diff options
Diffstat (limited to 'Misc/HISTORY')
| -rw-r--r-- | Misc/HISTORY | 6467 |
1 files changed, 6467 insertions, 0 deletions
diff --git a/Misc/HISTORY b/Misc/HISTORY index 9655d4cd40..4ce431f660 100644 --- a/Misc/HISTORY +++ b/Misc/HISTORY @@ -7,6 +7,6473 @@ As you read on you go back to the dark ages of Python's history. ====================================================================== +What's New in Python 3.4.6? +=========================== + +Release date: 2017-01-17 + +There were no changes between 3.4.6rc1 and 3.4.6 final. + + +What's New in Python 3.4.6rc1? +============================== + +Release date: 2017-01-02 + +Core and Builtins +----------------- + +- Issue #28648: Fixed crash in Py_DecodeLocale() in debug build on Mac OS X + when decode astral characters. Patch by Xiang Zhang. + +- Issue #28426: Fixed potential crash in PyUnicode_AsDecodedObject() in debug + build. + +Library +------- + +- 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. + +- 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 #27759: Fix selectors incorrectly retain invalid file descriptors. + Patch by Mark Williams. + +Build +----- + +- Issue #28248: Update Windows build to use OpenSSL 1.0.2j. + +Tests +----- + +- Issue #27369: In test_pyexpat, avoid testing an error message detail that + changed in Expat 2.2.0. + + +What's New in Python 3.4.5? +=========================== + +Release date: 2016-06-26 + +Tests +----- + +- Issue #26867: Ubuntu's openssl OP_NO_SSLv3 is forced on by default; fix test. + + +What's New in Python 3.4.5rc1? +============================== + +Release date: 2016-06-11 + +Core and Builtins +----------------- + +- 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(). + +Library +------- + +- Issue #26556: Update expat to 2.1.1, fixes CVE-2015-1283. + +- Fix TLS stripping vulnerability in smptlib, CVE-2016-0772. Reported by Team + Oststrom + +- Issue #25939: On Windows open the cert store readonly in ssl.enum_certificates. + +- 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. + +- Skip getaddrinfo if host is already resolved. + Patch by A. Jesse Jiryu Davis. + +- Add asyncio.timeout() context manager. + +- Issue #26050: Add asyncio.StreamReader.readuntil() method. + Patch by Марк Коренберг. + +Tests +----- + +- Issue #25940: Changed test_ssl to use self-signed.pythontest.net. This + avoids relying on svn.python.org, which recently changed root certificate. + + +What's New in Python 3.4.4? +=========================== + +Release date: 2015/12/20 + +Windows +------- + +- Issue #25844: Corrected =/== typo potentially leading to crash in launcher. + + +What's New in Python 3.4.4rc1? +============================== + +Release date: 2015/12/06 + +Core and Builtins +----------------- + +- Issue #25709: Fixed problem with in-place string concatenation and utf-8 + cache. + +- 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 #25388: Fixed tokenizer crash when processing undecodable source code + with a null byte. + +- 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 #24402: Fix input() to prompt to the redirected stdout when + sys.stdout.fileno() fails. + +- Issue #24806: Prevent builtin types that are not allowed to be subclassed from + being subclassed through multiple inheritance. + +- Issue #24848: Fixed a number of bugs in UTF-7 decoding of misformed data. + +- Issue #25280: Import trace messages emitted in verbose (-v) mode are no + longer formatted twice. + +- Issue #25003: os.urandom() doesn't use getentropy() on Solaris because + getentropy() is blocking, whereas os.urandom() should not block. getentropy() + is supported since Solaris 11.3. + +- Issue #25182: The stdprinter (used as sys.stderr before the io module is + imported at startup) now uses the backslashreplace error handler. + +- Issue #24891: Fix a race condition at Python startup if the file descriptor + of stdin (0), stdout (1) or stderr (2) is closed while Python is creating + sys.stdin, sys.stdout and sys.stderr objects. These attributes are now set + to None if the creation of the object failed, instead of raising an OSError + exception. Initial patch written by Marco Paolini. + +- Issue #21167: NAN operations are now handled correctly when python is + compiled with ICC even if -fp-model strict is not specified. + +- Issue #4395: Better testing and documentation of binary operators. + Patch by Martin Panter. + +- Issue #24467: Fixed possible buffer over-read in bytearray. The bytearray + object now always allocates place for trailing null byte and it's buffer now + is always null-terminated. + +- Issue #24115: Update uses of PyObject_IsTrue(), PyObject_Not(), + PyObject_IsInstance(), PyObject_RichCompareBool() and _PyDict_Contains() + to check for and handle errors correctly. + +- Issue #24257: Fixed system error in the comparison of faked + types.SimpleNamespace. + +- Issue #22939: Fixed integer overflow in iterator object. Patch by + Clement Rouault. + +- Issue #23985: Fix a possible buffer overrun when deleting a slice from + the front of a bytearray and then appending some other bytes data. + +- Issue #24102: Fixed exception type checking in standard error handlers. + +- Issue #23757: PySequence_Tuple() incorrectly called the concrete list API + when the data was a list subclass. + +- Issue #24407: Fix crash when dict is mutated while being updated. + +- Issue #24096: Make warnings.warn_explicit more robust against mutation of the + warnings.filters list. + +- Issue #23996: Avoid a crash when a delegated generator raises an + unnormalized StopIteration exception. Patch by Stefan Behnel. + +- Issue #24022: Fix tokenizer crash when processing undecodable source code. + +- Issue #23309: Avoid a deadlock at shutdown if a daemon thread is aborted + while it is holding a lock to a buffered I/O object, and the main thread + tries to use the same I/O object (typically stdout or stderr). A fatal + error is emitted instead. + +- Issue #22977: Fixed formatting Windows error messages on Wine. + Patch by Martin Panter. + +- Issue #23803: Fixed str.partition() and str.rpartition() when a separator + is wider then partitioned string. + +- Issue #23192: Fixed generator lambdas. Patch by Bruno Cauet. + +- Issue #23629: Fix the default __sizeof__ implementation for variable-sized + objects. + +- Issue #24044: Fix possible null pointer dereference in list.sort in out of + memory conditions. + +- Issue #21354: PyCFunction_New function is exposed by python DLL again. + +Library +------- + +- 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 #6478: _strptime's regexp cache now is reset after changing timezone + with time.tzset(). + +- 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 #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 #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 #25578: Fix (another) memory leak in SSLSocket.getpeercer(). + +- Issue #25590: In the Readline completer, only call getattr() once per + attribute. + +- Issue #25498: Fix a crash when garbage-collecting ctypes objects created + by wrapping a memoryview. This was a regression made in 3.4.3. Based + on patch by Eryksun. + +- Issue #18010: Fix the pydoc web server's module search function to handle + exceptions from importing packages. + +- 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 #25530: Disable the vulnerable SSLv3 protocol by default when creating + ssl.SSLContext. + +- Issue #25569: Fix memory leak in SSLSocket.getpeercert(). + +- 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 #25471: Sockets returned from accept() shouldn't appear to be + nonblocking. + +- Issue #25441: asyncio: Raise error from drain() when socket is closed. + +- Issue #25411: Improved Unicode support in SMTPHandler through better use of + the email package. Thanks to user simon04 for the patch. + +- 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 #25319: When threading.Event is reinitialized, the underlying condition + should use a regular lock rather than a recursive lock. + +- 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 #22958: Constructor and update method of weakref.WeakValueDictionary + now accept the self and the dict keyword arguments. + +- Issue #22609: Constructor of collections.UserDict now accepts the self keyword + argument. + +- Issue #25262. Added support for BINBYTES8 opcode in Python implementation of + unpickler. Highest 32 bits of 64-bit size for BINUNICODE8 and BINBYTES8 + opcodes no longer silently ignored on 32-bit platforms in C implementation. + +- Issue #25034: Fix string.Formatter problem with auto-numbering and + nested format_specs. Patch by Anthon van der Neut. + +- Issue #25233: Rewrite the guts of asyncio.Queue and + asyncio.Semaphore to be more understandable and correct. + +- 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. + +- Prevent overflow in _Unpickler_Read. + +- Issue #25047: The XML encoding declaration written by Element Tree now + respects the letter case given by the user. This restores the ability to + write encoding names in uppercase like "UTF-8", which worked in Python 2. + +- Issue #19143: platform module now reads Windows version from kernel32.dll to + avoid compatibility shims. + +- Issue #23517: Fix rounding in fromtimestamp() and utcfromtimestamp() methods + of datetime.datetime: microseconds are now rounded to nearest with ties + going to nearest even integer (ROUND_HALF_EVEN), instead of being rounding + towards zero (ROUND_DOWN). It's important that these methods use the same + rounding mode than datetime.timedelta to keep the property: + (datetime(1970,1,1) + timedelta(seconds=t)) == datetime.utcfromtimestamp(t). + It also the rounding mode