chore(deps): update pre-commit hook pycqa/pylint to v3 - autoclosed

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
pycqa/pylint	repository	major	v2.15.6 -> v3.1.0

Note: The pre-commit manager in Renovate is not supported by the pre-commit maintainers or community. Please do not report any problems there, instead create a Discussion in the Renovate repository if you have any questions.

---

Release Notes

pycqa/pylint (pycqa/pylint)

v3.1.0

Compare Source

Two new checks--use-yield-from, deprecated-attribute-- and a smattering of bug fixes.

New Features

• Skip consider-using-join check for non-empty separators if an suggest-join-with-non-empty-separator option is set to no.

  Closes #​8701

• Discover .pyi files when linting.

  These can be ignored with the ignore-patterns setting.

  Closes #​9097

• Check TypeAlias and TypeVar (PEP 695) nodes for invalid-name.

  Refs #​9196

• Support for resolving external toml files named pylintrc.toml and .pylintrc.toml.

  Closes #​9228

• Check for .clear, .discard, .pop and remove methods being called on a set while it is being iterated over.

  Closes #​9334

New Checks

• New message use-yield-from added to the refactoring checker. This message is emitted when yielding from a loop can be replaced by yield from.

  Closes #​9229.

• Added a deprecated-attribute message to check deprecated attributes in the stdlib.

  Closes #​8855

False Positives Fixed

• Fixed false positive for inherit-non-class for generic Protocols.

  Closes #​9106

• Exempt TypedDict from typing_extensions from too-many-ancestor checks.

  Refs #​9167

False Negatives Fixed

• Extend broad-exception-raised and broad-exception-caught to except*.

  Closes #​8827

• Fix a false-negative for unnecessary if blocks using a different than expected ordering of arguments.

  Closes #​8947.

Other Bug Fixes

• Improve the message provided for wrong-import-order check. Instead of the import statement ("import x"), the message now specifies the import that is out of order and which imports should come after it. As reported in the issue, this is particularly helpful if there are multiple imports on a single line that do not follow the PEP8 convention.

  The message will report imports as follows:
  For "import X", it will report "(standard/third party/first party/local) import X"
  For "import X.Y" and "from X import Y", it will report "(standard/third party/first party/local) import X.Y"
  The import category is specified to provide explanation as to why pylint has issued the message and guidence to the developer on how to fix the problem.

  Closes #​8808

Other Changes

• Print how many files were checked in verbose mode.

  Closes #​8935

• Fix a crash when an enum class which is also decorated with a dataclasses.dataclass decorator is defined.

  Closes #​9100

Internal Changes

• Update astroid version to 3.1.0.

  Refs #​9457

v3.0.4

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False Positives Fixed

• used-before-assignment is no longer emitted when using a name in a loop and
  depending on an earlier name assignment in an except block paired with
  else: continue.

  Closes #​6804

• Avoid false positives for no-member involving function
  attributes supplied by decorators.

  Closes #​9246

• Fixed false positive nested-min-max for nested lists.

  Closes #​9307

• Fix false positive for used-before-assignment in a finally block
  when assignments took place in both the try block and each exception handler.

  Closes #​9451

Other Bug Fixes

• Catch incorrect ValueError "generator already executing" for Python 3.12.0 - 3.12.2.
  This is fixed upstream in Python 3.12.3.

  Closes #​9138

v3.0.3

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What's new in Pylint 3.0.3?

Release date: 2023-12-11

False Positives Fixed

• Fixed false positive for unnecessary-lambda when the call has keyword arguments but not the lambda.

  Closes #​9148

• Fixed incorrect suggestion for shallow copy in unnecessary-comprehension

  Example of the suggestion:
  #pylint: disable=missing-module-docstring
  a = [1, 2, 3]
  b = [x for x in a]
  b[0] = 0
  print(a) # [1, 2, 3]

  After changing b = [x for x in a] to b = a based on the suggestion, the script now prints [0, 2, 3]. The correct suggestion should be use list(a) to preserve the original behavior.

