Full changelog ============== What's New in Pylint 2.13.9? ---------------------------- Release date: 2022-05-13 * Respect ignore configuration options with ``--recursive=y``. Closes #6471 * Fix false positives for ``no-name-in-module`` and ``import-error`` for ``numpy.distutils`` and ``pydantic``. Closes #6497 * Fix ``IndexError`` crash in ``uninferable_final_decorators`` method. Refs #6531 * Fix a crash in ``unnecessary-dict-index-lookup`` when subscripting an attribute. Closes #6557 * Fix a crash when accessing ``__code__`` and assigning it to a variable. Closes #6539 * Fix a false positive for ``undefined-loop-variable`` when using ``enumerate()``. Closes #6593 What's New in Pylint 2.13.8? ---------------------------- Release date: 2022-05-02 * Fix a false positive for ``undefined-loop-variable`` for a variable used in a lambda inside the first of multiple loops. Closes #6419 * Fix a crash when linting a file that passes an integer ``mode=`` to ``open`` Closes #6414 * Avoid reporting ``superfluous-parens`` on expressions using the ``is not`` operator. Closes #5930 * Fix a false positive for ``undefined-loop-variable`` when the ``else`` of a ``for`` loop raises or returns. Closes #5971 * Fix false positive for ``unused-variable`` for classes inside functions and where a metaclass is provided via a call. Closes #4020 * Fix false positive for ``unsubscriptable-object`` in Python 3.8 and below for statements guarded by ``if TYPE_CHECKING``. Closes #3979 What's New in Pylint 2.13.7? ---------------------------- Release date: 2022-04-20 * Fix a crash caused by using the new config from 2.14.0 in 2.13.x code. Closes #6408 What's New in Pylint 2.13.6? ---------------------------- Release date: 2022-04-20 * Fix a crash in the ``unsupported-membership-test`` checker when assigning multiple constants to class attributes including ``__iter__`` via unpacking. Closes #6366 * Asterisks are no longer required in Sphinx and Google style parameter documentation for ``missing-param-doc`` and are parsed correctly. Closes #5815 Closes #5406 * Fixed a false positive for ``unused-variable`` when a builtin specified in ``--additional-builtins`` is given a type annotation. Closes #6388 * Fixed an ``AstroidError`` in 2.13.0 raised by the ``duplicate-code`` checker with ``ignore-imports`` or ``ignore-signatures`` enabled. Closes #6301 What's New in Pylint 2.13.5? ---------------------------- Release date: 2022-04-06 * Fix false positive regression in 2.13.0 for ``used-before-assignment`` for homonyms between variable assignments in try/except blocks and variables in subscripts in comprehensions. Closes #6069 Closes #6136 * ``lru-cache-decorating-method`` has been renamed to ``cache-max-size-none`` and will only be emitted when ``maxsize`` is ``None``. Closes #6180 * Fix false positive for ``unused-import`` when disabling both ``used-before-assignment`` and ``undefined-variable``. Closes #6089 * Narrow the scope of the ``unnecessary-ellipsis`` checker to: * functions & classes which contain both a docstring and an ellipsis. * A body which contains an ellipsis ``nodes.Expr`` node & at least one other statement. * Fix false positive for ``used-before-assignment`` for assignments taking place via nonlocal declarations after an earlier type annotation. Closes #5394 * Fix crash for ``redefined-slots-in-subclass`` when the type of the slot is not a const or a string. Closes #6100 * Only raise ``not-callable`` when all the inferred values of a property are not callable. Closes #5931 * Fix a false negative for ``subclassed-final-class`` when a set of other messages were disabled. What's New in Pylint 2.13.4? ---------------------------- Release date: 2022-03-31 * Fix false positive regression in 2.13.0 for ``used-before-assignment`` for homonyms between variable assignments in try/except blocks and variables in a comprehension's filter. Closes #6035 * Include ``testing_pylintrc`` in source and wheel distributions. Closes #6028 * Fix crash in ``super-init-not-called`` checker when using ``ctypes.Union``. Closes #6027 * Fix crash for ``unnecessary-ellipsis`` checker when an ellipsis is used inside of a container or a lambda expression. Closes #6036 Closes #6037 Closes #6048 What's New in Pylint 2.13.3? ---------------------------- Release date: 2022-03-29 * Fix false positive for ``unnecessary-ellipsis`` when using an ellipsis as a default argument. Closes #5973 * Fix crash involving unbalanced tuple unpacking. Closes #5998 * Fix false positive for 'nonexistent-operator' when repeated '-' are