18184: PyUnicode_FromFormat() and PyUnicode_FromFormatV() now raise - OverflowError when an argument of %c format is out of range. - -- Issue #18111: The min() and max() functions now support a default argument - to be returned instead of raising a ValueError on an empty sequence. - (Contributed by Julian Berman.) - -- Issue #18137: Detect integer overflow on precision in float.__format__() - and complex.__format__(). - -- Issue #18183: Fix various unicode operations on strings with large unicode - codepoints. - -- Issue #18180: Fix ref leak in _PyImport_GetDynLoadWindows(). - -- Issue #18038: SyntaxError raised during compilation sources with illegal - encoding now always contains an encoding name. - -- Issue #17931: Resolve confusion on Windows between pids and process - handles. - -- Tweak the exception message when the magic number or size value in a bytecode - file is truncated. - -- Issue #17932: Fix an integer overflow issue on Windows 64-bit in iterators: - change the C type of seqiterobject.it_index from long to Py_ssize_t. - -- Issue #18065: Don't set __path__ to the package name for frozen packages. - -- Issue #18088: When reloading a module, unconditionally reset all relevant - attributes on the module (e.g. __name__, __loader__, __package__, __file__, - __cached__). - -- Issue #17937: Try harder to collect cyclic garbage at shutdown. - -- Issue #12370: Prevent class bodies from interfering with the __class__ - closure. - -- Issue #17644: Fix a crash in str.format when curly braces are used in square - brackets. - -- Issue #17237: Fix crash in the ASCII decoder on m68k. - -- Issue #17927: Frame objects kept arguments alive if they had been - copied into a cell, even if the cell was cleared. - -- Issue #1545463: At shutdown, defer finalization of codec modules so - that stderr remains usable. - -- Issue #7330: Implement width and precision (ex: "%5.3s") for the format - string of PyUnicode_FromFormat() function, original patch written by Ysj Ray. - -- Issue #1545463: Global variables caught in reference cycles are now - garbage-collected at shutdown. - -- Issue #17094: Clear stale thread states after fork(). Note that this - is a potentially disruptive change since it may release some system - resources which would otherwise remain perpetually alive (e.g. database - connections kept in thread-local storage). - -- Issue #17408: Avoid using an obsolete instance of the copyreg module when - the interpreter is shutdown and then started again. - -- Issue #5845: Enable tab-completion in the interactive interpreter by - default, thanks to a new sys.__interactivehook__. - -- Issue #17115,17116: Module initialization now includes setting __package__ and - __loader__ attributes to None. - -- Issue #17853: Ensure locals of a class that shadow free variables always win - over the closures. - -- Issue #17863: In the interactive console, don't loop forever if the encoding - can't be fetched from stdin. - -- Issue #17867: Raise an ImportError if __import__ is not found in __builtins__. - -- Issue #18698: Ensure importlib.reload() returns the module out of sys.modules. - -- Issue #17857: Prevent build failures with pre-3.5.0 versions of sqlite3, - such as was shipped with Centos 5 and Mac OS X 10.4. - -- Issue #17413: sys.settrace callbacks were being passed a string instead of an - exception instance for the 'value' element of the arg tuple if the exception - originated from C code; now an exception instance is always provided. - -- Issue #17782: Fix undefined behaviour on platforms where - ``struct timespec``'s "tv_nsec" member is not a C long. - -- Issue #17722: When looking up __round__, resolve descriptors. - -- Issue #16061: Speed up str.replace() for replacing 1-character strings. - -- Issue #17715: Fix segmentation fault from raising an exception in a __trunc__ - method. - -- Issue #17643: Add __callback__ attribute to weakref.ref. - -- Issue #16447: Fixed potential segmentation fault when setting __name__ on a - class. - -- Issue #17669: Fix crash involving finalization of generators using yield from. - -- Issue #14439: Python now prints the traceback on runpy failure at startup. - -- Issue #17469: Fix _Py_GetAllocatedBlocks() and sys.getallocatedblocks() - when running on valgrind. - -- Issue #17619: Make input() check for Ctrl-C correctly on Windows. - -- Issue #17357: Add missing verbosity messages for -v/-vv that were lost during - the importlib transition. - -- Issue #17610: Don't rely on non-standard behavior of the C qsort() function. - -- Issue #17323: The "[X refs, Y blocks]" printed by debug builds has been - disabled by default. It can be re-enabled with the `-X showrefcount` option. - -- Issue #17328: Fix possible refleak in dict.setdefault. - -- Issue #17275: Corrected class name in init error messages of the C version of - BufferedWriter and BufferedRandom. - -- Issue #7963: Fixed misleading error message that issued when object is - called without arguments. - -- Issue #8745: Small speed up zipimport on Windows. Patch by Catalin Iacob. - -- Issue #5308: Raise ValueError when marshalling too large object (a sequence - with size >= 2**31), instead of producing illegal marshal data. - -- Issue #12983: Bytes literals with invalid ``\x`` escape now raise a SyntaxError - and a full traceback including line number. - -- Issue #16967: In function definition, evaluate positional defaults before - keyword-only defaults. - -- Issue #17173: Remove uses of locale-dependent C functions (isalpha() etc.) - in the interpreter. - -- Issue #17137: When a Unicode string is resized, the internal wide character - string (wstr) format is now cleared. - -- Issue #17043: The unicode-internal decoder no longer read past the end of - input buffer. - -- Issue #17098: All modules now have __loader__ set even if they pre-exist the - bootstrapping of importlib. - -- Issue #16979: Fix error handling bugs in the unicode-escape-decode decoder. - -- Issue #16772: The base argument to the int constructor no longer accepts - floats, or other non-integer objects with an __int__ method. Objects - with an __index__ method are now accepted. - -- Issue #10156: In the interpreter's initialization phase, unicode globals - are now initialized dynamically as needed. - -- Issue #16980: Fix processing of escaped non-ascii bytes in the - unicode-escape-decode decoder. - -- Issue #16975: Fix error handling bug in the escape-decode bytes decoder. - -- Issue #14850: Now a charmap decoder treats U+FFFE as "undefined mapping" - in any mapping, not only in a string. - -- Issue #16613: Add *m* argument to ``collections.Chainmap.new_child`` to - allow the new child map to be specified explicitly. - -- Issue #16730: importlib.machinery.FileFinder now no longers raises an - exception when trying to populate its cache and it finds out the directory is - unreadable or has turned into a file. Reported and diagnosed by - David Pritchard. - -- Issue #16906: Fix a logic error that prevented most static strings from being - cleared. - -- Issue #11461: Fix the incremental UTF-16 decoder. Original patch by - Amaury Forgeot d'Arc. - -- Issue #16856: Fix a segmentation fault from calling repr() on a dict with - a key whose repr raise an exception. - -- Issue #16367: Fix FileIO.readall() on Windows for files larger than 2 GB. - -- Issue #16761: Calling int() with base argument only now raises TypeError. - -- Issue #16759: Support the full DWORD (unsigned long) range in Reg2Py - when retrieving a REG_DWORD value. This corrects functions like - winreg.QueryValueEx that may have been returning truncated values. - -- Issue #14420: Support the full DWORD (unsigned long) range in Py2Reg - when passed a REG_DWORD value. Fixes OverflowError in winreg.SetValueEx. - -- Issue #11939: Set the st_dev attribute of stat_result to allow Windows to - take advantage of the os.path.samefile/sameopenfile/samestat implementations - used by other platforms. - -- Issue #16772: The int() constructor's second argument (base) no longer - accepts non integer values. Consistent with the behavior in Python 2. - -- Issue #14470: Remove w9xpopen support per PEP 11. - -- Issue #9856: Replace deprecation warning with raising TypeError - in object.__format__. Patch by Florent Xicluna. - -- Issue #16597: In buffered and text IO, call close() on the underlying stream - if invoking flush() fails. - -- Issue #16722: In the bytes() constructor, try to call __bytes__ on the - argument before __index__. - -- Issue #16421: loading multiple modules from one shared object is now - handled correctly (previously, the first module loaded from that file - was silently returned). Patch by Václav Šmilauer. - -- Issue #16602: When a weakref's target was part of a long deallocation - chain, the object could remain reachable through its weakref even though - its refcount had dropped to zero. - -- Issue #16495: Remove extraneous NULL encoding check from bytes_decode(). - -- Issue #16619: Create NameConstant AST class to represent None, True, and False - literals. As a result, these constants are never loaded at runtime from - builtins. - -- Issue #16455: On FreeBSD and Solaris, if the locale is C, the - ASCII/surrogateescape codec is now used (instead of the locale encoding) to - decode the command line arguments. This change fixes inconsistencies with - os.fsencode() and os.fsdecode(), because these operating systems announce an - ASCII locale encoding, but actually use the ISO-8859-1 encoding in practice. - -- Issue #16562: Optimize dict equality testing. Patch by Serhiy Storchaka. - -- Issue #16588: Silence unused-but-set warnings in Python/thread_pthread - -- Issue #16592: stringlib_bytes_join doesn't raise MemoryError on allocation - failure. - -- Issue #16546: Fix: ast.YieldFrom argument is now mandatory. - -- Issue #16514: Fix regression causing a traceback when sys.path[0] is None - (actually, any non-string or non-bytes type). - -- Issue #16306: Fix multiple error messages when unknown command line - parameters where passed to the interpreter. Patch by Hieu Nguyen. - -- Issue #16215: Fix potential double memory free in str.replace(). Patch - by Serhiy Storchaka. - -- Issue #16290: A float return value from the __complex__ special method is no - longer accepted in the complex() constructor. - -- Issue #16416: On Mac OS X, operating system data are now always - encoded/decoded to/from UTF-8/surrogateescape, instead of the locale encoding - (which may be ASCII if no locale environment variable is