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Full changelog
==============
What's New in Pylint 2.12.2?
----------------------------
Release date: 2021-11-25
* Fixed a false positive for ``unused-import`` where everything
was not analyzed properly inside typing guards.
* Fixed a false-positive regression for ``used-before-assignment`` for
typed variables in the body of class methods that reference the same class
Closes #5342
* Specified that the ``ignore-paths`` option considers "\" to represent a
windows directory delimiter instead of a regular expression escape
character.
* Fixed a crash with the ``ignore-paths`` option when invoking the option
via the command line.
Closes #5437
* Fixed handling of Sphinx-style parameter docstrings with asterisks. These
should be escaped with by prepending a "\".
Closes #5406
* Add ``endLine`` and ``endColumn`` keys to output of ``JSONReporter``.
Closes #5380
* Fixed handling of Google-style parameter specifications where descriptions
are on the line following the parameter name. These were generating
false positives for ``missing-param-doc``.
Closes #5452
* Fix false negative for ``consider-iterating-dictionary`` during membership checks encapsulated in iterables
or ``not in`` checks
Closes #5323
* ``unused-import`` now check all ancestors for typing guards
Closes #5316
What's New in Pylint 2.12.1?
----------------------------
Release date: 2021-11-25
* Require Python ``3.6.2`` to run pylint.
Closes #5065
What's New in Pylint 2.12.0?
----------------------------
Release date: 2021-11-24
* Upgrade astroid to 2.9.0
Closes #4982
* Add ability to add ``end_line`` and ``end_column`` to the ``--msg-template`` option.
With the standard ``TextReporter`` this will add the line and column number of the
end of a node to the output of Pylint. If these numbers are unknown, they are represented
by an empty string.
* Introduced primer tests and a configuration tests framework. The helper classes available in
``pylint/testutil/`` are still unstable and might be modified in the near future.
Closes #4412 #5287
* Fix ``install graphiz`` message which isn't needed for puml output format.
* ``MessageTest`` of the unittest ``testutil`` now requires the ``confidence`` attribute
to match the expected value. If none is provided it is set to ``UNDEFINED``.
* ``add_message`` of the unittest ``testutil`` now actually handles the ``col_offset`` parameter
and allows it to be checked against actual output in a test.
* Fix a crash in the ``check_elif`` extensions where an undetected if in a comprehension
with an if statement within an f-string resulted in an out of range error. The checker no
longer relies on counting if statements anymore and uses known if statements locations instead.
It should not crash on badly parsed if statements anymore.
* Fix ``simplify-boolean-expression`` when condition can be inferred as False.
Closes #5200
* Fix exception when pyreverse parses ``property function`` of a class.
* The functional ``testutils`` now accept ``end_lineno`` and ``end_column``. Expected
output files without these will trigger a ``DeprecationWarning``. Expected output files
can be easily updated with the ``python tests/test_functional.py --update-functional-output`` command.
* The functional ``testutils`` now correctly check the distinction between ``HIGH`` and
``UNDEFINED`` confidence. Expected output files without defined ``confidence`` levels will now
trigger a ``DeprecationWarning``. Expected output files can be easily updated with the
``python tests/test_functional.py --update-functional-output`` command.
* The functional test runner now supports the option ``min_pyver_end_position`` to control on which python
versions the ``end_lineno`` and ``end_column`` attributes should be checked. The default value is 3.8.
* Fix ``accept-no-yields-doc`` and ``accept-no-return-doc`` not allowing missing ``yield`` or
``return`` documentation when a docstring is partially correct
Closes #5223
* Add an optional extension ``consider-using-any-or-all`` : Emitted when a ``for`` loop only
produces a boolean and could be replaced by ``any`` or ``all`` using a generator. Also suggests
a suitable any or all statement.
Closes #5008
* Properly identify parameters with no documentation and add new message called ``missing-any-param-doc``
Closes #3799
* Add checkers ``overridden-final-method`` & ``subclassed-final-class``
Closes #3197
* Fixed ``protected-access`` for accessing of attributes and methods of inner classes
Closes #3066
* Added support for ``ModuleNotFoundError`` (``import-error`` and ``no-name-in-module``).
``ModuleNotFoundError`` inherits from ``ImportError`` and was added in Python ``3.6``
* ``undefined-variable`` now correctly flags variables which only receive a type annotations
and never get assigned a value
Closes #5140
* ``undefined-variable`` now correctly considers the line numbering and order of classes
used in metaclass declarations
Closes #4031
* ``used-before-assignment`` now correctly considers references to classes as type annotation
or default values in first-level methods
Closes #3771
* ``undefined-variable`` and ``unused-variable`` now correctly trigger for assignment expressions
in functions defaults
Refs #3688
* ``undefined-variable`` now correctly triggers for assignment expressions in if ... else statements
This includes a basic form of control flow inference for if ... else statements using
constant boolean values
Closes #3688
* Added the ``--enable-all-extensions`` command line option. It will load all available extensions
which can be listed by running ``--list-extensions``
* Fix bug with importing namespace packages with relative imports
Closes #2967 and #5131
* Improve and flatten ``unused-wildcard-import`` message
Closes #3859
* In length checker, ``len-as-condition`` has been renamed as
``use-implicit-booleaness-not-len`` in order to be consistent with
``use-implicit-booleaness-not-comparison``.
* Created new ``UnsupportedVersionChecker`` checker class that includes checks for features
not supported by all versions indicated by a ``py-version``.