separated (e.g. by parens). Closes #5769 What's New in Pylint 2.13.2? ---------------------------- Release date: 2022-03-27 * Fix crash when subclassing a ``namedtuple``. Closes #5982 * Fix false positive for ``superfluous-parens`` for patterns like "return (a or b) in iterable". Closes #5803 * Fix a false negative regression in 2.13.0 where ``protected-access`` was not raised on functions. Closes #5989 * Better error messages in case of crash if pylint can't write the issue template. Refs #5987 What's New in Pylint 2.13.1? ---------------------------- Release date: 2022-03-26 * Fix a regression in 2.13.0 where ``used-before-assignment`` was emitted for the usage of a nonlocal in a try block. Closes #5965 * Avoid emitting ``raising-bad-type`` when there is inference ambiguity on the variable being raised. Closes #2793 * Loosen TypeVar default name pattern a bit to allow names with multiple uppercase characters. E.g. ``HVACModeT`` or ``IPAddressT``. Closes #5981 * Fixed false positive for ``unused-argument`` when a ``nonlocal`` name is used in a nested function that is returned without being called by its parent. Closes #5187 * Fix program crash for ``modified_iterating-list/set/dict`` when the list/dict/set being iterated through is a function call. Closes #5969 * Don't emit ``broken-noreturn`` and ``broken-collections-callable`` errors inside ``if TYPE_CHECKING`` blocks. What's New in Pylint 2.13.0? ---------------------------- Release date: 2022-03-24 * Add missing dunder methods to ``unexpected-special-method-signature`` check. * No longer emit ``no-member`` in for loops that reference ``self`` if the binary operation that started the for loop uses a ``self`` that is encapsulated in tuples or lists. Refs pylint-dev/astroid#1360 Closes #4826 * Output better error message if unsupported file formats are used with ``pyreverse``. Closes #5950 * Fix pyreverse diagrams type hinting for classmethods and staticmethods. * Fix pyreverse diagrams type hinting for methods returning None. * Fix matching ``--notes`` options that end in a non-word character. Closes #5840 * Updated the position of messages for class and function definitions to no longer cover the complete definition. Only the ``def`` or ``class`` + the name of the class/function are covered. Closes #5466 * ``using-f-string-in-unsupported-version`` and ``using-final-decorator-in-unsupported-version`` msgids were renamed from ``W1601`` and ``W1602`` to ``W2601`` and ``W2602``. Disabling using these msgids will break. This is done in order to restore consistency with the already existing msgids for ``apply-builtin`` and ``basestring-builtin`` from the now deleted python 3K+ checker. There is now a check that we're not using existing msgids or symbols from deleted checkers. Closes #5729 * The line numbering for messages related to function arguments is now more accurate. This can require some message disables to be relocated to updated positions. * Add ``--recursive`` option to allow recursive discovery of all modules and packages in subtree. Running pylint with ``--recursive=y`` option will check all discovered ``.py`` files and packages found inside subtree of directory provided as parameter to pylint. Closes #352 * Add ``modified-iterating-list``, ``modified-iterating-dict`` and ``modified-iterating-set``, emitted when items are added to or removed from respectively a list, dictionary or set being iterated through. Closes #5348 * Fix false-negative for ``assignment-from-none`` checker using list.sort() method. Closes #5722 * New extension ``import-private-name``: indicate imports of external private packages and objects (prefixed with ``_``). It can be loaded using ``load-plugins=pylint.extensions.private_import``. Closes #5463 * Fixed crash from ``arguments-differ`` and ``arguments-renamed`` when methods were defined outside the top level of a class. Closes #5648 * Removed the deprecated ``check_docs`` extension. You can use the ``docparams`` checker to get the checks previously included in ``check_docs``. Closes #5322 * Added a ``testutil`` extra require to the packaging, as ``gitpython`` should not be a dependency all the time but is still required to use the primer helper code in ``pylint.testutil``. You can install it with ``pip install pylint[testutil]``. Closes #5486 * Reinstated checks from the python3 checker that are still useful for python 3 (``eq-without-hash``). This is now in the ``pylint.extensions.eq_without_hash`` optional extension. Closes #5025 * Fixed an issue where ``ungrouped-imports`` could