  Closes #​9172

• Fix false positives for undefined-variable and unused-argument for
  classes and functions using Python 3.12 generic type syntax.

  Closes #​9193

• Fixed pointless-string-statement false positive for docstrings
  on Python 3.12 type aliases.

  Closes #​9268

• Fix false positive for invalid-exception-operation when concatenating tuples
  of exception types.

  Closes #​9288

Other Bug Fixes

• Fix a bug where pylint was unable to walk recursively through a directory if the
  directory has an __init__.py file.

  Closes #​9210

v3.0.2

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False Positives Fixed

• Fix used-before-assignment false positive for generic type syntax (PEP 695, Python 3.12).

  Closes #​9110

Other Bug Fixes

• Escape special symbols and newlines in messages.

  Closes #​7874

• Fixes suggestion for nested-min-max for expressions with additive operators, list and dict comprehensions.

  Closes #​8524

• Fixes ignoring conditional imports with ignore-imports=y.

  Closes #​8914

• Emit inconsistent-quotes for f-strings with 3.12 interpreter only if targeting pre-3.12 versions.

  Closes #​9113

v3.0.1

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False Positives Fixed

• Fixed false positive for inherit-non-class for generic Protocols.

  Closes #​9106

Other Changes

• Fix a crash when an enum class which is also decorated with a dataclasses.dataclass decorator is defined.

  Closes #​9100

v3.0.0

Compare Source

Pylint now support python 3.12 officially.

This long anticipated major version also provides some important usability and performance improvements, along with enacting necessary breaking changes and long-announced deprecations. The documentation of each message with an example is very close too.

The required astroid version is now 3.0.0. See the astroid changelog for additional fixes, features, and performance improvements applicable to pylint.

Our code is now fully typed. The invalid-name message no longer checks for a minimum length of 3 characters by default. Dependencies like wrapt or setuptools were removed.

A new json2 reporter has been added. It features an enriched output that is easier to parse and provides more info, here's a sample output.

{
    "messages": [
        {
            "type": "convention",
            "symbol": "line-too-long",
            "message": "Line too long (1/2)",
            "messageId": "C0301",
            "confidence": "HIGH",
            "module": "0123",
            "obj": "",
            "line": 1,
            "column": 0,
            "endLine": 1,
            "endColumn": 4,
            "path": "0123",
            "absolutePath": "0123"
        }
    ],
    "statistics": {
        "messageTypeCount": {
            "fatal": 0,
            "error": 0,
            "warning": 0,
            "refactor": 0,
            "convention": 1,
            "info": 0
        },
        "modulesLinted": 1,
        "score": 5.0
    }
}

Breaking Changes

• Enabling or disabling individual messages will now take effect even if an
  --enable=all or disable=all follows in the same configuration file
  (or on the command line).

  This means for the following example, fixme messages will now be emitted:

      pylint my_module --enable=fixme --disable=all

  To regain the prior behavior, remove the superfluous earlier option.

  Closes #​3696

• Remove support for launching pylint with Python 3.7.
  Code that supports Python 3.7 can still be linted with the --py-version=3.7 setting.

  Refs #​6306

• Disables placed in a try block now apply to the except block.
  Previously, they only happened to do so in the presence of an else clause.

  Refs #​7767

• pyreverse now uses a new default color palette that is more colorblind friendly.
  The color scheme is taken from Paul Tol's Notes <https://personal.sron.nl/~pault/>_.
  If you prefer other colors, you can use the --color-palette option to specify custom colors.

  Closes #​8251

• Everything related to the __implements__ construct was removed. It was based on PEP245
  that was proposed in 2001 and rejected in 2006.

  The capability from pyreverse to take __implements__ into account when generating diagrams
  was also removed.

  Refs #​8404

• pyreverse: Support for the .vcg output format (Visualization of Compiler Graphs) has been dropped.

  Closes #​8416

• The warning when the now useless old pylint cache directory (pylint.d) was
  found was removed. The cache dir is documented in
  the FAQ <https://pylint.readthedocs.io/en/latest/faq.html#where-is-the-persistent-data-stored-to-compare-between-successive-runs>_.