* Added ``using-f-string-in-unsupported-version`` checker. Issued when ``py-version``
is set to a version that does not support f-strings (< 3.6)
* Fix ``useless-super-delegation`` false positive when default keyword argument is a variable.
* Properly emit ``duplicate-key`` when Enum members are duplicate dictionary keys
Closes #5150
* Use ``py-version`` setting for alternative union syntax check (PEP 604),
instead of the Python interpreter version.
* Subclasses of ``dict`` are regarded as reversible by the ``bad-reversed-sequence`` checker
(Python 3.8 onwards).
Closes #4981
* Support configuring mixin class pattern via ``mixin-class-rgx``
* Added new checker ``use-implicit-booleaness-not-comparison``: Emitted when
collection literal comparison is being used to check for emptiness.
Closes #4774
* ``missing-param-doc`` now correctly parses asterisks for variable length and
keyword parameters
Closes #3733
* ``missing-param-doc`` now correctly handles Numpy parameter documentation without
explicit typing
Closes #5222
* ``pylint`` no longer crashes when checking assignment expressions within if-statements
Closes #5178
* Update ``literal-comparison``` checker to ignore tuple literals
Closes #3031
* Normalize the input to the ``ignore-paths`` option to allow both Posix and
Windows paths
Closes #5194
* Fix double emitting of ``not-callable`` on inferable ``properties``
Closes #4426
* ``self-cls-assignment`` now also considers tuple assignment
* Fix ``missing-function-docstring`` not being able to check ``__init__`` and other
magic methods even if the ``no-docstring-rgx`` setting was set to do so
* Added ``using-final-decorator-in-unsupported-version`` checker. Issued when ``py-version``
is set to a version that does not support ``typing.final`` (< 3.8)
* Added configuration option ``exclude-too-few-public-methods`` to allow excluding
classes from the ``min-public-methods`` checker.
Closes #3370
* The ``--jobs`` parameter now fallbacks to 1 if the host operating system does not
have functioning shared semaphore implementation.
Closes #5216
* Fix crash for ``unused-private-member`` when checking private members on ``__class__``
Closes #5261
* Crashes when a list is encountered in a toml configuration do not happen anymore.
Closes #4580
* Moved ``misplaced-comparison-constant`` to its own extension ``comparison_placement``.
This checker was opinionated and now no longer a default. It can be reactived by adding
``pylint.extensions.comparison_placement`` to ``load-plugins`` in your config.
Closes #1064
* A new ``bad-configuration-section`` checker was added that will emit for misplaced option
in pylint's top level namespace for toml configuration. Top-level dictionaries or option defined
in the wrong section will still silently not be taken into account, which is tracked in a
follow-up issue.
Follow-up in #5259
* Fix crash for ``protected-access`` on (outer) class traversal
* Added new checker ``useless-with-lock`` to find incorrect usage of with statement and threading module locks.
Emitted when ``with threading.Lock():`` is used instead of ``with lock_instance:``.
Closes #5208
* Make yn validator case insensitive, to allow for ``True`` and ``False`` in config files.
* Fix crash on ``open()`` calls when the ``mode`` argument is not a simple string.
Fixes part of #5321
* Inheriting from a class that implements ``__class_getitem__`` no longer raises ``inherit-non-class``.
* Pyreverse - Add the project root directory to sys.path
Closes #2479
* Don't emit ``consider-using-f-string`` if ``py-version`` is set to Python < ``3.6``.
``f-strings`` were added in Python ``3.6``
Closes #5019
* Fix regression for ``unspecified-encoding`` with ``pathlib.Path.read_text()``
Closes #5029
* Don't emit ``consider-using-f-string`` if the variables to be interpolated include a backslash
* Fixed false positive for ``cell-var-from-loop`` when variable is used as the default
value for a keyword-only parameter.
Closes #5012
* Fix false-positive ``undefined-variable`` with ``Lambda``, ``IfExp``, and
assignment expression.
* Fix false-positive ``useless-suppression`` for ``wrong-import-order``
Closes #2366
* Fixed ``toml`` dependency issue
Closes #5066
* Fix false-positive ``useless-suppression`` for ``line-too-long``
Closes #4212
* Fixed ``invalid-name`` not checking parameters of overwritten base ``object`` methods
Closes #3614
* Fixed crash in ``consider-using-f-string`` if ``format`` is not called
Closes #5058
* Fix crash with ``AssignAttr`` in ``if TYPE_CHECKING`` blocks.
Closes #5111
* Improve node information for ``invalid-name`` on function argument.
* Prevent return type checkers being called on functions with ellipses as body
Closes #4736
* Add ``is_sys_guard`` and ``is_typing_guard`` helper functions from astroid
to ``pylint.checkers.utils``.
* Fix regression on ClassDef inference
Closes #5030
Closes #5036
* Fix regression on Compare node inference
Closes #5048
* Fix false-positive ``isinstance-second-argument-not-valid-type`` with ``typing.Callable``.
Closes #3507
Closes #5087
* It is now recommended to do ``pylint`` development on ``Python`` 3.8 or higher. This
allows using the latest ``ast`` parser.
* All standard jobs in the ``pylint`` CI now run on ``Python`` 3.8 by default. We still
support python 3.6 and 3.7 and run tests for those interpreters.
* ``TypingChecker``
* Fix false-negative for ``deprecated-typing-alias`` and ``consider-using-alias``
with ``typing.Type`` + ``typing.Callable``.
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