used by round(float) for example. + +- Issue #24684: socket.socket.getaddrinfo() now calls + PyUnicode_AsEncodedString() instead of calling the encode() method of the + host, to handle correctly custom string with an encode() method which doesn't + return a byte string. The encoder of the IDNA codec is now called directly + instead of calling the encode() method of the string. + +- Issue #24982: shutil.make_archive() with the "zip" format now adds entries + for directories (including empty directories) in ZIP file. + +- Issue #24857: Comparing call_args to a long sequence now correctly returns a + boolean result instead of raising an exception. Patch by A Kaptur. + +- Issue #25019: Fixed a crash caused by setting non-string key of expat parser. + Based on patch by John Leitch. + +- Issue #24917: time_strftime() buffer over-read. + +- Issue #23144: Make sure that HTMLParser.feed() returns all the data, even + when convert_charrefs is True. + +- Issue #16180: Exit pdb if file has syntax error, instead of trapping user + in an infinite loop. Patch by Xavier de Gaye. + +- Issue #21112: Fix regression in unittest.expectedFailure on subclasses. + Patch from Berker Peksag. + +- Issue #24931: Instances of subclasses of namedtuples have their own __dict__ + which breaks the inherited __dict__ property and breaks the _asdict() method. + Removed the __dict__ property to prevent the conflict and fixed _asdict(). + +- Issue #24764: cgi.FieldStorage.read_multi() now ignores the Content-Length + header in part headers. Patch written by Peter Landry and reviewed by Pierre + Quentel. + +- Issue #24774: Fix docstring in http.server.test. Patch from Chiu-Hsiang Hsu. + +- Issue #21159: Improve message in configparser.InterpolationMissingOptionError. + Patch from Łukasz Langa. + +- Issue #23888: Handle fractional time in cookie expiry. Patch by ssh. + +- Issue #23004: mock_open() now reads binary data correctly when the type of + read_data is bytes. Initial patch by Aaron Hill. + +- Issue #23652: Make it possible to compile the select module against the + libc headers from the Linux Standard Base, which do not include some + EPOLL macros. Patch by Matt Frank. + +- Issue #22932: Fix timezones in email.utils.formatdate. + Patch from Dmitry Shachnev. + +- Issue #23779: imaplib raises TypeError if authenticator tries to abort. + Patch from Craig Holmquist. + +- Issue #23319: Fix ctypes.BigEndianStructure, swap correctly bytes. Patch + written by Matthieu Gautier. + +- Issue #23254: Document how to close the TCPServer listening socket. + Patch from Martin Panter. + +- Issue #19450: Update Windows and OS X installer builds to use SQLite 3.8.11. + +- Issue #23441: rcompleter now prints a tab character instead of displaying + possible completions for an empty word. Initial patch by Martin Sekera. + +- Issue #24735: Fix invalid memory access in + itertools.combinations_with_replacement(). + +- Issue #17527: Add PATCH to wsgiref.validator. Patch from Luca Sbardella. + +- Issue #24683: Fixed crashes in _json functions called with arguments of + inappropriate type. + +- Issue #21697: shutil.copytree() now correctly handles symbolic links that + point to directories. Patch by Eduardo Seabra and Thomas Kluyver. + +- Issue #24620: Random.setstate() now validates the value of state last element. + +- Issue #22153: Improve unittest docs. Patch from Martin Panter and evilzero. + +- Issue #24206: Fixed __eq__ and __ne__ methods of inspect classes. + +- Issue #21750: mock_open.read_data can now be read from each instance, as it + could in Python 3.3. + +- Issue #23247: Fix a crash in the StreamWriter.reset() of CJK codecs. + +- Issue #18622: unittest.mock.mock_open().reset_mock would recurse infinitely. + Patch from Nicola Palumbo and Laurent De Buyst. + +- Issue #24608: chunk.Chunk.read() now always returns bytes, not str. + +- Issue #18684: Fixed reading out of the buffer in the re module. + +- Issue #24259: tarfile now raises a ReadError if an archive is truncated + inside a data segment. + +- Issue #24552: Fix use after free in an error case of the _pickle module. + +- Issue #24514: tarfile now tolerates number fields consisting of only + whitespace. + +- Issue #19176: Fixed doctype() related bugs in C implementation of ElementTree. + A deprecation warning no longer issued by XMLParser subclass with default + doctype() method. Direct call of doctype() now issues a warning. Parser's + doctype() now is not called if target's doctype() is called. Based on patch + by Martin Panter. + +- Issue #20387: Restore semantic round-trip correctness in tokenize/untokenize + for tab-indented blocks. + +- Issue #24456: Fixed possible buffer over-read in adpcm2lin() and lin2adpcm() + functions of the audioop module. + +- Issue #24336: The contextmanager decorator now works with functions with + keyword arguments called "func" and "self". Patch by Martin Panter. + +- Issue #24489: ensure a previously set C errno doesn't disturb cmath.polar(). + +- Issue #5633: Fixed timeit when the statement is a string and the setup is not. + +- Issue #24326: Fixed audioop.ratecv() with non-default weightB argument. + Original patch by David Moore. + +- Issue #23840: tokenize.open() now closes the temporary binary file on error + to fix a resource warning. + +- Issue #24257: Fixed segmentation fault in sqlite3.Row constructor with faked + cursor type. + +- Issue #22107: tempfile.gettempdir() and tempfile.mkdtemp() now try again + when a directory with the chosen name already exists on Windows as well as + on Unix. tempfile.mkstemp() now fails early if parent directory is not + valid (not exists or is a file) on Windows. + +- Issue #6598: Increased time precision and random number range in + email.utils.make_msgid() to strengthen the uniqueness of the message ID. + +- Issue #24091: Fixed various crashes in corner cases in C implementation of + ElementTree. + +- Issue #21931: msilib.FCICreate() now raises TypeError in the case of a bad + argument instead of a ValueError with a bogus FCI error number. + Patch by Jeffrey Armstrong. + +- Issue #23796: peek and read1 methods of BufferedReader now raise ValueError + if they called on a closed object. Patch by John Hergenroeder. + +- Issue #24521: Fix possible integer overflows in the pickle module. + +- Issue #22931: Allow '[' and ']' in cookie values. + +- Issue #20274: Remove ignored and erroneous "kwargs" parameters from three + METH_VARARGS methods on _sqlite.Connection. + +- Issue #24094: Fix possible crash in json.encode with poorly behaved dict + subclasses. + +- Asyncio issue 222 / PR 231 (Victor Stinner) -- fix @coroutine + functions without __name__. + +- Issue #9246: On POSIX, os.getcwd() now supports paths longer than 1025 bytes. + Patch written by William Orr. + +- The keywords attribute of functools.partial is now always a dictionary. + +- Issues #24099, #24100, and #24101: Fix free-after-use bug in heapq's siftup + and siftdown functions. + +- Backport collections.deque fixes from Python 3.5. Prevents reentrant badness + during deletion by deferring the decref until the container has been restored + to a consistent state. + +- Issue #23008: Fixed resolving attributes with boolean value is False in pydoc. + +- Fix asyncio issue 235: LifoQueue and PriorityQueue's put didn't + increment unfinished tasks (this bug was introduced in 3.4.3 when + JoinableQueue was merged with Queue). + +- Issue #23908: os functions now reject paths with embedded null character + on Windows instead of silently truncate them. + +- Issue #23728: binascii.crc_hqx() could return an integer outside of the range + 0-0xffff for empty data. + +- Issue #23811: Add missing newline to the PyCompileError error message. + Patch by Alex Shkop. + +- Issue #17898: Fix exception in gettext.py when parsing certain plural forms. + +- Issue #22982: Improve BOM handling when seeking to multiple positions of + a writable text file. + +- Issue #23865: close() methods in multiple modules now are idempotent and more + robust at shutdown. If they need to release multiple resources, all are + released even if errors occur. + +- Issue #23881: urllib.request.ftpwrapper constructor now closes the socket if + the FTP connection failed to fix a ResourceWarning. + +- Issue #23400: Raise same exception on both Python 2 and 3 if sem_open is not + available. Patch by Davin Potts. + +- Issue #15133: _tkinter.tkapp.getboolean() now supports Tcl_Obj and always + returns bool. tkinter.BooleanVar now validates input values (accepted bool, + int, str, and Tcl_Obj). tkinter.BooleanVar.get() now always returns bool. + +- Issue #23338: Fixed formatting ctypes error messages on Cygwin. + Patch by Makoto Kato. + +- Issue #16840: Tkinter now supports 64-bit integers added in Tcl 8.4 and + arbitrary precision integers added in Tcl 8.5. + +- Issue #23834: Fix socket.sendto(), use the C Py_ssize_t type to store the + result of sendto() instead of the C int type. + +- Issue #21526: Tkinter now supports new boolean type in Tcl 8.5. + +- Issue #23838: linecache now clears the cache and returns an empty result on + MemoryError. + +- Issue #18473: Fixed 2to3 and 3to2 compatible pickle mappings. Fixed + ambigious reverse mappings. Added many new mappings. Import mapping is no + longer applied to modules already mapped with full name mapping. + +- Issue #23745: The new email header parser now handles duplicate MIME + parameter names without error, similar to how get_param behaves. + +- Issue #23792: Ignore KeyboardInterrupt when the pydoc pager is active. + This mimics the behavior of the standard unix pagers, and prevents + pipepager from shutting down while the pager itself is still