set), to avoid - inconsistencies with os.fsencode() and os.fsdecode() functions which are - already using UTF-8/surrogateescape. - -- Issue #16453: Fix equality testing of dead weakref objects. - -- Issue #9535: Fix pending signals that have been received but not yet - handled by Python to not persist after os.fork() in the child process. - -- Issue #14794: Fix slice.indices to return correct results for huge values, - rather than raising OverflowError. - -- Issue #15001: fix segfault on "del sys.modules['__main__']". Patch by Victor - Stinner. - -- Issue #8271: the utf-8 decoder now outputs the correct number of U+FFFD - characters when used with the 'replace' error handler on invalid utf-8 - sequences. Patch by Serhiy Storchaka, tests by Ezio Melotti. - -- Issue #5765: Apply a hard recursion limit in the compiler instead of - blowing the stack and segfaulting. Initial patch by Andrea Griffini. - -- Issue #16402: When slicing a range, fix shadowing of exceptions from - __index__. - -- Issue #16336: fix input checking in the surrogatepass error handler. - Patch by Serhiy Storchaka. - -- Issue #8401: assigning an int to a bytearray slice (e.g. b[3:4] = 5) now - raises an error. - -- Issue #7317: Display full tracebacks when an error occurs asynchronously. - Patch by Alon Horev with update by Alexey Kachayev. - -- Issue #16309: Make PYTHONPATH="" behavior the same as if PYTHONPATH - not set at all. - -- Issue #10189: Improve the error reporting of SyntaxErrors related to global - and nonlocal statements. - -- Fix segfaults on setting __qualname__ on builtin types and attempting to - delete it on any type. - -- Issue #14625: Rewrite the UTF-32 decoder. It is now 3x to 4x faster. Patch - written by Serhiy Storchaka. - -- Issue #16345: Fix an infinite loop when ``fromkeys`` on a dict subclass - received a nonempty dict from the constructor. - -- Issue #16271: Fix strange bugs that resulted from __qualname__ appearing in a - class's __dict__ and on type. - -- Issue #12805: Make bytes.join and bytearray.join faster when the separator - is empty. Patch by Serhiy Storchaka. - -- Issue #6074: Ensure cached bytecode files can always be updated by the - user that created them, even when the source file is read-only. - -- Issue #15958: bytes.join and bytearray.join now accept arbitrary buffer - objects. - -- Issue #14783: Improve int() docstring and switch docstrings for str(), - range(), and slice() to use multi-line signatures. - -- Issue #16160: Subclass support now works for types.SimpleNamespace. - -- Issue #16148: Implement PEP 424, adding operator.length_hint and - PyObject_LengthHint. - -- Upgrade Unicode data (UCD) to version 6.2. - -- Issue #15379: Fix passing of non-BMP characters as integers for the charmap - decoder (already working as unicode strings). Patch by Serhiy Storchaka. - -- Issue #15144: Fix possible integer overflow when handling pointers as integer - values, by using `Py_uintptr_t` instead of `size_t`. Patch by Serhiy - Storchaka. - -- Issue #15965: Explicitly cast `AT_FDCWD` as (int). Required on Solaris 10 - (which defines `AT_FDCWD` as ``0xffd19553``), harmless on other platforms. - -- Issue #15839: Convert SystemErrors in `super()` to RuntimeErrors. - -- Issue #15448: Buffered IO now frees the buffer when closed, instead - of when deallocating. - -- Issue #15846: Fix SystemError which happened when using `ast.parse()` in an - exception handler on code with syntax errors. - -- Issue #15897: zipimport.c doesn't check return value of fseek(). - Patch by Felipe Cruz. - -- Issue #15801: Make sure mappings passed to '%' formatting are actually - subscriptable. - -- Issue #15111: __import__ should propagate ImportError when raised as a - side-effect of a module triggered from using fromlist. - -- Issue #15022: Add pickle and comparison support to types.SimpleNamespace. - -Library -------- - -- Issue #4331: Added functools.partialmethod (Initial patch by Alon Horev) - -- Issue #13461: Fix a crash in the TextIOWrapper.tell method on 64-bit - platforms. Patch by Yogesh Chaudhari. - -- Issue #18681: Fix a NameError in importlib.reload() (noticed by Weizhao Li). - -- Issue #14323: Expanded the number of digits in the coefficients for the - RGB -- YIQ conversions so that they match the FCC NTSC versions. - -- Issue #17998: Fix an internal error in regular expression engine. - -- Issue #17557: Fix os.getgroups() to work with the modified behavior of - getgroups(2) on OS X 10.8. Original patch by Mateusz Lenik. - -- Issue #18608: Avoid keeping a strong reference to the locale module - inside the _io module. - -- Issue #18619: Fix atexit leaking callbacks registered from sub-interpreters, - and make it GC-aware. - -- Issue #15699: The readline module now uses PEP 3121-style module - initialization, so as to reclaim allocated resources (Python callbacks) - at shutdown. Original patch by Robin Schreiber. - -- Issue #17616: wave.open now supports the context management protocol. - -- Issue #18599: Fix name attribute of _sha1.sha1() object. It now returns - 'SHA1' instead of 'SHA'. - -- Issue #13266: Added inspect.unwrap to easily unravel __wrapped__ chains - (initial patch by Daniel Urban and Aaron Iles) - -- Issue #18561: Skip name in ctypes' _build_callargs() if name is NULL. - -- Issue #18559: Fix NULL pointer dereference error in _pickle module - -- Issue #18556: Check the return type of PyUnicode_AsWideChar() in ctype's - U_set(). - -- Issue #17818: aifc.getparams now returns a namedtuple. - -- Issue #18549: Eliminate dead code in socket_ntohl() - -- Issue #18530: Remove additional stat call from posixpath.ismount. - Patch by Alex Gaynor. - -- Issue #18514: Fix unreachable Py_DECREF() call in PyCData_FromBaseObj() - -- Issue #9177: Calling read() or write() now raises ValueError, not - AttributeError, on a closed SSL socket. Patch by Senko Rasic. - -- Issue #18513: Fix behaviour of cmath.rect w.r.t. signed zeros on OS X 10.8 + - gcc. - -- Issue #18479: Changed venv Activate.ps1 to make deactivate a function, and - removed Deactivate.ps1. - -- Issue #18480: Add missing call to PyType_Ready to the _elementtree extension. - -- Issue #17778: Fix test discovery for test_multiprocessing. (Patch by - Zachary Ware.) - -- Issue #18393: The private module _gestalt and private functions - platform._mac_ver_gestalt, platform._mac_ver_lookup and - platform._bcd2str have been removed. This does not affect the public - interface of the platform module. - -- Issue #17482: functools.update_wrapper (and functools.wraps) now set the - __wrapped__ attribute correctly even if the underlying function has a - __wrapped__ attribute set. - -- Issue #18431: The new email header parser now decodes RFC2047 encoded words - in structured headers. - -- Issue #18432: The sched module's queue method was incorrectly returning - an iterator instead of a list. - -- Issue #18044: The new email header parser was mis-parsing encoded words where - an encoded character immediately followed the '?' that follows the CTE - character, resulting in a decoding failure. They are now decoded correctly. - -- Issue #18101: Tcl.split() now process strings nested in a tuple as it - do with byte strings. - -- Issue #18116: getpass was always getting an error when testing /dev/tty, - and thus was always falling back to stdin, and would then raise an exception - if stdin could not be used (such as /dev/null). It also leaked an open file. - All of these issues are now fixed. - -- Issue #17198: Fix a NameError in the dbm module. Patch by Valentina - Mukhamedzhanova. - -- Issue #18013: Fix cgi.FieldStorage to parse the W3C sample form. - -- Issue #18020: improve html.escape speed by an order of magnitude. - Patch by Matt Bryant. - -- Issue #18347: ElementTree's html serializer now preserves the case of - closing tags. - -- Issue #17261: Ensure multiprocessing's proxies use proper address. - -- Issue #18343: faulthandler.register() now keeps the previous signal handler - when the function is called twice, so faulthandler.unregister() restores - correctly the original signal handler. - -- Issue #17097: Make multiprocessing ignore EINTR. - -- Issue #18339: Negative ints keys in unpickler.memo dict no longer cause a - segfault inside the _pickle C extension. - -- Issue #18240: The HMAC module is no longer restricted to bytes and accepts - any bytes-like object, e.g. memoryview. Original patch by Jonas Borgström. - -- Issue #18224: Removed pydoc script from created venv, as it causes problems - on Windows and adds no value over and above python -m pydoc ... - -- Issue #18155: The csv module now correctly handles csv files that use - a delimiter character that has a special meaning in regexes, instead of - throwing an exception. - -- Issue #14360: encode_quopri can now be successfully used as an encoder - when constructing a MIMEApplication object. - -- Issue #11390: Add -o and -f command line options to the doctest CLI to - specify doctest options (and convert it to using argparse). - -- Issue #18135: ssl.SSLSocket.write() now raises an OverflowError if the input - string in longer than 2 gigabytes, and ssl.SSLContext.load_cert_chain() - raises a ValueError if the password is longer than 2 gigabytes. The ssl - module does not support partial write. - -- Issue #11016: Add C implementation of the stat module as _stat. - -- Issue #18248: Fix libffi build on AIX. - -- Issue #18259: Declare sethostname in socketmodule.c for AIX - -- Issue #18147: Add diagnostic functions to ssl.SSLContext(). get_ca_list() - lists all loaded CA certificates and cert_store_stats() returns amount of - loaded X.509 certs, X.509 CA certs and CRLs. - -- Issue #18167: cgi.FieldStorage no longer fails to handle multipart/form-data - when ``\r\n`` appears at end of 65535 bytes without other newlines. - -- Issue #18076: Introduce importlib.util.decode_source(). - -- Issue #18357: add tests for dictview set difference. - Patch by Fraser Tweedale. - -- importlib.abc.SourceLoader.get_source() no longer changes SyntaxError or - UnicodeDecodeError into ImportError. - -- Issue #18058, 18057: Make the namespace package loader meet the - importlib.abc.InspectLoader ABC, allowing for namespace packages to work with - runpy. - -- Issue #17177: The imp module is pending deprecation. - -- subprocess: Prevent a possible double close of parent pipe fds when the - subprocess exec runs into an error. Prevent a regular multi-close of the - /dev/null fd when any of stdin, stdout and stderr was set to DEVNULL. - -- Issue #18194: Introduce importlib.util.cache_from_source() and - source_from_cache() while documenting the equivalent functions in imp as - deprecated. - -- Issue #17907: Document imp.new_module() as deprecated in favour of - types.ModuleType. - -- Issue #18192: Introduce importlib.util.MAGIC_NUMBER and document as deprecated - imp.get_magic(). - -- Issue #18149: Add filecmp.clear_cache() to manually clear the filecmp cache. - Patch by Mark Levitt - -- Issue #18193: Add importlib.reload(). - -- Issue #18157: Stop using imp.load_module() in pydoc. - -- Issue #16102: Make uuid._netbios_getnode() work again on Python 3. - -- Issue #17134: Add ssl.enum_cert_store() as interface to Windows' cert store. - -- Issue #18143: Implement ssl.get_default_verify_paths() in order to debug - the default locations for cafile and capath. - -- Issue #17314: Move multiprocessing.forking over to importlib. - -- Issue #11959: SMTPServer and SMTPChannel now take an optional map, use of - which avoids affecting global state. - -- Issue #18109: os.uname() now decodes fields from the locale encoding, and - socket.gethostname() now decodes the hostname from the locale encoding, - instead of using the UTF-8 encoding in strict mode. - -- Issue #18089: Implement importlib.abc.InspectLoader.load_module. - -- Issue #18088: Introduce importlib.abc.Loader.init_module_attrs for setting - module attributes. Leads to the pending deprecation of - importlib.util.module_for_loader. - -- Issue #17403: urllib.parse.robotparser normalizes the urls before adding to - ruleline. This helps in handling certain types invalid urls in a conservative - manner. Patch contributed by Mher Movsisyan. - -- Issue #18070: Have importlib.util.module_for_loader() set attributes - unconditionally in order to properly support reloading. - -- Added importlib.util.module_to_load to return a context manager to provide the - proper module object to load. - -- Issue #18025: Fixed a segfault in io.BufferedIOBase.readinto() when raw - stream's read() returns more bytes than requested. - -- Issue #18011: As was originally intended, base64.b32decode() now raises a - binascii.Error if there are non-b32-alphabet characters present in the input - string, instead of a TypeError. - -- Issue #18072: Implement importlib.abc.InspectLoader.get_code() and - importlib.abc.ExecutionLoader.get_code(). - -- Issue #8240: Set the SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER flag on SSL - sockets. - -- Issue #17269: Workaround for socket.getaddrinfo crash on MacOS X - with port None or "0" and flags AI_NUMERICSERV. - -- Issue #16986: ElementTree now correctly works with string input when the - internal XML encoding is not UTF-8 or US-ASCII. - -- Issue #17996: socket module now exposes AF_LINK constant on BSD and OSX. - -- Issue #17900: Allowed pickling of recursive OrderedDicts. Decreased pickled - size and pickling time. - -- Issue #17914: Add os.cpu_count(). Patch by Yogesh Chaudhari, based on an - initial patch by Trent Nelson. - -- Issue #17812: Fixed quadratic complexity of base64.b32encode(). - Optimize base64.b32encode() and base64.b32decode() (speed up to 3x). - -- Issue #17980: Fix possible abuse of ssl.match_hostname() for denial of - service using certificates with many wildcards (CVE-2013-2099). - -- Issue #15758: Fix FileIO.readall() so it no longer has O(n**2) complexity. - -- Issue #14596: The struct.Struct() objects now use a more compact - implementation. - -- Issue #17981: logging's SysLogHandler now closes the socket when it catches - socket OSErrors. - -- Issue #17964: Fix os.sysconf(): the return type of the C sysconf() function - is long, not int. - -- Fix typos in the multiprocessing module. - -- Issue #17754: Make ctypes.util.find_library() independent of the locale. - -- Issue #17968: Fix memory leak in os.listxattr(). - -- Issue #17606: Fixed support of encoded byte strings in the XMLGenerator - characters() and ignorableWhitespace() methods. Original patch by Sebastian - Ortiz Vasquez. - -- Issue #17732: Ignore distutils.cfg options pertaining to install paths if a - virtual environment is active. - -- Issue #17915: Fix interoperability of xml.sax with file objects returned by - codecs.open(). - -- Issue #16601: Restarting iteration over tarfile really restarts rather - than continuing from where it left off. Patch by Michael Birtwell. - -- Issue #17289: The readline module now plays nicer with external modules - or applications changing the rl_completer_word_break_characters global - variable. Initial patch by Bradley Froehle. - -- Issue #12181: select module: Fix struct kevent definition on OpenBSD 64-bit - platforms. Patch by Federico Schwindt. - -- Issue #11816: multiple improvements to the dis module: get_instructions - generator, ability to redirect output to a file, Bytecode and Instruction - abstractions. Patch by Nick Coghlan, Ryan Kelly and Thomas Kluyver. - -- Issue #13831: Embed stringification of remote traceback in local - traceback raised when pool task raises an exception. - -- Issue #15528: Add weakref.finalize to support finalization using - weakref callbacks. - -- Issue #14173: Avoid crashing when reading a signal handler during - interpreter shutdown. - -- Issue #15902: Fix imp.load_module() accepting None as a file when loading an - extension module. - -- Issue #13721: SSLSocket.getpeercert() and SSLSocket.do_handshake() now - raise an OSError with ENOTCONN, instead of an AttributeError, when the - SSLSocket is not connected. - -- Issue #14679: add an __all__ (that contains only HTMLParser) to html.parser. - -- Issue #17802: Fix an UnboundLocalError in html.parser. Initial tests by - Thomas Barlow. - -- Issue #17358: Modules loaded by imp.load_source() and load_compiled() (and by - extension load_module()) now have a better chance of working when reloaded. - -- Issue #17804: New function ``struct.iter_unpack`` allows for streaming - struct unpacking. - -- Issue #17830: When keyword.py is used to update a keyword file, it now - preserves the line endings of the original file. - -- Issue #17272: Making the urllib.request's Request.full_url a descriptor. - Fixes bugs with assignment to full_url. Patch by Demian Brecht. - -- Issue #17353: Plistlib emitted empty data tags with deeply nested datastructures - -- Issue #11714: Use 'with' statements to assure a Semaphore releases a - condition variable. Original patch by Thomas Rachel. - -- Issue #16624: `subprocess.check_output` now accepts an `input` argument, - allowing the subprocess's stdin to be provided as a (byte) string. - Patch by Zack Weinberg. - -- Issue #17795: Reverted backwards-incompatible change in SysLogHandler with - Unix domain sockets. - -- Issue #16694: Add a pure Python implementation of the operator module. - Patch by Zachary Ware. - -- Issue #11182: remove the unused and undocumented pydoc.Scanner class. - Patch by Martin Morrison. - -- Issue #17741: Add ElementTree.XMLPullParser, an event-driven parser for - non-blocking applications. - -- Issue #17555: Fix ForkAwareThreadLock so that size of after fork - registry does not grow exponentially with generation of process. - -- Issue #17707: fix regression in multiprocessing.Queue's get() method where - it did not block for short timeouts. - -- Issue #17720: Fix the Python implementation of pickle.Unpickler to correctly - process the APPENDS opcode when it is used on non-list objects. - -- Issue #17012: shutil.which() no longer falls back to the PATH environment - variable if an empty path argument is specified. Patch by Serhiy Storchaka. - -- Issue #17710: Fix pickle raising a SystemError on bogus input. - -- Issue #17341: Include the invalid name in the error messages from re about - invalid group names. - -- Issue #17702: os.environ now raises KeyError with the original environment - variable name (str on UNIX), instead of using the encoded name (bytes on - UNIX). - -- Issue #16163: Make the importlib based version of pkgutil.iter_importers - work for submodules. Initial patch by Berker Peksag. - -- Issue #16804: Fix a bug in the 'site' module that caused running - 'python -S -m site' to incorrectly throw an exception. - -- Issue #15480: Remove the deprecated and unused TYPE_INT64 code from marshal. - Initial patch by Daniel Riti. - -- Issue #2118: SMTPException is now a subclass of OSError. - -- Issue #17016: Get rid of possible pointer wraparounds and integer overflows - in the re module. Patch by Nickolai Zeldovich. - -- Issue #16658: add missing return to HTTPConnection.send(). - Patch by Jeff Knupp. - -- Issue #9556: the logging package now allows specifying a time-of-day for a - TimedRotatingFileHandler to rotate. - -- Issue #14971: unittest test discovery no longer gets confused when a function - has a different __name__ than its name in the TestCase class dictionary. - -- Issue #17487: The wave getparams method now returns a namedtuple rather than - a plain tuple. - -- Issue #17675: socket repr() provides local and remote addresses (if any). - Patch by Giampaolo Rodola' - -- Issue #17093: Make the ABCs in importlib.abc provide default values or raise - reasonable exceptions for their methods to make them more amenable to super() - calls. - -- Issue #17566: Make importlib.abc.Loader.module_repr() optional instead of an - abstractmethod; now it raises NotImplementedError so as to be ignored by default. - -- Issue #17678: Remove the use of deprecated method in http/cookiejar.py by - changing the call to get_origin_req_host() to origin_req_host. - -- Issue #17666: Fix reading gzip files with an extra field. - -- Issue #16475: Support object instancing, recursion and interned strings - in marshal - -- Issue #17502: Process DEFAULT values in mock side_effect that returns iterator. - -- Issue #16795: On the ast.arguments object, unify vararg with varargannotation - and kwarg and kwargannotation. Change the column offset of ast.Attribute to be - at the attribute name. - -- Issue #17434: Properly raise a SyntaxError when a string occurs between future - imports. - -- Issue #17117: Import and @importlib.util.set_loader now set __loader__ when - it has a value of None or the attribute doesn't exist. - -- Issue #17032: The "global" in the "NameError: global name 'x' is not defined" - error message has been removed. Patch by Ram Rachum. - -- Issue #18080: When building a C extension module on OS X, if the compiler - is overridden with the CC environment variable, use the new compiler as - the default for linking if LDSHARED