not be disabled without raising ``useless-suppression``. Refs #2366 * Added several checkers to deal with unicode security issues (see `Trojan Sources `_ and `PEP 672 `_ for details) that also concern the readability of the code. In detail the following checks were added: * ``bad-file-encoding`` checks that the file is encoded in UTF-8 as suggested by `PEP8 `_. UTF-16 and UTF-32 are `not supported by Python `_ at the moment. If this ever changes ``invalid-unicode-codec`` checks that they aren't used, to allow for backwards compatibility. * ``bidirectional-unicode`` checks for bidirectional unicode characters that could make code execution different than what the user expects. * ``invalid-character-backspace``, ``invalid-character-carriage-return``, ``invalid-character-sub``, ``invalid-character-esc``, ``invalid-character-zero-width-space`` and ``invalid-character-nul`` to check for possibly harmful unescaped characters. Closes #5281 * Use the ``tomli`` package instead of ``toml`` to parse ``.toml`` files. Closes #5885 * Fix false positive - Allow unpacking of ``self`` in a subclass of ``typing.NamedTuple``. Closes #5312 * Fixed false negative ``unpacking-non-sequence`` when value is an empty list. Closes #5707 * Better warning messages for useless else or elif when a function returns early. Closes #5614 * Fixed false positive ``consider-using-dict-comprehension`` when creating a dict using a list of tuples where key AND value vary depending on the same condition. Closes #5588 * Fixed false positive for ``global-variable-undefined`` when ``global`` is used with a class name Closes #3088 * Fixed false positive for ``unused-variable`` when a ``nonlocal`` name is assigned as part of a multi-name assignment. Closes #3781 * Fixed a crash in ``unspecified-encoding`` checker when providing ``None`` to the ``mode`` argument of an ``open()`` call. Closes #5731 * Fixed a crash involving a ``NewType`` named with an f-string. Closes #5770 Ref pylint-dev/astroid#1400 * Improved ``bad-open-mode`` message when providing ``None`` to the ``mode`` argument of an ``open()`` call. Closes #5733 * Added ``lru-cache-decorating-method`` checker with checks for the use of ``functools.lru_cache`` on class methods. This is unrecommended as it creates memory leaks by never letting the instance getting garbage collected. Closes #5670 * Fixed crash with recursion error for inference of class attributes that referenced the class itself. Closes #5408 Ref pylint-dev/astroid#1392 * Fixed false positive for ``unused-argument`` when a method overridden in a subclass does nothing with the value of a keyword-only argument. Closes #5771 Ref pylint-dev/astroid#1382 * The issue template for crashes is now created for crashes which were previously not covered by this mechanism. Closes #5668 * Rewrote checker for ``non-ascii-name``. It now ensures __all__ Python names are ASCII and also properly checks the names of imports (``non-ascii-module-import``) as well as file names (``non-ascii-file-name``) and emits their respective new warnings. Non ASCII characters could be homoglyphs (look alike characters) and hard to enter on a non specialized keyboard. See `Confusable Characters in PEP 672`_ * When run in parallel mode ``pylint`` now pickles the data passed to subprocesses with the ``dill`` package. The ``dill`` package has therefore been added as a dependency. * An astroid issue where symlinks were not being taken into account was fixed Closes #1470 Closes #3499 Closes #4302 Closes #4798 Closes #5081 * Fix a crash in ``unused-private-member`` checker when analyzing code using ``type(self)`` in bound methods. Closes #5569 * Optimize parsing of long lines when ``missing-final-newline`` is enabled. Closes #5724 * Fix false positives for ``used-before-assignment`` from using named expressions in a ternary operator test and using that expression as a call argument. Closes #5177, #5212 * Fix false positive for ``undefined-variable`` when ``namedtuple`` class attributes are used as return annotations. Closes #5568 * Fix false negative for ``undefined-variable`` and related variable messages when the same undefined variable is used as a type annotation and is accessed multiple times, or is used as a default argument to a function. Closes #5399 * Pyreverse - add output in mermaidjs format * Emit ``used-before-assignment`` instead of ``undefined-variable`` when attempting to access unused type annotations. Closes #5713 * Added confidence level ``CONTROL_FLOW`` for warnings relying on assumptions about