running. + +- Issue #23742: ntpath.expandvars() no longer loses unbalanced single quotes. + +- Issue #21802: The reader in BufferedRWPair now is closed even when closing + writer failed in BufferedRWPair.close(). + +- Issue #23671: string.Template now allows to specify the "self" parameter as + keyword argument. string.Formatter now allows to specify the "self" and + the "format_string" parameters as keyword arguments. + +- Issue #21560: An attempt to write a data of wrong type no longer cause + GzipFile corruption. Original patch by Wolfgang Maier. + +- Issue #23647: Increase impalib's MAXLINE to accommodate modern mailbox sizes. + +- Issue #23539: If body is None, http.client.HTTPConnection.request now sets + Content-Length to 0 for PUT, POST, and PATCH headers to avoid 411 errors from + some web servers. + +- Issue #22351: The nntplib.NNTP constructor no longer leaves the connection + and socket open until the garbage collector cleans them up. Patch by + Martin Panter. + +- Issue #23136: _strptime now uniformly handles all days in week 0, including + Dec 30 of previous year. Based on patch by Jim Carroll. + +- Issue #23700: Iterator of NamedTemporaryFile now keeps a reference to + NamedTemporaryFile instance. Patch by Bohuslav Kabrda. + +- Issue #22903: The fake test case created by unittest.loader when it fails + importing a test module is now picklable. + +- Issue #23568: Add rdivmod support to MagicMock() objects. + Patch by Håkan Lövdahl. + +- Issue #23138: Fixed parsing cookies with absent keys or values in cookiejar. + Patch by Demian Brecht. + +- Issue #23051: multiprocessing.Pool methods imap() and imap_unordered() now + handle exceptions raised by an iterator. Patch by Alon Diamant and Davin + Potts. + +- Issue #22928: Disabled HTTP header injections in http.client. + Original patch by Demian Brecht. + +- Issue #23615: Modules bz2, tarfile and tokenize now can be reloaded with + imp.reload(). Patch by Thomas Kluyver. + +- Issue #23476: In the ssl module, enable OpenSSL's X509_V_FLAG_TRUSTED_FIRST + flag on certificate stores when it is available. + +- Issue #23576: Avoid stalling in SSL reads when EOF has been reached in the + SSL layer but the underlying connection hasn't been closed. + +- Issue #23504: Added an __all__ to the types module. + +- Issue #20204: Added the __module__ attribute to _tkinter classes. + +- Issue #23521: Corrected pure python implementation of timedelta division. + + * Eliminated OverflowError from timedelta * float for some floats; + * Corrected rounding in timedlta true division. + +- Issue #21619: Popen objects no longer leave a zombie after exit in the with + statement if the pipe was broken. Patch by Martin Panter. + +- Issue #6639: Module-level turtle functions no longer raise TclError after + closing the window. + +- Issues #814253, #9179: Warnings now are raised when group references and + conditional group references are used in lookbehind assertions in regular + expressions. + +- Issue #23215: Multibyte codecs with custom error handlers that ignores errors + consumed too much memory and raised SystemError or MemoryError. + Original patch by Aleksi Torhamo. + +- Issue #5700: io.FileIO() called flush() after closing the file. + flush() was not called in close() if closefd=False. + +- Issue #23374: Fixed pydoc failure with non-ASCII files when stdout encoding + differs from file system encoding (e.g. on Mac OS). + +- Issue #23481: Remove RC4 from the SSL module's default cipher list. + +- Issue #21548: Fix pydoc.synopsis() and pydoc.apropos() on modules with empty + docstrings. + +- Issue #22885: Fixed arbitrary code execution vulnerability in the dbm.dumb + module. Original patch by Claudiu Popa. + +- Issue #23146: Fix mishandling of absolute Windows paths with forward + slashes in pathlib. + +- Issue #23421: Fixed compression in tarfile CLI. Patch by wdv4758h. + +- Issue #23367: Fix possible overflows in the unicodedata module. + +- Issue #23361: Fix possible overflow in Windows subprocess creation code. + +- Issue #23801: Fix issue where cgi.FieldStorage did not always ignore the + entire preamble to a multipart body. + +- Issue #23310: Fix MagicMock's initializer to work with __methods__, just + like configure_mock(). Patch by Kasia Jachim. + +- asyncio: New event loop APIs: set_task_factory() and get_task_factory(). + +- asyncio: async() function is deprecated in favour of ensure_future(). + +- Issue #23898: Fix inspect.classify_class_attrs() to support attributes + with overloaded __eq__ and __bool__. Patch by Mike Bayer. + +- Issue #24298: Fix inspect.signature() to correctly unwrap wrappers + around bound methods. + +- Issue #23572: Fixed functools.singledispatch on classes with falsy + metaclasses. Patch by Ethan Furman. + +IDLE +---- + +- 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 Mark 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). + +- Issue #23672: Allow Idle to edit and run files with astral chars in name. + Patch by Mohd Sanad Zaki Rizvi. + +- Issue 24745: Idle editor default font. Switch from Courier to + platform-sensitive TkFixedFont. This should not affect current customized + font selections. If there is a problem, edit $HOME/.idlerc/config-main.cfg + and remove 'fontxxx' entries from [Editor Window]. Patch by Mark Roseman. + +- Issue #21192: Idle editor. When a file is run, put its name in the restart bar. + Do not print false prompts. Original patch by Adnan Umer. + +- Issue #13884: Idle menus. Remove tearoff lines. Patch by Roger Serwy. + +- Issue #23184: remove unused names and imports in idlelib. + Initial patch by Al Sweigart. + +Tests +----- + +- Issue #25616: Tests for OrderedDict are extracted from test_collections + into separate file test_ordered_dict. + +- Issue #25099: Make test_compileall not fail when an entry on sys.path cannot + be written to (commonly seen in administrative installs on Windows). + +- Issue #24751: When running regrtest with the ``-w`` command line option, + a test run is no longer marked as a failure if all tests succeed when + re-run. + +- Issue #21520: test_zipfile no longer fails if the word 'bad' appears + anywhere in the name of the current directory. + +- Issue #23799: Added test.support.start_threads() for running and + cleaning up multiple threads. + +- Issue #22390: test.regrtest now emits a warning if temporary files or + directories are left after running a test. + +- Issue #23583: Added tests for standard IO streams in IDLE. + +Build +----- + +- Issue #23445: pydebug builds now use "gcc -Og" where possible, to make + the resulting executable faster. + +- Issue #24603: Update Windows builds to use OpenSSL1.0.2d + and OS X 10.5 installer to use OpenSSL 1.0.2e. + +C API +----- + +- Issue #23998: PyImport_ReInitLock() now checks for lock allocation error + +Documentation +------------- + +- Issue #12067: Rewrite Comparisons section in the Expressions chapter of the + language reference. Some of the details of comparing mixed types were + incorrect or ambiguous. NotImplemented is only relevant at a lower level + than the Expressions chapter. Added details of comparing range() objects, + and default behaviour and consistency suggestions for user-defined classes. + Patch from Andy Maier. + +- Issue #24952: Clarify the default size argument of stack_size() in + the "threading" and "_thread" modules. Patch from Mattip. + +- Issue #24808: Update the types of some PyTypeObject fields. Patch by + Joseph Weston. + +- Issue #22812: Fix unittest discovery examples. + Patch from Pam McA'Nulty. + +- Issue #24129: Clarify the reference documentation for name resolution. + This includes removing the assumption that readers will be familiar with the + name resolution scheme Python used prior to the introduction of lexical + scoping for function namespaces. Patch by Ivan Levkivskyi. + +- Issue #20769: Improve reload() docs. Patch by Dorian Pula. + +- Issue #23589: Remove duplicate sentence from the FAQ. Patch by Yongzhi Pan. + +- Issue #24729: Correct IO tutorial to match implementation regarding + encoding parameter to open function. + +- Issue #24351: Clarify what is meant by "identifier" in the context of + string.Template instances. + +- Issue #22155: Add File Handlers subsection with createfilehandler to tkinter + doc. Remove obsolete example from FAQ. Patch by Martin Panter. + +- Issue #24029: Document the name binding behavior for submodule imports. + +- Issue #24077: Fix typo in man page for -I command option: -s, not -S. + +Tools/Demos +----------- + +- Issue #25440: Fix output of python-config --extension-suffix. + +- Issue #23330: h2py now supports arbitrary filenames in #include. + +- Issue #24031: make patchcheck now supports git checkouts, too. + +Windows +------- + +- Issue #24306: Sets component ID for launcher to match 3.5 and later + to avoid downgrading. + +- Issue #25022: Removed very outdated PC/example_nt/ directory. + + +What's New in Python 3.4.3? +=========================== + +Release date: 2015-02-23 + +Core and Builtins +----------------- + +- Issue #22735: Fix many edge cases (including crashes) involving custom mro() + implementations. + +- Issue #22896: Avoid using PyObject_AsCharBuffer(), PyObject_AsReadBuffer() + and PyObject_AsWriteBuffer(). + +- Issue #21295: Revert some changes (issue #16795) to AST line numbers and + column offsets that constituted a regression. + +- Issue #21408: The default __ne__() now returns NotImplemented if __eq__() + returned NotImplemented. Original patch by Martin Panter. + +- Issue #23321: Fixed a crash in str.decode() when error handler returned + replacment string longer than mailformed input data. + +- Issue #23048: Fix