is not also overridden. This restores - Distutils behavior introduced in 3.2.3 and inadvertently dropped in 3.3.0. - -- Issue #18113: Fixed a refcount leak in the curses.panel module's - set_userptr() method. Reported by Atsuo Ishimoto. - -- Implement PEP 443 "Single-dispatch generic functions". - -- Implement PEP 435 "Adding an Enum type to the Python standard library". - -- Issue #15596: Faster pickling of unicode strings. - -- Issue #17572: Avoid chained exceptions when passing bad directives to - time.strptime(). Initial patch by Claudiu Popa. - -- Issue #17435: threading.Timer's __init__ method no longer uses mutable - default values for the args and kwargs parameters. - -- Issue #17526: fix an IndexError raised while passing code without filename to - inspect.findsource(). Initial patch by Tyler Doyle. - -- Issue #17540: Added style parameter to logging formatter configuration by dict. - -- Issue #16692: The ssl module now supports TLS 1.1 and TLS 1.2. Initial - patch by Michele Orrù. - -- Issue #17025: multiprocessing: Reduce Queue and SimpleQueue contention. - -- Issue #17536: Add to webbrowser's browser list: www-browser, x-www-browser, - iceweasel, iceape. - -- Issue #17150: pprint now uses line continuations to wrap long string - literals. - -- Issue #17488: Change the subprocess.Popen bufsize parameter default value - from unbuffered (0) to buffering (-1) to match the behavior existing code - expects and match the behavior of the subprocess module in Python 2 to avoid - introducing hard to track down bugs. - -- Issue #17521: Corrected non-enabling of logger following two calls to - fileConfig(). - -- Issue #17508: Corrected logging MemoryHandler configuration in dictConfig() - where the target handler wasn't configured first. - -- Issue #17209: curses.window.get_wch() now correctly handles KeyboardInterrupt - (CTRL+c). - -- Issue #5713: smtplib now handles 421 (closing connection) error codes when - sending mail by closing the socket and reporting the 421 error code via the - exception appropriate to the command that received the error response. - -- Issue #16997: unittest.TestCase now provides a subTest() context manager - to procedurally generate, in an easy way, small test instances. - -- Issue #17485: Also delete the Request Content-Length header if the data - attribute is deleted. (Follow on to issue Issue #16464). - -- Issue #15927: CVS now correctly parses escaped newlines and carriage - when parsing with quoting turned off. - -- Issue #17467: add readline and readlines support to mock_open in - unittest.mock. - -- Issue #13248: removed deprecated and undocumented difflib.isbjunk, - isbpopular. - -- Issue #17192: Update the ctypes module's libffi to v3.0.13. This - specifically addresses a stack misalignment issue on x86 and issues on - some more recent platforms. - -- Issue #8862: Fixed curses cleanup when getkey is interrupted by a signal. - -- Issue #17443: imaplib.IMAP4_stream was using the default unbuffered IO - in subprocess, but the imap code assumes buffered IO. In Python2 this - worked by accident. IMAP4_stream now explicitly uses buffered IO. - -- Issue #17476: Fixed regression relative to Python2 in undocumented pydoc - 'allmethods'; it was missing unbound methods on the class. - -- Issue #17474: Remove the deprecated methods of Request class. - -- Issue #16709: unittest discover order is no-longer filesystem specific. Patch - by Jeff Ramnani. - -- Use the HTTPS PyPI url for upload, overriding any plain HTTP URL in pypirc. - -- Issue #5024: sndhdr.whichhdr now returns the frame count for WAV files - rather than -1. - -- Issue #17460: Remove the strict argument of HTTPConnection and removing the - DeprecationWarning being issued from 3.2 onwards. - -- Issue #16880: Do not assume _imp.load_dynamic() is defined in the imp module. - -- Issue #16389: Fixed a performance regression relative to Python 3.1 in the - caching of compiled regular expressions. - -- Added missing FeedParser and BytesFeedParser to email.parser.__all__. - -- Issue #17431: Fix missing import of BytesFeedParser in email.parser. - -- Issue #12921: http.server's send_error takes an explain argument to send more - information in response. Patch contributed by Karl. - -- Issue #17414: Add timeit, repeat, and default_timer to timeit.__all__. - -- Issue #1285086: Get rid of the refcounting hack and speed up - urllib.parse.unquote() and urllib.parse.unquote_to_bytes(). - -- Issue #17099: Have importlib.find_loader() raise ValueError when __loader__ - is not set, harmonizing with what happens when the attribute is set to None. - -- Expose the O_PATH constant in the os module if it is available. - -- Issue #17368: Fix an off-by-one error in the Python JSON decoder that caused - a failure while decoding empty object literals when object_pairs_hook was - specified. - -- Issue #17385: Fix quadratic behavior in threading.Condition. The FIFO - queue now uses a deque instead of a list. - -- Issue #15806: Add contextlib.ignore(). This creates a context manager to - ignore specified exceptions, replacing the "except SomeException: pass" idiom. - -- Issue #14645: The email generator classes now produce output using the - specified linesep throughout. Previously if the prolog, epilog, or - body were stored with a different linesep, that linesep was used. This - fix corrects an RFC non-compliance issue with smtplib.send_message. - -- Issue #17278: Fix a crash in heapq.heappush() and heapq.heappop() when - the list is being resized concurrently. - -- Issue #16962: Use getdents64 instead of the obsolete getdents syscall - in the subprocess module on Linux. - -- Issue #16935: unittest now counts the module as skipped if it raises SkipTest, - instead of counting it as an error. Patch by Zachary Ware. - -- Issue #17018: Make Process.join() retry if os.waitpid() fails with EINTR. - -- Issue #17223: array module: Fix a crasher when converting an array containing - invalid characters (outside range [U+0000; U+10ffff]) to Unicode: - repr(array), str(array) and array.tounicode(). Patch written by Manuel Jacob. - -- Issue #17197: profile/cProfile modules refactored so that code of run() and - runctx() utility functions is not duplicated in both modules. - -- Issue #14720: sqlite3: Convert datetime microseconds correctly. - Patch by Lowe Thiderman. - -- Issue #15132: Allow a list for the defaultTest argument of - unittest.TestProgram. Patch by Jyrki Pulliainen. - -- Issue #17225: JSON decoder now counts columns in the first line starting - with 1, as in other lines. - -- Issue #6623: Added explicit DeprecationWarning for ftplib.netrc, which has - been deprecated and undocumented for a long time. - -- Issue #13700: Fix byte/string handling in imaplib authentication when an - authobject is specified. - -- Issue #13153: Tkinter functions now raise TclError instead of ValueError when - a string argument contains non-BMP character. - -- Issue #9669: Protect re against infinite loops on zero-width matching in - non-greedy repeat. Patch by Matthew Barnett. - -- Issue #13169: The maximal repetition number in a regular expression has been - increased from 65534 to 2147483647 (on 32-bit platform) or 4294967294 (on - 64-bit). - -- Issue #17143: Fix a missing import in the trace module. Initial patch by - Berker Peksag. - -- Issue #15220: email.feedparser's line splitting algorithm is now simpler and - faster. - -- Issue #16743: Fix mmap overflow check on 32 bit Windows. - -- Issue #16996: webbrowser module now uses shutil.which() to find a - web-browser on the executable search path. - -- Issue #16800: tempfile.gettempdir() no longer left temporary files when - the disk is full. Original patch by Amir Szekely. - -- Issue #17192: Import libffi-3.0.12. - -- Issue #16564: Fixed regression relative to Python2 in the operation of - email.encoders.encode_7or8bit when used with binary data. - -- Issue #17052: unittest discovery should use self.testLoader. - -- Issue #4591: Uid and gid values larger than 2**31 are supported now. - -- Issue #17141: random.vonmisesvariate() no longer hangs for large kappas. - -- Issue #17149: Fix random.vonmisesvariate to always return results in - [0, 2*math.pi]. - -- Issue #1470548: XMLGenerator now works with binary output streams. - -- Issue #6975: os.path.realpath() now correctly resolves multiple nested - symlinks on POSIX platforms. - -- Issue #13773: sqlite3.connect() gets a new `uri` parameter to pass the - filename as a URI, allowing custom options to be passed. - -- Issue #16564: Fixed regression relative to Python2 in the operation of - email.encoders.encode_noop when used with binary data. - -- Issue #10355: The mode, name, encoding and newlines properties now work on - SpooledTemporaryFile objects even when they have not yet rolled over. - Obsolete method xreadline (which has never worked in Python 3) has been - removed. - -- Issue #16686: Fixed a lot of bugs in audioop module. Fixed crashes in - avgpp(), maxpp() and ratecv(). Fixed an integer overflow in add(), bias(), - and ratecv(). reverse(), lin2lin() and ratecv() no more lose precision for - 32-bit samples. max() and rms() no more returns a negative result and - various other functions now work correctly with 32-bit sample -0x80000000. - -- Issue #17073: Fix some integer overflows in sqlite3 module. - -- Issue #16723: httplib.HTTPResponse no longer marked closed when the connection - is automatically closed. - -- Issue #15359: Add CAN_BCM protocol support to the socket module. Patch by - Brian Thorne. - -- Issue #16948: Fix quoted printable body encoding for non-latin1 character - sets in the email package. - -- Issue #16811: Fix folding of headers with no value in the provisional email - policies. - -- Issue #17132: Update symbol for "yield from" grammar changes. - -- Issue #17076: Make copying of xattrs more tolerant of missing FS support. - Patch by Thomas Wouters. - -- Issue #17089: Expat parser now correctly works with string input when the - internal XML encoding is not UTF-8 or US-ASCII. It also now accepts bytes - and strings larger than 2 GiB. - -- Issue #6083: Fix multiple segmentation faults occurred when PyArg_ParseTuple - parses nested mutating sequence. - -- Issue #5289: Fix ctypes.util.find_library on Solaris. - -- Issue #17106: Fix a segmentation fault in io.TextIOWrapper when an underlying - stream or a decoder produces data of an unexpected type (i.e. when - io.TextIOWrapper initialized with text stream or use bytes-to-bytes codec). - -- Issue #17015: When it has a spec, a Mock object now inspects its signature - when matching calls, so that arguments can be matched positionally or - by name. - -- Issue #15633: httplib.HTTPResponse is now mark closed when the server - sends less than the advertised Content-Length. - -- Issue #12268: The io module file object write methods no longer abort early - when one of its write system calls is interrupted (EINTR). - -- Issue #6972: The zipfile module no longer overwrites files outside of - its destination path when extracting malicious zip files. - -- Issue #4844: ZipFile now raises BadZipFile when opens a ZIP file with an - incomplete "End of Central Directory" record. Original patch by Guilherme - Polo and Alan McIntyre. - -- Issue #17071: Signature.bind() now works when one of the keyword arguments - is named ``self``. - -- Issue #12004: Fix an internal error in PyZipFile when writing an invalid - Python file. Patch by Ben Morgan. - -- Have py_compile use importlib as much as possible to avoid code duplication. - Code now raises FileExistsError if the file path to be used for the - byte-compiled file is a symlink or non-regular file as a warning that import - will not keep the file path type if it writes to that path. - -- Issue #16972: Have site.addpackage() consider already known paths even when - none are explicitly passed in. Bug report and fix by Kirill. - -- Issue #1602133: on Mac OS X a shared library build (``--enable-shared``) - now fills the ``os.environ`` variable correctly. - -- Issue #15505: `unittest.installHandler` no longer assumes SIGINT handler is - set to a callable object. - -- Issue #13454: Fix a crash when deleting an iterator created by itertools.tee() - if all other iterators were very advanced before. - -- Issue #12411: Fix to cgi.parse_multipart to correctly use bytes boundaries - and bytes data. Patch by Jonas Wagner. - -- Issue #16957: shutil.which() no longer searches a bare file name in the - current directory on Unix and no longer searches a relative file path with - a directory part in PATH directories. Patch by Thomas Kluyver. - -- Issue #1159051: GzipFile now raises EOFError when reading a corrupted file - with truncated header or footer. - -- Issue #16993: shutil.which() now preserves the case of the path and extension - on Windows. - -- Issue #16992: On Windows in signal.set_wakeup_fd, validate the file - descriptor argument. - -- Issue #16422: For compatibility with the Python version, the C version of - decimal now uses strings instead of integers for rounding mode constants. - -- Issue #15861: tkinter now correctly works with lists and tuples containing - strings with whitespaces, backslashes or unbalanced braces. - -- Issue #9720: zipfile now writes correct local headers for files larger than - 4 GiB. - -- Issue #16955: Fix the poll() method for multiprocessing's socket - connections on Windows. - -- SSLContext.load_dh_params() now properly closes the input file. - -- Issue #15031: Refactor some .pyc management code to cut down on code - duplication. Thanks to Ronan Lamy for the report and taking an initial stab - at the problem. - -- Issue #16398: Optimize deque.rotate() so that it only moves pointers - and doesn't touch the underlying data with increfs and decrefs. - -- Issue #16900: Issue a ResourceWarning when an ssl socket is left unclosed. - -- Issue #13899: ``\A``, ``\Z``, and ``\B`` now correctly match the A, Z, - and B literals when used inside character classes (e.g. ``'[\A]'``). - Patch by Matthew Barnett. - -- Issue #15545: Fix regression in sqlite3's iterdump method where it was - failing if the connection used a row factory (such as sqlite3.Row) that - produced unsortable objects. (Regression was introduced by fix for 9750). - -- fcntl: add F_DUPFD_CLOEXEC constant, available on Linux 2.6.24+. - -- Issue #15972: Fix error messages when os functions expecting a file name or - file descriptor receive the incorrect type. - -- Issue #8109: The ssl module now has support for server-side SNI, thanks - to a :meth:`SSLContext.set_servername_callback` method. Patch by Daniel - Black. - -- Issue #16860: In tempfile, use O_CLOEXEC when available to set the - close-on-exec flag atomically. - -- Issue #16674: random.getrandbits() is now 20-40% faster for small integers. - -- Issue #16009: JSON error messages now provide more information. - -- Issue #16828: Fix error incorrectly raised by bz2.compress(b'') and - bz2.BZ2Compressor.compress(b''). Initial patch by Martin Packman. - -- Issue #16833: In http.client.HTTPConnection, do not concatenate the request - headers and body when the payload exceeds 16 KB, since it can consume more - memory for no benefit. Patch by Benno Leslie. - -- Issue #16541: tk_setPalette() now works with keyword arguments. - -- Issue #16820: In configparser, `parser.popitem()` no longer raises ValueError. - This makes `parser.clean()` work correctly. - -- Issue #16820: In configparser, ``parser['section'] = {}`` now preserves - section order within the parser. This makes `parser.update()` preserve section - order as well. - -- Issue #16820: In configparser, ``parser['DEFAULT'] = {}`` now correctly - clears previous values stored in the default section. Same goes for - ``parser.update({'DEFAULT': {}})``. - -- Issue #9586: Redefine SEM_FAILED on MacOSX to keep compiler happy. - -- Issue #16787: Increase asyncore and asynchat default output buffers size, to - decrease CPU usage and increase throughput. - -- Issue #10527: make multiprocessing use poll() instead of select() if available. - -- Issue #16688: Now regexes contained backreferences correctly work with - non-ASCII strings. Patch by Matthew Barnett. - -- Issue #16486: Make aifc files act as context managers. - -- Issue #16485: Now file descriptors are closed if file header patching failed - on closing an aifc file. - -- Issue #16640: Run less code under a lock in sched module. - -- Issue #16165: sched.scheduler.run() no longer blocks a scheduler for other - threads. - -- Issue #16641: Default values of sched.scheduler.enter() are no longer - modifiable. - -- Issue #16618: Make glob.glob match consistently across strings and bytes - regarding leading dots. Patch by Serhiy Storchaka. - -- Issue #16788: Add samestat to Lib/ntpath.py - -- Issue #16713: Parsing of 'tel' urls using urlparse separates params from - path. - -- Issue #16443: Add docstrings to regular expression match objects. - Patch by Anton Kasyanov. - -- Issue #15701: Fix HTTPError info method call to return the headers information. - -- Issue #16752: Add a missing import to modulefinder. Patch by Berker Peksag. - -- Issue #16646: ftplib.FTP.makeport() might lose socket error details. - (patch by Serhiy Storchaka) - -- Issue #16626: Fix infinite recursion in glob.glob() on Windows when the - pattern contains a wildcard in the drive or UNC path. Patch by Serhiy - Storchaka. - -- Issue #15783: Except for the number methods, the C version of decimal now - supports all None default values present in decimal.py. These values were - largely undocumented. - -- Issue #11175: argparse.FileType now accepts encoding and errors - arguments. Patch by Lucas Maystre. - -- Issue #16488: epoll() objects now support the `with` statement. Patch - by Serhiy Storchaka. - -- Issue #16298: In HTTPResponse.read(), close the socket when there is no - Content-Length and the incoming stream is finished. Patch by Eran - Rundstein. - -- Issue #16049: Add abc.ABC class to enable the use of inheritance to create - ABCs, rather than the more cumbersome metaclass=ABCMeta. Patch by Bruno - Dupuis. - -- Expose the TCP_FASTOPEN and MSG_FASTOPEN flags in socket when they're - available. - -- Issue #15701: Add a .headers attribute to urllib.error.HTTPError. Patch - contributed by Berker Peksag. - -- Issue #15872: Fix 3.3 regression introduced by the new fd-based shutil.rmtree - that caused it to not ignore certain errors when ignore_errors was set. - Patch by Alessandro Moura and Serhiy Storchaka. - -- Issue #16248: Disable code execution from the user's home directory by - tkinter when the -E flag is passed to Python. Patch by Zachary Ware. - -- Issue #13390: New function :func:`sys.getallocatedblocks()` returns the - number of memory blocks currently allocated. - -- Issue #16628: Fix a memory leak in ctypes.resize(). - -- Issue #13614: Fix setup.py register failure with invalid rst in description. - Patch by Julien Courteau and Pierre Paul Lefebvre. - -- Issue #13512: Create ~/.pypirc securely (CVE-2011-4944). Initial patch by - Philip Jenvey, tested by Mageia and Debian. - -- Issue #7719: Make distutils ignore ``.nfs*`` files instead of choking later - on. Initial patch by SilentGhost and Jeff Ramnani. - -- Issue #13120: Allow calling pdb.set_trace() from thread. - Patch by Ilya Sandler. - -- Issue #16585: Make CJK encoders support error handlers that return bytes per - PEP 383. - -- Issue #10182: The re module doesn't truncate indices to 32 bits anymore. - Patch by Serhiy Storchaka. - -- Issue #16333: use (",", ": ") as default separator in json when indent is - specified, to avoid trailing whitespace. Patch by Serhiy Storchaka. - -- Issue #16573: In 2to3, treat enumerate() like a consuming call, so superfluous - list() calls aren't added to filter(), map(), and zip() which are directly - passed enumerate(). - -- Issue #16464: Reset the Content-Length header when a urllib Request is reused - with new data. - -- Issue #12848: The pure Python pickle implementation now treats object - lengths as unsigned 32-bit integers, like the C implementation does. - Patch by Serhiy Storchaka. - -- Issue #16423: urllib.request now has support for ``data:`` URLs. Patch by - Mathias Panzenböck. - -- Issue #4473: Add a POP3.stls() to switch a clear-text POP3 session into - an encrypted POP3 session, on supported servers. Patch by Lorenzo Catucci. - -- Issue #4473: Add a POP3.capa() method to query the capabilities advertised - by the POP3 server. Patch by Lorenzo Catucci. - -- Issue #4473: Ensure the socket is shutdown cleanly in POP3.close(). - Patch by Lorenzo Catucci. - -- Issue #16522: added FAIL_FAST flag to doctest. - -- Issue #15627: Add the importlib.abc.InspectLoader.source_to_code() method. - -- Issue #16408: Fix file descriptors not being closed in error conditions - in the zipfile module. Patch by Serhiy Storchaka. - -- Issue #14631: Add a new :class:`weakref.WeakMethod` to simulate weak - references to bound methods. - -- Issue #16469: Fix exceptions