  Refs #​8462

• Following a deprecation period, pylint.config.PYLINTRC was removed.
  Use the pylint.config.find_default_config_files generator instead.

  Closes #​8862

Changes requiring user actions

• The invalid-name message no longer checks for a minimum length of 3 characters by default.
  (This was an unadvertised commingling of concerns between casing
  and name length, and users regularly reported this to be surprising.)

  If checking for a minimum length is still desired, it can be regained in two ways:

  • If you are content with a disallowed-name message (instead of
    invalid-name), then simply add the option bad-names-rgxs="^..?$",
    which will fail 1-2 character-long names. (Ensure you enable
    disallowed-name.)

  • If you would prefer an invalid-name message to be emitted, or would
    prefer finer-grained control over the circumstances in which messages are
    emitted (classes vs. methods, etc.), then avail yourself of the regex
    options described
    here <https://pylint.readthedocs.io/en/stable/user_guide/configuration/all-options.html#main-checker>.
    (In particular, take note of the commented out options in the "example
    configuration" given at the bottom of the section.) The prior regexes can
    be found in the
    pull request <https://github.com/pylint-dev/pylint/pull/8813>
    that removed the length requirements.

  Closes #​2018

• The compare to empty string checker (pylint.extensions.emptystring) and the compare to
  zero checker (pylint.extensions.compare-to-zero) have been removed and their checks are
  now part of the implicit booleaness checker:

  • compare-to-zero was renamed use-implicit-booleaness-not-comparison-to-zero and
    compare-to-empty-string was renamed use-implicit-booleaness-not-comparison-to-string
    and they now need to be enabled explicitly.

  • The pylint.extensions.emptystring and pylint.extensions.compare-to-zero extensions
    no longer exist and need to be removed from the load-plugins option.

  • Messages related to implicit booleaness were made more explicit and actionable.
    This permits to make their likeness explicit and will provide better performance as they
    share most of their conditions to be raised.

  Closes #​6871

• epylint was removed. It now lives at: https://github.com/emacsorphanage/pylint.

  Refs #​7737

• The overgeneral-exceptions option now only takes fully qualified names
  into account (builtins.Exception not Exception). If you overrode
  this option, you need to use the fully qualified name now.

  There's still a warning, but it will be removed in 3.1.0.

  Refs #​8411

• Following a deprecation period, it's no longer possible to use MASTER
  or master as configuration section in setup.cfg or tox.ini. It's bad practice
  to not start a section title with the tool name. Please use pylint.main instead.

  Refs #​8465

• Package stats are now printed when running Pyreverse and a --verbose flag was added to get the original output with parsed modules. You might need to activate the verbose option if you want to keep the old output.

  Closes #​8973

New Features

• A new json2 reporter has been added. It features a more enriched output that is
  easier to parse and provides more info.

  Compared to json the only changes are that messages are now under the "messages"
  key and that "message-id" now follows the camelCase convention and is renamed to
  "messageId".
  The new reporter also reports the "score" of the modules you linted as defined by the
  evaluation option and provides statistics about the modules you linted.

  We encourage users to use the new reporter as the json reporter will no longer
  be maintained.

  Closes #​4741

• In Pyreverse package dependency diagrams, show when a module imports another only for type-checking.

  Closes #​8112

• Add new option (--show-stdlib, -L) to pyreverse.
  This is similar to the behavior of --show-builtin in that standard library
  modules are now not included by default, and this option will include them.

  Closes #​8181

• Add Pyreverse option to exclude standalone nodes from diagrams with --no-standalone.

  Closes #​8476

New Checks

• Added DataclassChecker module and invalid-field-call checker to check for invalid dataclasses.field() usage.

  Refs #​5159

• Add return-in-finally to emit a message if a return statement was found in a finally clause.

  Closes #​8260

• Add a new checker kwarg-superseded-by-positional-arg to warn when a function is called with a keyword argument which shares a name with a positional-only parameter and the function contains a keyword variadic parameter dictionary. It may be surprising behaviour when the keyword argument is added to the keyword variadic parameter dictionary.