jumping out of an infinite while loop in the pdb. + +- Issue #20335: bytes constructor now raises TypeError when encoding or errors + is specified with non-string argument. Based on patch by Renaud Blanch. + +- Issue #22335: Fix crash when trying to enlarge a bytearray to 0x7fffffff + bytes on a 32-bit platform. + +- Issue #22653: Fix an assertion failure in debug mode when doing a reentrant + dict insertion in debug mode. + +- Issue #22643: Fix integer overflow in Unicode case operations (upper, lower, + title, swapcase, casefold). + +- Issue #22604: Fix assertion error in debug mode when dividing a complex + number by (nan+0j). + +- Issue #22470: Fixed integer overflow issues in "backslashreplace", + "xmlcharrefreplace", and "surrogatepass" error handlers. + +- Issue #22520: Fix overflow checking when generating the repr of a unicode + object. + +- Issue #22519: Fix overflow checking in PyBytes_Repr. + +- Issue #22518: Fix integer overflow issues in latin-1 encoding. + +- Issue #23165: Perform overflow checks before allocating memory in the + _Py_char2wchar function. + +Library +------- + +- Issue #23399: pyvenv creates relative symlinks where possible. + +- Issue #23099: Closing io.BytesIO with exported buffer is rejected now to + prevent corrupting exported buffer. + +- Issue #23363: Fix possible overflow in itertools.permutations. + +- Issue #23364: Fix possible overflow in itertools.product. + +- Issue #23366: Fixed possible integer overflow in itertools.combinations. + +- Issue #23369: Fixed possible integer overflow in + _json.encode_basestring_ascii. + +- Issue #23353: Fix the exception handling of generators in + PyEval_EvalFrameEx(). At entry, save or swap the exception state even if + PyEval_EvalFrameEx() is called with throwflag=0. At exit, the exception state + is now always restored or swapped, not only if why is WHY_YIELD or + WHY_RETURN. Patch co-written with Antoine Pitrou. + +- Issue #18518: timeit now rejects statements which can't be compiled outside + a function or a loop (e.g. "return" or "break"). + +- Issue #23094: Fixed readline with frames in Python implementation of pickle. + +- Issue #23268: Fixed bugs in the comparison of ipaddress classes. + +- Issue #21408: Removed incorrect implementations of __ne__() which didn't + returned NotImplemented if __eq__() returned NotImplemented. The default + __ne__() now works correctly. + +- Issue #19996: :class:`email.feedparser.FeedParser` now handles (malformed) + headers with no key rather than assuming the body has started. + +- Issue #23248: Update ssl error codes from latest OpenSSL git master. + +- Issue #23098: 64-bit dev_t is now supported in the os module. + +- Issue #23250: In the http.cookies module, capitalize "HttpOnly" and "Secure" + as they are written in the standard. + +- Issue #23063: In the disutils' check command, fix parsing of reST with code or + code-block directives. + +- Issue #23209, #23225: selectors.BaseSelector.close() now clears its internal + reference to the selector mapping to break a reference cycle. Initial patch + written by Martin Richard. + +- Issue #21356: Make ssl.RAND_egd() optional to support LibreSSL. The + availability of the function is checked during the compilation. Patch written + by Bernard Spil. + +- Issue #20896, #22935: The :func:`ssl.get_server_certificate` function now + uses the :data:`~ssl.PROTOCOL_SSLv23` protocol by default, not + :data:`~ssl.PROTOCOL_SSLv3`, for maximum compatibility and support platforms + where :data:`~ssl.PROTOCOL_SSLv3` support is disabled. + +- Issue #23111: In the ftplib, make ssl.PROTOCOL_SSLv23 the default protocol + version. + +- Issue #23132: Mitigate regression in speed and clarity in functools.total_ordering. + +- Issue #22585: On OpenBSD 5.6 and newer, os.urandom() now calls getentropy(), + instead of reading /dev/urandom, to get pseudo-random bytes. + +- Issue #23112: Fix SimpleHTTPServer to correctly carry the query string and + fragment when it redirects to add a trailing slash. + +- Issue #23093: In the io, module allow more operations to work on detached + streams. + +- Issue #19104: pprint now produces evaluable output for wrapped strings. + +- Issue #23071: Added missing names to codecs.__all__. Patch by Martin Panter. + +- Issue #15513: Added a __sizeof__ implementation for pickle classes. + +- Issue #19858: pickletools.optimize() now aware of the MEMOIZE opcode, can + produce more compact result and no longer produces invalid output if input + data contains MEMOIZE opcodes together with PUT or BINPUT opcodes. + +- Issue #22095: Fixed HTTPConnection.set_tunnel with default port. The port + value in the host header was set to "None". Patch by Demian Brecht. + +- Issue #23016: A warning no longer produces an AttributeError when the program + is run with pythonw.exe. + +- Issue #21775: shutil.copytree(): fix crash when copying to VFAT. An exception + handler assumed that that OSError objects always have a 'winerror' attribute. + That is not the case, so the exception handler itself raised AttributeError + when run on Linux (and, presumably, any other non-Windows OS). + Patch by Greg Ward. + +- Issue #1218234: Fix inspect.getsource() to load updated source of + reloaded module. Initial patch by Berker Peksag. + +- Issue #22959: In the constructor of http.client.HTTPSConnection, prefer the + context's check_hostname attribute over the *check_hostname* parameter. + +- Issue #16043: Add a default limit for the amount of data xmlrpclib.gzip_decode + will return. This resolves CVE-2013-1753. + +- Issue #22966: Fix __pycache__ pyc file name clobber when pyc_compile is + asked to compile a source file containing multiple dots in the source file + name. + +- Issue #21971: Update turtledemo doc and add module to the index. + +- Issue #21032. Fixed socket leak if HTTPConnection.getresponse() fails. + Original patch by Martin Panter. + +- Issue #22960: Add a context argument to xmlrpclib.ServerProxy constructor. + +- Issue #22915: SAX parser now supports files opened with file descriptor or + bytes path. + +- Issue #22609: Constructors and update methods of mapping classes in the + collections module now accept the self keyword argument. + +- Issue #22788: Add *context* parameter to logging.handlers.HTTPHandler. + +- Issue #22921: Allow SSLContext to take the *hostname* parameter even if + OpenSSL doesn't support SNI. + +- Issue #22894: TestCase.subTest() would cause the test suite to be stopped + when in failfast mode, even in the absence of failures. + +- Issue #22638: SSLv3 is now disabled throughout the standard library. + It can still be enabled by instantiating a SSLContext manually. + +- Issue #22370: Windows detection in pathlib is now more robust. + +- Issue #22841: Reject coroutines in asyncio add_signal_handler(). + Patch by Ludovic.Gasc. + +- Issue #22849: Fix possible double free in the io.TextIOWrapper constructor. + +- Issue #12728: Different Unicode characters having the same uppercase but + different lowercase are now matched in case-insensitive regular expressions. + +- Issue #22821: Fixed fcntl() with integer argument on 64-bit big-endian + platforms. + +- Issue #22406: Fixed the uu_codec codec incorrectly ported to 3.x. + Based on patch by Martin Panter. + +- Issue #17293: uuid.getnode() now determines MAC address on AIX using netstat. + Based on patch by Aivars Kalvāns. + +- Issue #22769: Fixed ttk.Treeview.tag_has() when called without arguments. + +- Issue #22417: Verify certificates by default in httplib (PEP 476). + +- Issue #22775: Fixed unpickling of http.cookies.SimpleCookie with protocol 2 + and above. Patch by Tim Graham. + +- Issue #22366: urllib.request.urlopen will accept a context object + (SSLContext) as an argument which will then used be for HTTPS connection. + Patch by Alex Gaynor. + +- Issue #22776: Brought excluded code into the scope of a try block in + SysLogHandler.emit(). + +- Issue #22665: Add missing get_terminal_size and SameFileError to + shutil.__all__. + +- Issue #17381: Fixed handling of case-insensitive ranges in regular + expressions. + +- Issue #22410: Module level functions in the re module now cache compiled + locale-dependent regular expressions taking into account the locale. + +- Issue #22759: Query methods on pathlib.Path() (exists(), is_dir(), etc.) + now return False when the underlying stat call raises NotADirectoryError. + +- Issue #8876: distutils now falls back to copying files when hard linking + doesn't work. This allows use with special filesystems such as VirtualBox + shared folders. + +- Issue #18853: Fixed ResourceWarning in shlex.