from float -> Fraction and Decimal -> Fraction - conversions for special values to be consistent with those for float -> int - and Decimal -> int. Patch by Alexey Kachayev. - -- Issue #16481: multiprocessing no longer leaks process handles on Windows. - -- Issue #12428: Add a pure Python implementation of functools.partial(). - Patch by Brian Thorne. - -- Issue #16140: The subprocess module no longer double closes its child - subprocess.PIPE parent file descriptors on child error prior to exec(). - -- Remove a bare print to stdout from the subprocess module that could have - happened if the child process wrote garbage to its pre-exec error pipe. - -- The subprocess module now raises its own SubprocessError instead of a - RuntimeError in various error situations which should not normally happen. - -- Issue #16327: The subprocess module no longer leaks file descriptors - used for stdin/stdout/stderr pipes to the child when fork() fails. - -- Issue #14396: Handle the odd rare case of waitpid returning 0 when not - expected in subprocess.Popen.wait(). - -- Issue #16411: Fix a bug where zlib.decompressobj().flush() might try to access - previously-freed memory. Patch by Serhiy Storchaka. - -- Issue #16357: fix calling accept() on a SSLSocket created through - SSLContext.wrap_socket(). Original patch by Jeff McNeil. - -- Issue #16409: The reporthook callback made by the legacy - urllib.request.urlretrieve API now properly supplies a constant non-zero - block_size as it did in Python 3.2 and 2.7. This matches the behavior of - urllib.request.URLopener.retrieve. - -- Issue #16431: Use the type information when constructing a Decimal subtype - from a Decimal argument. - -- Issue #15641: Clean up deprecated classes from importlib. - Patch by Taras Lyapun. - -- Issue #16350: zlib.decompressobj().decompress() now accumulates data from - successive calls after EOF in unused_data, instead of only saving the argument - to the last call. decompressobj().flush() now correctly sets unused_data and - unconsumed_tail. A bug in the handling of MemoryError when setting the - unconsumed_tail attribute has also been fixed. Patch by Serhiy Storchaka. - -- Issue #12759: sre_parse now raises a proper error when the name of the group - is missing. Initial patch by Serhiy Storchaka. - -- Issue #16152: fix tokenize to ignore whitespace at the end of the code when - no newline is found. Patch by Ned Batchelder. - -- Issue #16284: Prevent keeping unnecessary references to worker functions - in concurrent.futures ThreadPoolExecutor. - -- Issue #16230: Fix a crash in select.select() when one of the lists changes - size while iterated on. Patch by Serhiy Storchaka. - -- Issue #16228: Fix a crash in the json module where a list changes size - while it is being encoded. Patch by Serhiy Storchaka. - -- Issue #16351: New function gc.get_stats() returns per-generation collection - statistics. - -- Issue #14897: Enhance error messages of struct.pack and - struct.pack_into. Patch by Matti Mäki. - -- Issue #16316: mimetypes now recognizes the .xz and .txz (.tar.xz) extensions. - Patch by Serhiy Storchaka. - -- Issue #12890: cgitb no longer prints spurious <p> tags in text - mode when the logdir option is specified. - -- Issue #16307: Fix multiprocessing.Pool.map_async not calling its callbacks. - Patch by Janne Karila. - -- Issue #16305: Fix a segmentation fault occurring when interrupting - math.factorial. - -- Issue #16116: Fix include and library paths to be correct when building C - extensions in venvs. - -- Issue #16245: Fix the value of a few entities in html.entities.html5. - -- Issue #16301: Fix the localhost verification in urllib/request.py for ``file://`` - urls. - -- Issue #16250: Fix the invocations of URLError which had misplaced filename - attribute for exception. - -- Issue #10836: Fix exception raised when file not found in urlretrieve - Initial patch by Ezio Melotti. - -- Issue #14398: Fix size truncation and overflow bugs in the bz2 module. - -- Issue #12692: Fix resource leak in urllib.request when talking to an HTTP - server that does not include a ``Connection: close`` header in its responses. - -- Issue #12034: Fix bogus caching of result in check_GetFinalPathNameByHandle. - Patch by Atsuo Ishimoto. - -- Improve performance of `lzma.LZMAFile` (see also issue #16034). - -- Issue #16220: wsgiref now always calls close() on an iterable response. - Patch by Brent Tubbs. - -- Issue #16270: urllib may hang when used for retrieving files via FTP by using - a context manager. Patch by Giampaolo Rodola'. - -- Issue #16461: Wave library should be able to deal with 4GB wav files, - and sample rate of 44100 Hz. - -- Issue #16176: Properly identify Windows 8 via platform.platform() - -- Issue #16088: BaseHTTPRequestHandler's send_error method includes a - Content-Length header in its response now. Patch by Antoine Pitrou. - -- Issue #16114: The subprocess module no longer provides a misleading error - message stating that args[0] did not exist when either the cwd or executable - keyword arguments specified a path that did not exist. - -- Issue #16169: Fix ctypes.WinError()'s confusion between errno and winerror. - -- Issue #16110: logging.fileConfig now accepts a pre-initialised ConfigParser - instance. - -- Issue #1492704: shutil.copyfile() raises a distinct SameFileError now if - source and destination are the same file. Patch by Atsuo Ishimoto. - -- Issue #13896: Make shelf instances work with 'with' as context managers. - Original patch by Filip Gruszczyński. - -- Issue #15417: Add support for csh and fish in venv activation scripts. - -- Issue #14377: ElementTree.write and some of the module-level functions have - a new parameter - *short_empty_elements*. It controls how elements with no - contents are emitted. - -- Issue #16089: Allow ElementTree.TreeBuilder to work again with a non-Element - element_factory (fixes a regression in SimpleTAL). - -- Issue #9650: List commonly used format codes in time.strftime and - time.strptime docsttings. Original patch by Mike Hoy. - -- Issue #15452: logging configuration socket listener now has a verify option - that allows an application to apply a verification function to the - received configuration data before it is acted upon. - -- Issue #16034: Fix performance regressions in the new `bz2.BZ2File` - implementation. Initial patch by Serhiy Storchaka. - -- `pty.spawn()` now returns the child process status returned by `os.waitpid()`. - -- Issue #15756: `subprocess.poll()` now properly handles `errno.ECHILD` to - return a returncode of 0 when the child has already exited or cannot be waited - on. - -- Issue #15323: Improve failure message of `Mock.assert_called_once_with()`. - -- Issue #16064: ``unittest -m`` claims executable is "python", not "python3". - -- Issue #12376: Pass on parameters in `TextTestResult.__init__()` super call. - -- Issue #15222: Insert blank line after each message in mbox mailboxes. - -- Issue #16013: Fix `csv.Reader` parsing issue with ending quote characters. - Patch by Serhiy Storchaka. - -- Issue #15421: Fix an OverflowError in `Calendar.itermonthdates()` after - `datetime.MAXYEAR`. Patch by Cédric Krier. - -- Issue #16112: platform.architecture does not correctly escape argument to - /usr/bin/file. Patch by David Benjamin. - -- Issue #15970: `xml.etree.ElementTree` now serializes correctly the empty HTML - elements 'meta' and 'param'. - -- Issue #15842: The `SocketIO.{readable,writable,seekable}` methods now raise - ValueError when the file-like object is closed. Patch by Alessandro Moura. - -- Issue #15876: Fix a refleak in the `curses` module: window.encoding. - -- Issue #15881: Fix `atexit` hook in `multiprocessing`. Original patch by Chris - McDonough. - -- Issue #15841: The readable(), writable() and seekable() methods of - `io.BytesIO` and `io.StringIO` objects now raise ValueError when the object - has been closed. Patch by Alessandro Moura. - -- Issue #15447: Use `subprocess.DEVNULL` in webbrowser, instead of opening - `os.devnull` explicitly and leaving it open. - -- Issue #15509: `webbrowser.UnixBrowser` no longer passes empty arguments to - Popen when ``%action`` substitutions produce empty strings. - -- Issue #12776, issue #11839: Call `argparse` type function (specified by - add_argument) only once. Before, the type function was called twice in the - case where the default was specified and the argument was given as well. This - was especially problematic for the FileType type, as a default file would - always be opened, even if a file argument was specified on the command line. - -- Issue #15906: Fix a regression in argparse caused by the preceding change, - when ``action='append'``, ``type='str'`` and ``default=[]``. - -- Issue #16113: Added sha3 module based on the Keccak reference implementation - 3.2. The `hashlib` module has four additional hash algorithms: `sha3_224`, - `sha3_256`, `sha3_384` and `sha3_512`. As part of the patch some common - code was moved from _hashopenssl.c to hashlib.h. - -- ctypes.call_commethod was removed, since its only usage was in the defunct - samples directory. - -- Issue #16692: Added TLSv1.1 and TLSv1.2 support for the ssl modules. - -- Issue #16832: add abc.get_cache_token() to expose cache validity checking - support in ABCMeta. - -IDLE ----- - -- Issue #18429: Format / Format Paragraph, now works when comment blocks - are selected. As with text blocks, this works best when the selection - only includes complete lines. - -- Issue #18226: Add docstrings and unittests for FormatParagraph.py. - Original patches by Todd Rovito and Phil Webster. - -- Issue #18279: Format - Strip trailing whitespace no longer marks a file as - changed when it has not been changed. This fix followed the addition of a - test file originally written by Phil Webster (the issue's main goal). - -- Issue #7136: In the Idle File menu, "New Window" is renamed "New File". - Patch by Tal Einat, Roget Serwy, and Todd Rovito. - -- Remove dead imports of imp. - -- Issue #18196: Avoid displaying spurious SystemExit tracebacks. - -- Issue #5492: Avoid traceback when exiting IDLE caused by a race condition. - -- Issue #17511: Keep IDLE find dialog open after clicking "Find Next". - Original patch by Sarah K. - -- Issue #18055: Move IDLE off of imp and on to importlib. - -- Issue #15392: Create a unittest framework for IDLE. - Initial patch by Rajagopalasarma Jayakrishnan. - See Lib/idlelib/idle_test/README.txt for how to run Idle tests. - -- Issue #14146: Highlight source line while debugging on Windows. - -- Issue #17838: Allow sys.stdin to be reassigned. - -- Issue #13495: Avoid loading the color delegator twice in IDLE. - -- Issue #17798: Allow IDLE to edit new files when specified on command line. - -- Issue #14735: Update IDLE docs to omit "Control-z on Windows". - -- Issue #17532: Always include Options menu for IDLE on OS X. - Patch by Guilherme Simões. - -- Issue #17585: Fixed IDLE regression. Now closes when using exit() or quit(). - -- Issue #17657: Show full Tk version in IDLE's about dialog. - Patch by Todd Rovito. - -- Issue #17613: Prevent traceback when removing syntax colorizer in IDLE. - -- Issue #1207589: Backwards-compatibility patch for right-click menu in IDLE. - -- Issue #16887: IDLE now accepts Cancel in tabify/untabify dialog box. - -- Issue #17625: In IDLE, close the replace dialog after it is used. - -- Issue #14254: IDLE now handles readline correctly across shell restarts. - -- Issue #17614: IDLE no longer raises exception when quickly closing a file. - -- Issue #6698: IDLE now opens just an editor window when configured to do so. - -- Issue #8900: Using keyboard shortcuts in IDLE to open a file no longer - raises an exception. - -- Issue #6649: Fixed missing exit status in IDLE. Patch by Guilherme Polo. - -- Issue #17114: IDLE now uses non-strict config parser. - -- Issue #9290: In IDLE the sys.std* streams now implement io.TextIOBase - interface and support all mandatory methods and properties. - -- Issue #5066: Update IDLE docs. Patch by Todd Rovito. - -- Issue #16829: IDLE printing no longer fails if there are spaces or other - special characters in the file path. - -- Issue #16491: IDLE now prints chained exception tracebacks. - -- Issue #16819: IDLE method completion now correctly works for bytes literals. - -- Issue #16504: IDLE now catches SyntaxErrors raised by tokenizer. Patch by - Roger Serwy. - -- Issue #16511: Use default IDLE width and height if config param is not valid. - Patch Serhiy Storchaka. - -- Issue #1207589: Add Cut/Copy/Paste items to IDLE right click Context Menu. - Patch by Todd Rovito. - -- Issue #16123: IDLE - deprecate running without a subprocess. - Patch by Roger Serwy. - -Tests ------ - -- Issue #1666318: Add a test that shutil.copytree() retains directory - permissions. Patch by Catherine Devlin. - -- Issue #18273: move the tests in Lib/test/json_tests to Lib/test/test_json - and make them discoverable by unittest. Patch by Zachary Ware. - -- Fix a fcntl test case on KFreeBSD, Debian #708653 (Petr Salinger). - -- Issue #18396: Fix spurious test failure in test_signal on Windows when - faulthandler is enabled (Patch by Jeremy Kloth) - -- Issue #17046: Fix broken test_executable_without_cwd in test_subprocess. - -- Issue #15415: Add new temp_dir() and change_cwd() context managers to - test.support, and refactor temp_cwd() to use them. Patch by Chris Jerdonek. - -- Issue #15494: test.support is now a package rather than a module (Initial - patch by Indra Talip) - -- Issue #17944: test_zipfile now discoverable and uses subclassing to - generate tests for different compression types. Fixed a bug with skipping - some tests due to use of exhausted iterators. - -- Issue #18266: test_largefile now works with unittest test discovery and - supports running only selected tests. Patch by Zachary Ware. - -- Issue #17767: test_locale now works with unittest test discovery. - Original patch by Zachary Ware. - -- Issue #18375: Assume --randomize when --randseed is used for running the - testsuite. - -- Issue #11185: Fix test_wait4 under AIX. Patch by Sébastien Sablé. - -- Issue #18207: Fix test_ssl for some versions of OpenSSL that ignore seconds - in ASN1_TIME fields. - -- Issue #18094: test_uuid no longer reports skipped tests as passed. - -- Issue #17992: Add timeouts to asyncore and asynchat tests so that they won't - accidentally hang. - -- Issue #17833: Fix test_gdb failures seen on machines where debug symbols - for glibc are available (seen on PPC64 Linux). - -- Issue #7855: Add tests for ctypes/winreg for issues found in IronPython. - Initial patch by Dino Viehland. - -- Issue #11078: test___all__ now checks for duplicates in __all__. - Initial patch by R. David Murray. - -- Issue #17712: Fix test_gdb failures on Ubuntu 13.04. - -- Issue #17835: Fix test_io when the default OS pipe buffer size is larger - than one million bytes. - -- Issue #17065: Use process-unique key for winreg tests to avoid failures if - test is run multiple times in parallel (eg: on a buildbot host). - -- Issue #12820: add tests for the xml.dom.minicompat module. - Patch by John Chandler and Phil Connell. - -- Issue #17691: test_univnewlines now works with unittest test discovery. - Patch by Zachary Ware. - -- Issue #17790: test_set now works with unittest test discovery. - Patch by Zachary Ware. - -- Issue #17789: test_random now works with unittest test discovery. - Patch by Zachary Ware. - -- Issue #17779: test_osx_env now works with unittest test discovery. - Patch by Zachary Ware. - -- Issue #17766: test_iterlen now works with unittest test discovery. - Patch by Zachary Ware. - -- Issue #17690: test_time now works with unittest test discovery. - Patch by Zachary Ware. - -- Issue #17692: test_sqlite now works with unittest test discovery. - Patch by Zachary Ware. - -- Issue #11995: test_pydoc doesn't import all sys.path modules anymore. - -- Issue #17448: test_sax now skips if there are no xml parsers available - instead of raising an ImportError. - -- Issue #11420: make test suite pass with -B/DONTWRITEBYTECODE set. - Initial patch by Thomas Wouters. - -- Issue #10652: make tcl/tk tests run after __all__ test, patch by - Zachary Ware. - -- Issue #11963: remove human verification from test_parser and test_subprocess. - -- Issue #11732: add a new suppress_crash_popup() context manager to test.support - that disables crash popups on Windows and use it in test_faulthandler and - test_capi. - -- Issue #13898: test_ssl no longer prints a spurious stack trace on Ubuntu. - -- Issue #17283: Share code between `__main__.py` and `regrtest.py` in - `Lib/test`. - -- Issue #17249: convert a test in test_capi to use unittest and reap threads. - -- Issue #17107: Test client-side SNI support in urllib.request thanks to - the new server-side SNI support in the ssl module. Initial patch by - Daniel Black. - -- Issue #17041: Fix testing when Python is configured with the - --without-doc-strings. - -- Issue #16923: Fix ResourceWarnings in test_ssl. - -- Issue #15539: Added regression tests for Tools/scripts/pindent.py. - -- Issue #17479: test_io now works with unittest test discovery. - Patch by Zachary Ware. - -- Issue #17066: test_robotparser now works with unittest test discovery. - Patch by Zachary Ware. - -- Issue #17334: test_index now works with unittest test discovery. - Patch by Zachary Ware. - -- Issue #17333: test_imaplib now works with unittest test discovery. - Patch by Zachary Ware. - -- Issue #17082: test_dbm* now work with unittest test discovery. - Patch by Zachary Ware. - -- Issue #17079: test_ctypes now works with unittest test discovery. - Patch by Zachary Ware. - -- Issue #17304: test_hash now works with unittest test discovery. - Patch by Zachary Ware. - -- Issue #17303: test_future* now work with unittest test discovery. - Patch by Zachary Ware. - -- Issue #17163: test_file now works with unittest test discovery. - Patch by Zachary Ware. - -- Issue #16925: test_configparser now works with unittest test discovery. - Patch by Zachary Ware. - -- Issue #16918: test_codecs now works with unittest test discovery. - Patch by Zachary Ware. - -- Issue #16919: test_crypt now works with unittest test discovery. - Patch by Zachary Ware. - -- Issue #16910: test_bytes, test_unicode, and test_userstring now work with - unittest test discovery. Patch by Zachary Ware. - -- Issue #16905: test_warnings now works with unittest test discovery. - Initial patch by Berker Peksag. - -- Issue #16898: test_bufio now works with unittest test discovery. - Patch by Zachary Ware. - -- Issue #16888: test_array now works with unittest test discovery. - Patch by Zachary Ware. - -- Issue #16896: test_asyncore now works with unittest test discovery. - Patch by Zachary Ware. - -- Issue #16897: test_bisect now works with unittest test discovery. - Initial patch by Zachary Ware. - -- Issue #16852: test_genericpath, test_posixpath, test_ntpath, and test_macpath - now work with unittest test discovery. Patch by Zachary Ware. - -- Issue #16748: test_heapq now works with unittest test discovery. - -- Issue #10646: Tests rearranged for os.samefile/samestat to check for not - just symlinks but also hard links. - -- Issue #15302: Switch regrtest from using getopt to using argparse. - -- Issue #15324: Fix regrtest parsing of --fromfile, --match, and --randomize - options. - -- Issue #16702: test_urllib2_localnet tests now correctly ignores proxies for - localhost tests. - -- Issue #16664: Add regression tests for glob's behaviour concerning entries - starting with a ".". Patch by Sebastian Kreft. - -- Issue #13390: The ``-R`` option to regrtest now also checks for memory - allocation leaks, using :func:`sys.getallocatedblocks()`. - -- Issue #16559: Add more tests for the json module, including some from the - official test suite at json.org. Patch by Serhiy Storchaka. - -- Issue #16661: Fix the `os.getgrouplist()` test by not assuming that it gives - the same output as :command:`id -G`. - -- Issue #16115: Add some tests for the executable argument to - subprocess.Popen(). Initial patch by Kushal Das. - -- Issue #16126: PyErr_Format format mismatch in _testcapimodule.c. - Patch by Serhiy Storchaka. - -- Issue #15304: Fix warning message when `os.chdir()` fails inside - `test.support.temp_cwd()`. Patch by Chris Jerdonek. - -- Issue #15802: Fix test logic in `TestMaildir.test_create_tmp()`. Patch by - Serhiy Storchaka. - -- Issue #15557: Added a test suite for the webbrowser module, thanks to Anton - Barkovsky. - -- Issue #16698: Skip posix test_getgroups when built with OS X - deployment target prior to 10.6. - -Build ------ - -- Issue #16067: Add description into MSI file to replace installer's - temporary name. - -- Issue #18257: Fix readlink usage in python-config. Install the python - version again on Darwin. - -- Issue #18481: Add C coverage reporting with gcov and lcov. A new make target - "coverage-report" creates an instrumented Python build, runs unit tests - and creates a HTML. The report can be updated with "make coverage-lcov". - -- Issue #17845: Clarified the message printed when some module are not built. - -- Issue #18256: Compilation fix for recent AIX releases. Patch by - David Edelsohn. - -- Issue #17547: In configure, explicitly pass -Wformat for the benefit for GCC - 4.8. - -- Issue #15172: Document NASM 2.10+ as requirement for building OpenSSL 1.0.1 - on Windows. - -- Issue #17591: Use lowercase filenames when including Windows header files. - Patch by Roumen Petrov. - -- Issue #17550: Fix the --enable-profiling configure switch. - -- Issue #17425: Build with openssl 1.0.1d on Windows. - -- Issue #16754: Fix the incorrect shared library extension on linux. Introduce - two makefile macros SHLIB_SUFFIX and EXT_SUFFIX. SO now has the value of - SHLIB_SUFFIX again (as in 2.x and 3.1). The SO macro is removed in 3.4. - -- Issue #5033: Fix building of the sqlite3 extension module when the - SQLite library version has "beta" in it. Patch by Andreas Pelme. - -- Issue #17228: Fix building without pymalloc. - -- Issue #3718: Use AC_ARG_VAR to set MACHDEP in configure.ac. - -- Issue #16235: Implement python-config as a shell script. - -- Issue #16769: Remove outdated Visual Studio projects. - -- Issue #17031: Fix running regen in cross builds. - -- Issue #3754: fix typo in pthread AC_CACHE_VAL. - -- Issue #15484: Fix _PYTHON_PROJECT_BASE for srcdir != builddir builds; - use _PYTHON_PROJECT_BASE in distutils/sysconfig.py. - -- Drop support for Windows 2000 (changeset e52df05b496a). - -- Issue #17029: Let h2py search the multiarch system include directory. - -- Issue #16953: Fix socket module compilation on platforms with - HAVE_BROKEN_POLL. Patch by Jeffrey Armstrong. - -- Issue #16320: Remove redundant Makefile dependencies for strings and bytes. - -- Cross compiling needs host and build settings. configure no longer - creates a broken PYTHON_FOR_BUILD variable when --build is missing. - -- Fix cross compiling issue in setup.py, ensure that lib_dirs and inc_dirs are - defined in cross compiling mode, too. - -- Issue #16836: Enable IPv6 support even if IPv6 is disabled on the build host. - -- Issue #16593: Have BSD 'make -s' do the right thing, thanks to Daniel Shahaf - -- Issue #16262: fix out-of-src-tree builds, if mercurial is not installed. - -- Issue #15298: ensure _sysconfigdata is generated in build directory, not - source directory. - -- Issue #15833: Fix a regression in 3.3 that resulted in exceptions being - raised if importlib failed to write byte-compiled files. This affected - attempts to build Python out-of-tree from a read-only source directory. - -- Issue #15923: Fix a mistake in ``asdl_c.py`` that resulted in a TypeError - after 2801bf875a24 (see #15801). - -- Issue #16135: Remove OS/2 support. - -- Issue #15819: Make sure we can build Python out-of-tree from a read-only - source directory. (Somewhat related to issue #9860.) - -- Issue #15587: Enable Tk high-resolution text rendering on Macs with - Retina displays. Applies to Tkinter apps, such as IDLE, on OS X - framework builds linked with Cocoa Tk 8.5. - -- Issue #17161: make install now also installs a python3 man page. - -C-API ------ - -- Issue #18351: Fix various issues in a function in importlib provided to help - PyImport_ExecCodeModuleWithPathnames() (and thus by extension - PyImport_ExecCodeModule() and PyImport_ExecCodeModuleEx()). - -- Issue #9369: The types of `char*` arguments of PyObject_CallFunction() and - PyObject_CallMethod() now changed to `const char*`. Based on patches by - Jörg Müller and Lars Buitinck. - -- Issue #17206: Py_CLEAR(), Py_DECREF(), Py_XINCREF() and Py_XDECREF() now - expand their arguments once instead of multiple times. Patch written by Illia - Polosukhin. - -- Issue #17522: Add the PyGILState_Check() API. - -- Issue #17327: Add PyDict_SetDefault. - -- Issue #16881: Fix Py_ARRAY_LENGTH macro for GCC < 3.1. - -- Issue #16505: Remove unused Py_TPFLAGS_INT_SUBCLASS. - -- Issue #16086: PyTypeObject.tp_flags and PyType_Spec.flags are now unsigned - (unsigned long and unsigned int) to avoid an undefined behaviour with - Py_TPFLAGS_TYPE_SUBCLASS ((1 << 31). PyType_GetFlags() result type is - now unsigned too (unsigned long, instead of long). - -- Issue #16166: Add PY_LITTLE_ENDIAN and PY_BIG_ENDIAN macros and unified - endianness detection and handling. - -Documentation -------------- - -- Issue #23006: Improve the documentation and indexing of dict.__missing__. - Add an entry in the language datamodel special methods section. - Revise and index its discussion in the stdtypes mapping/dict section. - -- Issue #17701: Improving strftime documentation. - -- Issue #18440: Clarify that `hash()` can truncate the value returned from an - object's custom `__hash__()` method. - -- Issue #17844: Add links to encoders and decoders for bytes-to-bytes codecs. - -- Issue #14097: improve the "introduction" page of the tutorial. - -- Issue #17977: The documentation for the cadefault argument's default value - in urllib.request.urlopen() is fixed to match the code. - -- Issue #6696: add documentation for the Profile objects, and improve - profile/cProfile docs. Patch by Tom Pinckney. - -- Issue #15940: Specify effect of locale on time functions. - -- Issue #17538: Document XML vulnerabilties - -- Issue #16642: sched.scheduler timefunc initial default is time.monotonic. - Patch by Ramchandra Apte - -- Issue #17047: remove doubled words in docs and docstrings - reported by Serhiy Storchaka and Matthew Barnett. - -- Issue #15465: Document the versioning macros in the C API docs rather than - the standard library docs. Patch by Kushal Das. - -- Issue #16406: Combine the pages for uploading and registering to PyPI. - -- Issue #16403: Document how distutils uses the maintainer field in - PKG-INFO. Patch by Jyrki Pulliainen. - -- Issue #16695: Document how glob handles filenames starting with a - dot. Initial patch by Jyrki Pulliainen. - -- Issue #8890: Stop advertising an insecure practice by replacing uses - of the /tmp directory with better alternatives in the documentation. - Patch by Geoff Wilson. - -- Issue #17203: add long option names to unittest discovery docs. - -- Issue #13094: add "Why do lambdas defined in a loop with different values - all return the same result?" programming FAQ. - -- Issue #14901: Update portions of the Windows FAQ. - Patch by Ashish Nitin Patil. - -- Issue #16267: Better document the 3.3+ approach to combining - @abstractmethod with @staticmethod, @classmethod and @property - -- Issue #15209: Clarify exception chaining description in exceptions module - documentation - -- Issue #15990: Improve argument/parameter documentation. - -- Issue #16209: Move the documentation for the str built-in function to a new - str class entry in the "Text Sequence Type" section. - -- Issue #13538: Improve str() and object.__str__() documentation. - -- Issue #16489: Make it clearer that importlib.find_loader() needs parent - packages to be explicitly imported. - -- Issue #16400: Update the description of which versions of a given package - PyPI displays. - -- Issue #15677: Document that zlib and gzip accept a compression level of 0 to - mean 'no compression'. Patch by Brian Brazil. - -- Issue #16197: Update winreg docstrings and documentation to match code. - Patch by Zachary Ware. - -- Issue #8040: added a version switcher to the documentation. Patch by - Yury Selivanov. - -- Issue #16241: Document -X faulthandler command line option. - Patch by Marek Šuppa. - -- Additional comments and some style changes in the concurrent.futures URL - retrieval example - -- Issue #16115: Improve subprocess.Popen() documentation around args, shell, - and executable arguments. - -- Issue #13498: Clarify docs of os.makedirs()'s exist_ok argument. Done with - great native-speaker help from R. David Murray. - -- Issue #15533: Clarify docs and add tests for `subprocess.Popen()`'s cwd - argument. - -- Issue #15979: Improve timeit documentation. - -- Issue #16036: Improve documentation of built-in `int()`'s signature and - arguments. - -- Issue #15935: Clarification of `argparse` docs, re: add_argument() type and - default arguments. Patch contributed by Chris Jerdonek. - -- Issue #11964: Document a change in v3.2 to the behavior of the indent - parameter of json encoding operations. - -- Issue #15116: Remove references to appscript as it is no longer being - supported. - -Tools/Demos ------------ - -- Issue #18817: Fix a resource warning in Lib/aifc.py demo. Patch by - Vajrasky Kok. - -- Issue #18439: Make patchcheck work on Windows for ACKS, NEWS. - -- Issue #18448: Fix a typo in Tools/demo/eiffel.py. - -- Issue #18457: Fixed saving of formulas and complex numbers in - Tools/demo/ss1.py. - -- Issue #18449: Make Tools/demo/ss1.py work again on Python 3. Patch by - Févry Thibault. - -- Issue #12990: The "Python Launcher" on OSX could not launch python scripts - that have paths that include wide characters. - -- Issue #15239: Make mkstringprep.py work again on Python 3. - -- Issue #17028: Allowed Python arguments to be supplied to the Windows - launcher. - -- Issue #17156: pygettext.py now detects the encoding of source files and - correctly writes and escapes non-ascii characters. - -- Issue #15539: Fix a number of bugs in Tools/scripts/pindent.py. Now - pindent.py works with a "with" statement. pindent.py no longer produces - improper indentation. pindent.py now works with continued lines broken after - "class" or "def" keywords and with continuations at the start of line. - -- Issue #11797: Add a 2to3 fixer that maps reload() to imp.reload(). - -- Issue #10966: Remove the concept of unexpected skipped tests. - -- Issue #9893: Removed the Misc/Vim directory. - -- Removed the Misc/TextMate directory. - -- Issue #16245: Add the Tools/scripts/parse_html5_entities.py script to parse - the list of HTML5 entities and update the html.entities.html5 dictionary. - -- Issue #15378: Fix Tools/unicode/comparecodecs.py. Patch by Serhiy Storchaka. - -- Issue #16549: Make json.tool work again on Python 3 and add tests. - Initial patch by Berker Peksag and Serhiy Storchaka. - -- Issue #13301: use ast.literal_eval() instead of eval() in Tools/i18n/msgfmt.py. - Patch by Serhiy Storchaka. - -Windows -------- - -- Issue #18569: The installer now adds .py to the PATHEXT variable when extensions - are registered. Patch by Paul Moore. - **(For information about older versions, consult the HISTORY file.)** |