control flow. * ``used-before-assignment`` now considers that assignments in a try block may not have occurred when the except or finally blocks are executed. Closes #85, #2615 * Fixed false negative for ``used-before-assignment`` when a conditional or context manager intervened before the try statement that suggested it might fail. Closes #4045 * Fixed false negative for ``used-before-assignment`` in finally blocks if an except handler did not define the assignment that might have failed in the try block. * Fixed extremely long processing of long lines with comma's. Closes #5483 * Fixed crash on properties and inherited class methods when comparing them for equality against an empty dict. Closes #5646 * Fixed a false positive for ``assigning-non-slot`` when the slotted class defined ``__setattr__``. Closes #3793 * Fixed a false positive for ``invalid-class-object`` when the object being assigned to the ``__class__`` attribute is uninferable. * Fixed false positive for ``used-before-assignment`` with self-referential type annotation in conditional statements within class methods. Closes #5499 * Add checker ``redefined-slots-in-subclass``: Emitted when a slot is redefined in a subclass. Closes #5617 * Fixed false positive for ``global-variable-not-assigned`` when the ``del`` statement is used Closes #5333 * By default, pylint does no longer take files starting with ``.#`` into account. Those are considered ``Emacs file locks``. See https://www.gnu.org/software/emacs/manual/html_node/elisp/File-Locks.html. This behavior can be reverted by redefining the ``ignore-patterns`` option. Closes #367 * Fixed a false positive for ``used-before-assignment`` when a named expression appears as the first value in a container. Closes #5112 * ``used-before-assignment`` now assumes that assignments in except blocks may not have occurred and warns accordingly. Closes #4761 * When evaluating statements after an except block, ``used-before-assignment`` assumes that assignments in the except blocks took place if the corresponding try block contained a return statement. Closes #5500 * Fixed a false negative for ``used-before-assignment`` when some but not all except handlers defined a name relied upon after an except block when the corresponding try block contained a return statement. Closes #5524 * When evaluating statements in the ``else`` clause of a loop, ``used-before-assignment`` assumes that assignments in the except blocks took place if the except handlers constituted the only ways for the loop to finish without breaking early. Closes #5683 * ``used-before-assignment`` now checks names in try blocks. * Fixed false positive with ``used-before-assignment`` for assignment expressions in lambda statements. Closes #5360, #3877 * Fixed a false positive (affecting unreleased development) for ``used-before-assignment`` involving homonyms between filtered comprehensions and assignments in except blocks. Closes #5586 * Fixed crash with slots assignments and annotated assignments. Closes #5479 * Fixed crash on list comprehensions that used ``type`` as inner variable name. Closes #5461 * Fixed crash in ``use-maxsplit-arg`` checker when providing the ``sep`` argument to ``str.split()`` by keyword. Closes #5737 * Fix false positive for ``unused-variable`` for a comprehension variable matching an outer scope type annotation. Closes #5326 * Fix false negative for ``undefined-variable`` for a variable used multiple times in a comprehension matching an unused outer scope type annotation. Closes #5654 * Some files in ``pylint.testutils`` were deprecated. In the future imports should be done from the ``pylint.testutils.functional`` namespace directly. * Fixed false positives for ``no-value-for-parameter`` with variadic positional arguments. Closes #5416 * ``safe_infer`` no longer makes an inference when given two function definitions with differing numbers of arguments. Closes #3675 * Fix ``comparison-with-callable`` false positive for callables that raise, such as typing constants. Closes #5557 * Fixed a crash on ``__init__`` nodes when the attribute was previously uninferable due to a cache limit size. This limit can be hit when the inheritance pattern of a class (and therefore of the ``__init__`` attribute) is very large. Closes #5679 * Fix false positive for ``used-before-assignment`` from a class definition nested under a function subclassing a class defined outside the function. Closes #4590 * Fix ``unnecessary_dict_index_lookup`` false positive when deleting a dictionary's entry. Closes #4716 * Fix false positive for ``used-before-assignment`` when an except handler shares a name with a test in a filtered comprehension. Closes #5817 * Fix crash in ``unnecessary-dict-index-lookup`` checker if the output of ``items()`` is assigned to a 1-tuple. Closes #5504 * When invoking ``pylint``, ``epylint``, ``symilar`` or ``pyreverse`` by importing them in a python file you can now pass an ``argv`` keyword besides patching ``sys.argv``. Closes #5320 * The ``PyLinter`` class will now be initialized with a ``TextReporter`` as its reporter if none is provided. * Fix ``super-init-not-called`` when parent or ``self`` is a ``Protocol`` Closes #4790 * Fix false positive ``not-callable`` with attributes that alias ``NamedTuple`` Fixes part of #1730 * Emit ``redefined-outer-name`` when a nested except handler shadows an outer one. Closes #4434 Closes #5370 * Fix false positive ``super-init-not-called`` for classes that inherit their ``init`` from a parent. Closes #4941 * ``encoding`` can now be supplied as a positional argument to calls that open files without triggering ``unspecified-encoding``. Closes #5638 * Fatal errors now emit a score of 0.0 regardless of whether the linted module contained any statements Closes #5451 * ``fatal`` was added to the variables permitted in score evaluation expressions. * The default score evaluation now uses a floor of 0. Closes #2399 * Fix false negative for ``consider-iterating-dictionary`` during membership checks encapsulated in iterables or ``not in`` checks Closes #5323 * Fixed crash on uninferable decorators on Python 3.6 and 3.7 * Add checker ``unnecessary-ellipsis``: Emitted when the ellipsis constant is used unnecessarily. Closes #5460 * Disable checker ``bad-docstring-quotes`` for Python <= 3.7, because in these versions the line numbers for decorated functions and classes are not reliable which interferes with the checker. Closes #3077 * Fixed incorrect classification of Numpy-style docstring as Google-style docstring for docstrings with property setter documentation. Docstring classification is now based on the highest amount of matched sections instead of the order in which the docstring styles were tried. * Fixed detection of ``arguments-differ`` when superclass static methods lacked a ``@staticmethod`` decorator. Closes #5371 * ``TypingChecker`` * Added new check ``broken-noreturn`` to detect broken uses of ``typing.NoReturn`` if ``py-version`` is set to Python ``3.7.1`` or below. https://bugs.python.org/issue34921 * Added new check ``broken-collections-callable`` to detect broken uses of ``collections.abc.Callable`` if ``py-version`` is set to Python ``3.9.1`` or below. https://bugs.python.org/issue42965 * The ``testutils`` for unittests now accept ``end_lineno`` and ``end_column``. Tests without these will trigger a ``DeprecationWarning``. * ``arguments-differ`` will no longer complain about method redefinitions with extra parameters that have default values. Closes #1556, #5338 * Fixed false positive ``unexpected-keyword-arg`` for decorators. Closes #258 * Importing the deprecated stdlib module ``xml.etree.cElementTree`` now emits ``deprecated_module``. Closes #5862 * Disables for ``deprecated-module`` and similar warnings for stdlib features deprecated in newer versions of Python no longer raise ``useless-suppression`` when linting with older Python interpreters where those features are not yet deprecated. * Importing the deprecated stdlib module ``distutils`` now emits ``deprecated_module`` on Python 3.10+. * ``missing-raises-doc`` will now check the class hierarchy of the raised exceptions .. code-block:: python def my_function(): """My function. Raises: Exception: if something fails """ raise ValueError Closes #4955 * Disable spellchecking of mypy rule names in ignore directives. Closes #5929 * Allow disabling ``duplicate-code`` with a disable comment when running through pylint. Closes #214 * Improve ``invalid-name`` check for ``TypeVar`` names. The accepted pattern can be customized with ``--typevar-rgx``. Closes #3401 * Added new checker ``typevar-name-missing-variance``. Emitted when a covariant or contravariant ``TypeVar`` does not end with ``_co`` or ``_contra`` respectively or when a ``TypeVar`` is not either but has a suffix. * Allow usage of mccabe 0.7.x release Closes #5878 * Fix ``unused-private-member`` false positive when accessing private methods through ``property``. Closes #4756 .. _`Confusable Characters in PEP 672`: https://peps.python.org/pep-0672/#confusable-characters-in-identifiers