__nain__. + +- Issue #9351: Defaults set with set_defaults on an argparse subparser + are no longer ignored when also set on the parent parser. + +- Issue #21991: Make email.headerregistry's header 'params' attributes + be read-only (MappingProxyType). Previously the dictionary was modifiable + but a new one was created on each access of the attribute. + +- Issue #22641: In asyncio, the default SSL context for client connections + is now created using ssl.create_default_context(), for stronger security. + +- Issue #22435: Fix a file descriptor leak when SocketServer bind fails. + +- Issue #13096: Fixed segfault in CTypes POINTER handling of large + values. + +- Issue #11694: Raise ConversionError in xdrlib as documented. Patch + by Filip Gruszczyński and Claudiu Popa. + +- Issue #22462: Fix pyexpat's creation of a dummy frame to make it + appear in exception tracebacks. + +- Issue #21173: Fix len() on a WeakKeyDictionary when .clear() was called + with an iterator alive. + +- Issue #11866: Eliminated race condition in the computation of names + for new threads. + +- Issue #21905: Avoid RuntimeError in pickle.whichmodule() when sys.modules + is mutated while iterating. Patch by Olivier Grisel. + +- Issue #22219: The zipfile module CLI now adds entries for directories + (including empty directories) in ZIP file. + +- Issue #22449: In the ssl.SSLContext.load_default_certs, consult the + environmental variables SSL_CERT_DIR and SSL_CERT_FILE on Windows. + +- Issue #20076: Added non derived UTF-8 aliases to locale aliases table. + +- Issue #20079: Added locales supported in glibc 2.18 to locale alias table. + +- Issue #22396: On 32-bit AIX platform, don't expose os.posix_fadvise() nor + os.posix_fallocate() because their prototypes in system headers are wrong. + +- Issue #22517: When a io.BufferedRWPair object is deallocated, clear its + weakrefs. + +- Issue #22448: Improve canceled timer handles cleanup to prevent + unbound memory usage. Patch by Joshua Moore-Oliva. + +- Issue #23009: Make sure selectors.EpollSelecrtor.select() works when no + FD is registered. + +IDLE +---- + +- Issue #20577: Configuration of the max line length for the FormatParagraph + extension has been moved from the General tab of the Idle preferences dialog + to the FormatParagraph tab of the Config Extensions dialog. + Patch by Tal Einat. + +- Issue #16893: Update Idle doc chapter to match current Idle and add new + information. + +- Issue #3068: Add Idle extension configuration dialog to Options menu. + Changes are written to HOME/.idlerc/config-extensions.cfg. + Original patch by Tal Einat. + +- Issue #16233: A module browser (File : Class Browser, Alt+C) requires an + editor window with a filename. When Class Browser is requested otherwise, + from a shell, output window, or 'Untitled' editor, Idle no longer displays + an error box. It now pops up an Open Module box (Alt+M). If a valid name + is entered and a module is opened, a corresponding browser is also opened. + +- Issue #4832: Save As to type Python files automatically adds .py to the + name you enter (even if your system does not display it). Some systems + automatically add .txt when type is Text files. + +- Issue #21986: Code objects are not normally pickled by the pickle module. + To match this, they are no longer pickled when running under Idle. + +- Issue #23180: Rename IDLE "Windows" menu item to "Window". + Patch by Al Sweigart. + +Tests +----- + +- Issue #23392: Added tests for marshal C API that works with FILE*. + +- Issue #18982: Add tests for CLI of the calendar module. + +- Issue #19548: Added some additional checks to test_codecs to ensure that + statements in the updated documentation remain accurate. Patch by Martin + Panter. + +- Issue #22838: All test_re tests now work with unittest test discovery. + +- Issue #22173: Update lib2to3 tests to use unittest test discovery. + +- Issue #16000: Convert test_curses to use unittest. + +- Issue #21456: Skip two tests in test_urllib2net.py if _ssl module not + present. Patch by Remi Pointel. + +- Issue #22770: Prevent some Tk segfaults on OS X when running gui tests. + +- Issue #23211: Workaround test_logging failure on some OS X 10.6 systems. + +- Issue #23345: Prevent test_ssl failures with large OpenSSL patch level + values (like 0.9.8zc). + +- Issue #22289: Prevent test_urllib2net failures due to ftp connection timeout. + +Build +----- + +- Issue #15506: Use standard PKG_PROG_PKG_CONFIG autoconf macro in the configure + script. + +- Issue #22935: Allow the ssl module to be compiled if openssl doesn't support + SSL 3. + +- Issue #16537: Check whether self.extensions is empty in setup.py. Patch by + Jonathan Hosmer. + +- Issue #18096: Fix library order returned by python-config. + +- Issue #17219: Add library build dir for Python extension cross-builds. + +- Issue #17128: Use private version of OpenSSL for 3.4.3 OS X 10.5+ installer. + +C API +----- + +- Issue #22079: PyType_Ready() now checks that statically allocated type has + no dynamically allocated bases. + +Documentation +------------- + +- Issue #19548: Update the codecs module documentation to better cover the + distinction between text encodings and other codecs, together with other + clarifications. Patch by Martin Panter. + +- Issue #22914: Update the Python 2/3 porting HOWTO to describe a more automated + approach. + +- Issue #21514: The documentation of the json module now refers to new JSON RFC + 7159 instead of obsoleted RFC 4627. + +Tools/Demos +----------- + +- Issue #22314: pydoc now works when the LINES environment variable is set. + +Windows +------- + +- Issue #17896: The Windows build scripts now expect external library sources + to be in ``PCbuild\..\externals`` rather than ``PCbuild\..\..``. + +- Issue #17717: The Windows build scripts now use a copy of NASM pulled from + svn.python.org to build OpenSSL. + +- Issue #22644: The bundled version of OpenSSL has been updated to 1.0.1j. + + +What's New in Python 3.4.2? +=========================== + +Release date: 2014-10-06 + +Library +------- + +- Issue #10510: distutils register and upload methods now use HTML standards + compliant CRLF line endings. + +- Issue #9850: Fixed macpath.join() for empty first component. Patch by + Oleg Oshmyan. + +- Issue #22427: TemporaryDirectory no longer attempts to clean up twice when + used in the with statement in generator. + +- Issue #20912: Now directories added to ZIP file have correct Unix and MS-DOS + directory attributes. + +- Issue #21866: ZipFile.close() no longer writes ZIP64 central directory + records if allowZip64 is false. + +- Issue #22415: Fixed debugging output of the GROUPREF_EXISTS opcode in the re + module. Removed trailing spaces in debugging output. + +- Issue #22423: Unhandled exception in thread no longer causes unhandled + AttributeError when sys.stderr is None. + +- Issue #21332: Ensure that ``bufsize=1`` in subprocess.Popen() selects + line buffering, rather than block buffering. Patch by Akira Li. + + +What's New in Python 3.4.2rc1? +============================== + +Release date: 2014-09-22 + +Core and Builtins +----------------- + +- Issue #22258: Fix the the internal function set_inheritable() on Illumos. + This platform exposes the function ``ioctl(FIOCLEX)``, but calling it fails + with errno is ENOTTY: "Inappropriate ioctl for device". set_inheritable() + now falls back to the slower ``fcntl()`` (``F_GETFD`` and then ``F_SETFD``). + +- Issue #21669: With the aid of heuristics in SyntaxError.__init__, the + parser now attempts to generate more meaningful (or at least more search + engine friendly) error messages when "exec" and "print" are used as + statements. + +- Issue #21642: In the conditional if-else expression, allow an integer written + with no space between itself and the ``else`` keyword (e.g. ``True if 42else + False``) to be valid syntax. + +- Issue #21523: Fix over-pessimistic computation of the stack effect of + some opcodes in the compiler. This also fixes a quadratic compilation + time issue noticeable when compiling code with a large number of "and" + and "or" operators. + +Library +------- + +- Issue #21091: Fix API bug: email.message.EmailMessage.is_attachment is now + a method. Since EmailMessage is provisional, we can change the API in a + maintenance release, but we use a trick to remain backward compatible with + 3.4.0/1. + +- Issue #21079: Fix email.message.EmailMessage.is_attachment to return the + correct result when the header has parameters as well as a value. + +- Issue #22247: Add NNTPError to nntplib.__all__. + +- Issue #4180: The warnings registries are now reset when the filters + are modified. + +- Issue #22419: Limit the length of incoming HTTP request in wsgiref server to + 65536 bytes and send a 414 error code for higher lengths. Patch contributed + by Devin Cook. + +- Lax cookie parsing in http.cookies could be a security issue when combined + with non-standard cookie handling in some Web browsers. Reported by + Sergey Bobrov. + +- Issue #22384: An exception in Tkinter callback no longer crashes the program + when it is run with pythonw.exe. + +- Issue #22168: Prevent turtle AttributeError with non-default Canvas on OS X. + +- Issue #21147: sqlite3 now raises an exception if the request contains a null + character instead of truncate it. Based on patch by Victor Stinner. + +- Issue #21951: Fixed a crash in Tkinter on AIX when called Tcl command with + empty string or tuple argument. + +- Issue #21951: Tkinter now most likely raises MemoryError instead of crash + if the memory allocation fails. + +- Issue #22338: Fix a crash in the json module on memory allocation failure. + +- Issue #22226: First letter no longer is stripped from the "status" key in + the result of Treeview.heading(). + +- Issue #19524: Fixed resource leak in the HTTP connection when an invalid + response is received. Patch by Martin Panter. + +- Issue #22051: turtledemo no longer reloads examples to re-run them. + Initialization of variables and gui setup should be done in main(), + which is called each time a demo is run, but not on import. + +- Issue #21933: Turtledemo users can change the code font size with a menu + selection or control(command) '-' or '+' or control-mousewheel. + Original patch by Lita Cho. + +- Issue #21597: The separator between the turtledemo text pane and the drawing + canvas can now be grabbed and dragged with a mouse. The code text pane can + be widened to easily view or copy the full width of the text. The canvas + can be widened on small screens. Original patches by Jan Kanis and Lita Cho. + +- Issue #18132: Turtledemo buttons no longer disappear when the window is + shrunk. Original patches by Jan Kanis and Lita Cho. + +- Issue #22216: smtplib now resets its state more completely after a quit. The + most obvious consequence of the previous behavior was a STARTTLS failure + during a connect/starttls/quit/connect/starttls sequence. + +- Issue #22185: Fix an occasional RuntimeError in threading.Condition.wait() + caused by mutation of the waiters queue without holding the lock. Patch + by Doug Zongker. + +- Issue #22182: Use e.args to unpack exceptions correctly in + distutils.file_util.move_file. Patch by Claudiu Popa. + +- The webbrowser module now uses subprocess's start_new_session=True rather + than a potentially risky preexec_fn=os.setsid call. + +- Issue #22236: Fixed Tkinter images copying operations in NoDefaultRoot mode. + +- Issue #22191: Fix warnings.__all__. + +- Issue #15696: Add a __sizeof__ implementation for mmap objects on Windows. + +- Issue #22068: Avoided reference loops with Variables and Fonts in Tkinter. + +- Issue #22165: SimpleHTTPRequestHandler now supports undecodable file names. + +- Issue #8797: Raise HTTPError on failed Basic Authentication immediately. + Initial patch by Sam Bull. + +- Issue #20729: Restored the use of lazy iterkeys()/itervalues()/iteritems() + in the mailbox module. + +- Issue #21448: Changed FeedParser feed() to avoid O(N**2) behavior when + parsing long line. Original patch by Raymond Hettinger. + +- Issue #22184: The functools LRU Cache decorator factory now gives an earlier + and clearer error message when the user forgets the required parameters. + +- Issue #17923: glob() patterns ending with a slash no longer match non-dirs on + AIX. Based on patch by Delhallt. + +- Issue #21121: Don't force 3rd party C extensions to be built with + -Werror=declaration-after-statement. + +- Issue #21975: Fixed crash when using uninitialized sqlite3.Row (in particular + when unpickling pickled sqlite3.Row). sqlite3.Row is now initialized in the + __new__() method. + +- Issue #21580: Now Tkinter correctly handles bytes arguments passed to Tk. + In particular this allows to initialize images from binary data. + +- Issue #17172: Make turtledemo start as active on OS X even when run with + subprocess. Patch by Lita Cho. + +- Issue #21704: Fix build error for _multiprocessing when semaphores + are not available. Patch by Arfrever Frehtes Taifersar Arahesis. + +- Fix repr(_socket.socket) on Windows 64-bit: don't fail with OverflowError + on closed socket. repr(socket.socket) already works fine. + +- Issue #16133: The asynchat.async_chat.handle_read() method now ignores + BlockingIOError exceptions. + +- Issue #22044: Fixed premature DECREF in call_tzinfo_method. + Patch by Tom Flanagan. + +- Issue #19884: readline: Disable the meta modifier key if stdout is not + a terminal to not write the ANSI sequence "\033[1034h" into stdout. This + sequence is used on some terminal (ex: TERM=xterm-256color") to enable + support of 8 bit characters. + +- Issue #21888: plistlib's load() and loads() now work if the fmt parameter is + specified. + +- Issue #21044: tarfile.open() now handles fileobj with an integer 'name' + attribute. Based on patch by Antoine Pietri. + +- Issue #21867: Prevent turtle crash due to invalid undo buffer size. + +- Issue #19076: Don't pass the redundant 'file' argument to self.error(). + +- Issue #21942: Fixed source file viewing in pydoc's server mode on Windows. + +- Issue #11259: asynchat.async_chat().set_terminator() now raises a ValueError + if the number of received bytes is negative. + +- Issue #12523: asynchat.async_chat.push() now raises a TypeError if it doesn't + get a bytes string + +- Issue #21707: Add missing kwonlyargcount argument to + ModuleFinder.replace_paths_in_code(). + +- Issue #20639: calling Path.with_suffix('') allows removing the suffix + again. Patch by July Tikhonov. + +- Issue #21714: Disallow the construction of invalid paths using + Path.with_name(). Original patch by Antony Lee. + +- Issue #21897: Fix a crash with the f_locals attribute with closure + variables when frame.clear() has been called. + +- Issue #21151: Fixed a segfault in the winreg module when ``None`` is passed + as a ``REG_BINARY`` value to SetValueEx. Patch by John Ehresman. + +- Issue #21090: io.FileIO.readall() does not ignore I/O errors anymore. Before, + it ignored I/O errors if at least the first C call read() succeed. + +- Issue #21781: ssl.RAND_add() now supports strings longer than 2 GB. + +- Issue #11453: asyncore: emit a ResourceWarning when an unclosed file_wrapper + object is destroyed. The destructor now closes the file if needed. The + close() method can now be called twice: the second call does nothing. + +- Issue #21858: Better handling of Python exceptions in the sqlite3 module. + +- Issue #21476: Make sure the email.parser.BytesParser TextIOWrapper is + discarded after parsing, so the input file isn't unexpectedly closed. + +- Issue #21729: Used the "with" statement in the dbm.dumb module to ensure + files closing. Patch by Claudiu Popa. + +- Issue #21491: socketserver: Fix a race condition in child processes reaping. + +- Issue #21832: Require named tuple inputs to be exact strings. + +- Issue #19145: The times argument for itertools.repeat now handles + negative values the same way for keyword arguments as it does for + positional arguments. + +- Issue #21812: turtle.shapetransform did not tranform the turtle on the + first call. (Issue identified and fixed by Lita Cho.) + +- Issue #21635: The difflib SequenceMatcher.get_matching_blocks() method + cache didn't match the actual result. The former was a list of tuples + and the latter was a list of named tuples. + +- Issue #21722: The distutils "upload" command now exits with a non-zero + return code when uploading fails. Patch by Martin Dengler. + +- Issue #21723: asyncio.Queue: support any type of number (ex: float) for the + maximum size. Patch written by Vajrasky Kok. + +- Issue #21326: Add a new is_closed() method to asyncio.BaseEventLoop. + run_forever() and run_until_complete() methods of asyncio.BaseEventLoop now + raise an exception if the event loop was closed. + +- Issue #21774: Fixed NameError for an incorrect variable reference in the + XML Minidom code for creating processing instructions. + (Found and fixed by Claudiu Popa.) + +- Issue #21766: Prevent a security hole in CGIHTTPServer by URL unquoting paths + before checking for a CGI script at that path. + +- Issue #21310: Fixed possible resource leak in failed open(). + +- Issue #21677: Fixed chaining nonnormalized exceptions in io close() methods. + +- Issue #11709: Fix the pydoc.help function to not fail when sys.stdin is not a + valid file. + +- Issue #13223: Fix pydoc.writedoc so that the HTML documentation for methods + that use 'self' in the example code is generated correctly. + +- Issue #21463: In urllib.request, fix pruning of the FTP cache. + +- Issue #21618: The subprocess module could fail to close open fds that were + inherited by the calling process and already higher than POSIX resource + limits would otherwise allow. On systems with a functioning /proc/self/fd + or /dev/fd interface the max is now ignored and all fds are closed. + +- Issue #21552: Fixed possible integer overflow of too long string lengths in + the tkinter module on 64-bit platforms. + +- Issue #14315: The zipfile module now ignores extra fields in the central + directory that are too short to be parsed instead of letting a struct.unpack + error bubble up as this "bad data" appears in many real world zip files in + the wild and is ignored by other zip tools. + +- Issue #21402: tkinter.ttk now works when default root window is not set. + +- Issue #10203: sqlite3.Row now truly supports sequence protocol. In particular + it supports reverse() and negative indices. Original patch by Claudiu Popa. + +- Issue #18807: If copying (no symlinks) specified for a venv, then the python + interpreter aliases (python, python3) are now created by copying rather than + symlinking. + +- Issue #14710: pkgutil.get_loader() no longer raises an exception when None is + found in sys.modules. + +- Issue #14710: pkgutil.find_loader() no longer raises an exception when a + module doesn't exist. + +- Issue #21481: Argparse equality and inequality tests now return + NotImplemented when comparing to an unknown type. + +- Issue #8743: Fix interoperability between set objects and the + collections.Set() abstract base class. + +- Issue #13355: random.triangular() no longer fails with a ZeroDivisionError + when low equals high. + +- Issue #21538: The plistlib module now supports loading of binary plist files + when reference or offset size is not a power of two. + +- Issue #21801: Validate that __signature__ is None or an instance of Signature. + +- Issue #21923: Prevent AttributeError in distutils.sysconfig.customize_compiler + due to possible uninitialized _config_vars. + +- Issue #21323: Fix http.server to again handle scripts in CGI subdirectories, + broken by the fix for security issue #19435. Patch by Zach Byrne. + +Extension Modules +----------------- + +- Issue #22176: Update the ctypes module's libffi to v3.1. This release + adds support for the Linux AArch64 and POWERPC ELF ABIv2 little endian + architectures. + +Build +----- + +- Issue #15661: python.org OS X installers are now distributed as signed + installer packages compatible with the Gatekeeper security feature. + +- Issue #21958: Define HAVE_ROUND when building with Visual Studio 2013 and + above. Patch by Zachary Turner. + +- Issue #15759: "make suspicious", "make linkcheck" and "make doctest" in Doc/ + now display special message when and only when there are failures. + +- Issue #17095: Fix Modules/Setup *shared* support. + +- Issue #21811: Anticipated fixes to support OS X versions > 10.9. + +- Issue #21166: Prevent possible segfaults and other random failures of + python --generate-posix-vars in pybuilddir.txt build target. + +IDLE +---- + +- Issue #17390: Adjust Editor window title; remove 'Python', + move version to end. + +- Issue #14105: Idle debugger breakpoints no longer disappear + when inseting or deleting lines. + +- Issue #17172: Turtledemo can now be run from Idle. + Currently, the entry is on the Help menu, but it may move to Run. + Patch by Ramchandra Apt and Lita Cho. + +- Issue #21765: Add support for non-ascii identifiers to HyperParser. + +- Issue #21940: Add unittest for WidgetRedirector. Initial patch by Saimadhav + Heblikar. + +- Issue #18592: Add unittest for SearchDialogBase. Patch by Phil Webster. + +- Issue #21694: Add unittest for ParenMatch. Patch by Saimadhav Heblikar. + +- Issue #21686: add unittest for HyperParser. Original patch by Saimadhav + Heblikar. + +- Issue #12387: Add missing upper(lower)case versions of default Windows key + bindings for Idle so Caps Lock does not disable them. Patch by Roger Serwy. + +- Issue #21695: Closing a Find-in-files output window while the search is + still in progress no longer closes Idle. + +- Issue #18910: Add unittest for textView. Patch by Phil Webster. + +- Issue #18292: Add unittest for AutoExpand. Patch by Saihadhav Heblikar. + +- Issue #18409: Add unittest for AutoComplete. Patch by Phil Webster. + +Tests +----- + +- Issue #22166: With the assistance of a new internal _codecs._forget_codec + helping function, test_codecs now clears the encoding caches to avoid the + appearance of a reference leak + +- Issue #22236: Tkinter tests now don't reuse default root window. New root + window is created for every test class. + +- Issue #20746: Fix test_pdb to run in refleak mode (-R). Patch by Xavier + de Gaye. + +- Issue #22060: test_ctypes has been somewhat cleaned up and simplified; it + now uses unittest test discovery to find its tests. + +- Issue #22104: regrtest.py no longer holds a reference to the suite of tests + loaded from test modules that don't define test_main(). + +- Issue #22002: Added ``load_package_tests`` function to test.support and used + it to implement/augment test discovery in test_asyncio, test_email, + test_importlib, test_json, and test_tools. + +- Issue #21976: Fix test_ssl to accept LibreSSL version strings. Thanks + to William Orr. + +- Issue #21918: Converted test_tools from a module to a package containing + separate test files for each tested script. + +- Issue #20155: Changed HTTP method names in failing tests in test_httpservers + so that packet filtering software (specifically Windows Base Filtering Engine) + does not interfere with the transaction semantics expected by the tests. + +- Issue #19493: Refactored the ctypes test package to skip tests explicitly + rather than silently. + +- Issue #18492: All resources are now allowed when tests are not run by + regrtest.py. + +- Issue #21634: Fix pystone micro-benchmark: use floor division instead of true + division to benchmark integers instead of floating point numbers. Set pystone + version to 1.2. Patch written by Lennart Regebro. + +- Issue #21605: Added tests for Tkinter images. + +- Issue #21493: Added test for ntpath.expanduser(). Original patch by + Claudiu Popa. + +- Issue #19925: Added tests for the spwd module. Original patch by Vajrasky Kok. + +- Issue #21522: Added Tkinter tests for Listbox.itemconfigure(), + PanedWindow.paneconfigure(), and Menu.entryconfigure(). + +Documentation +------------- + +- Issue #21777: The binary sequence methods on bytes and bytearray are now + documented explicitly, rather than assuming users will be able to derive + the expected behaviour from the behaviour of the corresponding str methods. + +Windows +------- + +- Issue #21671, #22160, CVE-2014-0224: The bundled version of OpenSSL has been + updated to 1.0.1i. + +- Issue #10747: Use versioned labels in the Windows start menu. + Patch by Olive Kilburn. + +Tools/Demos +----------- + +- Issue #22201: Command-line interface of the zipfile module now correctly + extracts ZIP files with directory entries. Patch by Ryan Wilson. + +- Issue #21906: Make Tools/scripts/md5sum.py work in Python 3. + Patch by Zachary Ware. + +- Issue #21629: Fix Argument Clinic's "--converters" feature. + + +What's New in Python 3.4.1? +=========================== + +Release date: 2014-05-18 + +Core and Builtins +----------------- + +- Issue #21418: Fix a crash in the builtin function super() when called without + argument and without current frame (ex: embedded Python). + +- Issue #21425: Fix flushing of standard streams in the interactive + interpreter. + +- Issue #21435: In rare cases, when running finalizers on objects in cyclic + trash a bad pointer dereference could occur due to a subtle flaw in + internal iteration logic. + +Library +------- + +- Issue #10744: Fix PEP 3118 format strings on ctypes objects with a nontrivial + shape. + +- Issue #20998: Fixed re.fullmatch() of repeated single character pattern + with ignore case. Original patch by Matthew Barnett. + +- Issue #21075: fileinput.FileInput now reads bytes from standard stream if + binary mode is specified. Patch by Sam Kimbrel. + +- Issue #21396: Fix TextIOWrapper(..., write_through=True) to not force a + flush() on the underlying binary stream. Patch by akira. + +- Issue #21470: Do a better job seeding the random number generator by + using enough bytes to span the full state space of the Mersenne Twister. + +- Issue #21398: Fix an unicode error in the pydoc pager when the documentation + contains characters not encodable to the stdout encoding. + +Tests +----- + +- Issue #17756: Fix test_code test when run from the installed location. + +- Issue #17752: Fix distutils tests when run from the installed location. + +IDLE +---- + +- Issue #18104: Add idlelib/idle_test/htest.py with a few sample tests to begin + consolidating and improving human-validated tests of Idle. Change other files + as needed to work with htest. Running the module as __main__ runs all tests. + + +What's New in Python 3.4.1rc1? +============================== + +Release date: 2014-05-05 + +Core and Builtins +----------------- + +- Issue #21274: Define PATH_MAX for GNU/Hurd in Python/pythonrun.c. + +- Issue #21209: Fix sending tuples to custom generator objects with the yield + from syntax. + +- Issue #21134: Fix segfault when str is called on an uninitialized + UnicodeEncodeError, UnicodeDecodeError, or UnicodeTranslateError object. + +- Issue #19537: Fix PyUnicode_DATA() alignment under m68k. Patch by + Andreas Schwab. + +- Issue #20929: Add a type cast to avoid shifting a negative number. + +- Issue #20731: Properly position in source code files even if they + are opened in text mode. Patch by Serhiy Storchaka. + +- Issue #20637: Key-sharing now also works for instance dictionaries of + subclasses. Patch by Peter Ingebretson. + +- Issue #12546: Allow ``\x00`` to be used as a fill character when using str, int, + float, and complex __format__ methods. + +- Issue #13598: Modify string.Formatter to support auto-numbering of + replacement fields. It now matches the behavior of str.format() in + this regard. Patches by Phil Elson and Ramchandra Apte. + +Library +------- + +- Issue #21088: Bugfix for curses.window.addch() regression in 3.4.0. + In porting to Argument Clinic, the first two arguments were reversed. + +- Issue #21469: Reduced the risk of false positives in robotparser by + checking to make sure that robots.txt has been read or does not exist + prior to returning True in can_fetch(). + +- Issue #21321: itertools.islice() now releases the reference to the source + iterator when the slice is exhausted. Patch by Anton Afanasyev. + +- Issue #9815: assertRaises now tries to clear references to local variables + in the exception's traceback. + +- Issue #13204: Calling sys.flags.__new__ would crash the interpreter, + now it raises a TypeError. + +- Issue #19385: Make operations on a closed dbm.dumb database always raise the + same exception. + +- Issue #21207: Detect when the os.urandom cached fd has been closed or + replaced, and open it anew. + +- Issue #21291: subprocess's Popen.wait() is now thread safe so that + multiple threads may be calling wait() or poll() on a Popen instance + at the same time without losing the Popen.returncode value. + +- Issue #21127: Path objects can now be instantiated from str subclass + instances (such as ``numpy.str_``). + +- Issue #15002: urllib.response object to use _TemporaryFileWrapper (and + _TemporaryFileCloser) facility. Provides a better way to handle file + descriptor close. Patch contributed by Christian Theune. + +- Issue #12220: mindom now raises a custom ValueError indicating it doesn't + support spaces in URIs instead of letting a 'split' ValueError bubble up. + +- Issue #21239: patch.stopall() didn't work deterministically when the same + name was patched more than once. + +- Issue #21222: Passing name keyword argument to mock.create_autospec now + works. + +- Issue #21197: Add lib64 -> lib symlink in venvs on 64-bit non-OS X POSIX. + +- Issue #17498: Some SMTP servers disconnect after certain errors, violating + strict RFC conformance. Instead of losing the error code when we issue the + subsequent RSET, smtplib now returns the error code and defers raising the + SMTPServerDisconnected error until the next command is issued. + +- Issue #17826: setting an iterable side_effect on a mock function created by + create_autospec now works. Patch by Kushal Das. + +- Issue #7776: Fix ``Host:`` header and reconnection when using + http.client.HTTPConnection.set_tunnel(). Patch by Nikolaus Rath. + +- Issue #20968: unittest.mock.MagicMock now supports division. + Patch by Johannes Baiter. + +- Issue #21529 (CVE-2014-4616): Fix arbitrary memory access in + JSONDecoder.raw_decode with a negative second parameter. Bug reported by Guido + Vranken. + +- Issue #21169: getpass now handles non-ascii characters that the + input stream encoding cannot encode by re-encoding using the + replace error handler. + +- Issue #21171: Fixed undocumented filter API of the rot13 codec. + Patch by Berker Peksag. + +- Issue #21172: isinstance check relaxed from dict to collections.Mapping. + +- Issue #21155: asyncio.EventLoop.create_unix_server() now raises a ValueError + if path and sock are specified at the same time. + +- Issue #21149: Improved thread-safety in logging cleanup during interpreter + shutdown. Thanks to Devin Jeanpierre for the patch. + +- Issue #20145: `assertRaisesRegex` and `assertWarnsRegex` now raise a + TypeError if the second argument is not a string or compiled regex. + +- Issue #21058: Fix a leak of file descriptor in + :func:`tempfile.NamedTemporaryFile`, close the file descriptor if + :func:`io.open` fails + +- Issue #21200: Return None from pkgutil.get_loader() when __spec__ is missing. + +- Issue #21013: Enhance ssl.create_default_context() when used for server side + sockets to provide better security by default. + +- Issue #20633: Replace relative import by absolute import. + +- Issue #20980: Stop wrapping exception when using ThreadPool. + +- Issue #21082: In os.makedirs, do not set the process-wide umask. Note this + changes behavior of makedirs when exist_ok=True. + +- Issue #20990: Fix issues found by pyflakes for multiprocessing. + +- Issue #21015: SSL contexts will now automatically select an elliptic + curve for ECDH key exchange on OpenSSL 1.0.2 and later, and otherwise + default to "prime256v1". + +- Issue #20995: Enhance default ciphers used by the ssl module to enable + better security an prioritize perfect forward secrecy. + +- Issue #20884: Don't assume that __file__ is defined on importlib.__init__. + +- Issue #21499: Ignore __builtins__ in several test_importlib.test_api tests. + +- Issue #20879: Delay the initialization of encoding and decoding tables for + base32, ascii85 and base85 codecs in the base64 module, and delay the + initialization of the unquote_to_bytes() table of the urllib.parse module, to + not waste memory if these modules are not used. + +- Issue #19157: Include the broadcast address in the usuable hosts for IPv6 + in ipaddress. + +- Issue #11599: When an external command (e.g. compiler) fails, distutils now + prints out the whole command line (instead of just the command name) if the + environment variable DISTUTILS_DEBUG is set. + +- Issue #4931: distutils should not produce unhelpful "error: None" messages + anymore. distutils.util.grok_environment_error is kept but doc-deprecated. + +- Issue #20875: Prevent possible gzip "'read' is not defined" NameError. + Patch by Claudiu Popa. + +- Issue #11558: ``email.message.Message.attach`` now returns a more + useful error message if ``attach`` is called on a message for which + ``is_multipart`` is False. + +- Issue #20283: RE pattern methods now accept the string keyword parameters + as documented. The pattern and source keyword parameters are left as + deprecated aliases. + +- Issue #20778: Fix modulefinder to work with bytecode-only modules. + +- Issue #20791: copy.copy() now doesn't make a copy when the input is + a bytes object. Initial patch by Peter Otten. + +- Issue #19748: On AIX, time.mktime() now raises an OverflowError for year + outsize range [1902; 2037]. + +- Issue #20816: Fix inspect.getcallargs() to raise correct TypeError for + missing keyword-only arguments. Patch by Jeremiah Lowin. + +- Issue #20817: Fix inspect.getcallargs() to fail correctly if more + than 3 arguments are missing. Patch by Jeremiah Lowin. + +- Issue #6676: Ensure a meaningful exception is raised when attempting + to parse more than one XML document per pyexpat xmlparser instance. + (Original patches by Hirokazu Yamamoto and Amaury Forgeot d'Arc, with + suggested wording by David Gutteridge) + +- Issue #21117: Fix inspect.signature to better support functools.partial. + Due to the specifics of functools.partial implementation, + positional-or-keyword arguments passed as keyword arguments become + keyword-only. + +- Issue #21209: Fix asyncio.tasks.CoroWrapper to workaround a bug + in yield-from implementation in CPythons prior to 3.4.1. + +- asyncio: Add gi_{frame,running,code} properties to CoroWrapper + (upstream issue #163). + +- Issue #21311: Avoid exception in _osx_support with non-standard compiler + configurations. Patch by John Szakmeister. + +- Issue #11571: Ensure that the turtle window becomes the topmost window + when launched on OS X. + +Extension Modules +----------------- + +- Issue #21276: posixmodule: Don't define USE_XATTRS on KFreeBSD and the Hurd. + +- Issue #21226: Set up modules properly in PyImport_ExecCodeModuleObject + (and friends). + +IDLE +---- + +- Issue #21139: Change default paragraph width to 72, the PEP 8 recommendation. + +- Issue #21284: Paragraph reformat test passes after user changes reformat width. + +- Issue #17654: Ensure IDLE menus are customized properly on OS X for + non-framework builds and for all variants of Tk. + +Build +----- + +- The Windows build now includes OpenSSL 1.0.1g + +- Issue #21285: Refactor and fix curses configure check to always search + in a ncursesw directory. + +- Issue #15234: For BerkelyDB and Sqlite, only add the found library and + include directories if they aren't already being searched. This avoids + an explicit runtime library dependency. + +- Issue #20644: OS X installer build support for documentation build changes + in 3.4.1: assume externally supplied sphinx-build is available in /usr/bin. + +C API +----- + +- Issue #20942: PyImport_ImportFrozenModuleObject() no longer sets __file__ to + match what importlib does; this affects _frozen_importlib as well as any + module loaded using imp.init_frozen(). + +Documentation +------------- + +- Issue #17386: Expanded functionality of the ``Doc/make.bat`` script to make + it much more comparable to ``Doc/Makefile``. + +- Issue #21043: Remove the recommendation for specific CA organizations and to + mention the ability to load the OS certificates. + +- Issue #20765: Add missing documentation for PurePath.with_name() and + PurePath.with_suffix(). + +- Issue #19407: New package installation and distribution guides based on + the Python Packaging Authority tools. Existing guides have been retained + as legacy links from the distutils docs, as they still contain some + required reference material for tool developers that isn't recorded + anywhere else. + +- Issue #19697: Document cases where __main__.__spec__ is None. + +Tests +----- + +- Issue #18604: Consolidated checks for GUI availability. All platforms now + at least check whether Tk can be instantiated when the GUI resource is + requested. + +- Issue #21275: Fix a socket test on KFreeBSD. + +- Issue #21223: Pass test_site/test_startup_imports when some of the extensions + are built as builtins. + +- Issue #20635: Added tests for Tk geometry managers. + +- Add test case for freeze. + +- Issue #20743: Fix a reference leak in test_tcl. + +- Issue #21097: Move test_namespace_pkgs into test_importlib. + +- Issue #20939: Avoid various network test failures due to new + redirect of http://www.python.org/ to https://www.python.org: + use http://www.example.com instead. + +- Issue #20668: asyncio tests no longer rely on tests.txt file. + (Patch by Vajrasky Kok) + +- Issue #21093: Prevent failures of ctypes test_macholib on OS X if a + copy of libz exists in $HOME/lib or /usr/local/lib. + +Tools/Demos +----------- + +- Add support for ``yield from`` to 2to3. + +- Add support for the PEP 465 matrix multiplication operator to 2to3. + +- Issue #16047: Fix module exception list and __file__ handling in freeze. + Patch by Meador Inge. + +- Issue #11824: Consider ABI tags in freeze. Patch by Meador Inge. + +- Issue #20535: PYTHONWARNING no longer affects the run_tests.py script. + Patch by Arfrever Frehtes Taifersar Arahesis. + + +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 objects 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 objects destructors. So "unclosed file" resource + warnings are now corretly 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. (Inital + 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 initalization 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 represention 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-existant "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 an 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 delimter 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 + extention 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 overriden with the CC environment variable, use the new compiler as + the default for linking if LDSHARED is not also overriden. 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 interrputed 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 to pass custom options. + +- 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 occured 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 to call 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 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 it's 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 #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. + What's New in Python 3.3.0? =========================== |