  Closes #​8558

Extensions

• Add new prefer-typing-namedtuple message to the CodeStyleChecker to suggest
  rewriting calls to collections.namedtuple as classes inheriting from typing.NamedTuple
  on Python 3.6+.

  Requires load-plugins=pylint.extensions.code_style and enable=prefer-typing-namedtuple to be raised.

  Closes #​8660

False Positives Fixed

• Extend concept of "function ambiguity" in safe_infer() from
  differing number of function arguments to differing set of argument names.

  Solves false positives in tensorflow.

  Closes #​3613

• Fix unused-argument false positive when __new__ does not use all the arguments of __init__.

  Closes #​3670

• Fix a false positive for invalid-name when a type-annotated class variable in an enum.Enum class has no assigned value.

  Refs #​7402

• Fix unused-import false positive for usage of six.with_metaclass.

  Closes #​7506

• Fix false negatives and false positives for too-many-try-statements,
  too-complex, and too-many-branches by correctly counting statements
  under a try.

  Refs #​7767

• When checking for unbalanced dict unpacking in for-loops, Pylint will now test whether the length of each value to be
  unpacked matches the number of unpacking targets. Previously, Pylint would test the number of values for the loop
  iteration, which would produce a false unbalanced-dict-unpacking warning.

  Closes #​8156

• Fix false positive for used-before-assignment when usage and assignment
  are guarded by the same test in different statements.

  Closes #​8167

• Adds asyncSetUp to the default defining-attr-methods list to silence
  attribute-defined-outside-init warning when using
  unittest.IsolatedAsyncioTestCase.

  Refs #​8403

• logging-not-lazy is not longer emitted for explicitly concatenated string arguments.

  Closes #​8410

• Fix false positive for isinstance-second-argument-not-valid-type when union types contains None.

  Closes #​8424

• invalid-name now allows for integers in typealias names:

  • now valid: Good2Name, GoodName2.
  • still invalid: _1BadName.

  Closes #​8485

• No longer consider Union as type annotation as type alias for naming checks.

  Closes #​8487

• unnecessary-lambda no longer warns on lambdas which use its parameters in
  their body (other than the final arguments), e.g.
  lambda foo: (bar if foo else baz)(foo).

  Closes #​8496

• Fixed unused-import so that it observes the dummy-variables-rgx option.

  Closes #​8500

• Union typed variables without assignment are no longer treated as
  TypeAlias.

  Closes #​8540

• Allow parenthesized implicitly concatenated strings when check-str-concat-over-line-jumps is enabled.

  Closes #​8552.

• Fix false positive for positional-only-arguments-expected when a function contains both a positional-only parameter that has a default value, and **kwargs.

  Closes #​8555

• Fix false positive for keyword-arg-before-vararg when a positional-only parameter with a default value precedes *args.

  Closes #​8570

• Fix false positive for arguments-differ when overriding __init_subclass__.

  Closes #​8919

• Fix a false positive for no-value-for-parameter when a staticmethod is called in a class body.

  Closes #​9036

False Negatives Fixed

• Emit used-before-assignment when calling module-level functions before definition.

  Closes #​1144

• Apply infer_kwarg_from_call() to more checks

  These mostly solve false negatives for various checks,
  save for one false positive for use-maxsplit-arg.

  Closes #​7761

• TypeAlias variables defined in functions are now checked for invalid-name errors.

  Closes #​8536

• Fix false negative for no-value-for-parameter when a function, whose signature contains both a positional-only parameter name and also *kwargs, is called with a keyword-argument for name.

  Closes #​8559

• Fix a false negative for too-many-arguments by considering positional-only and keyword-only parameters.

  Closes #​8667

• Emit assignment-from-no-return for calls to builtin methods like dict.update().
  Calls to list.sort() now raise assignment-from-no-return
  rather than assignment-from-none for consistency.

  Closes #​8714
  Closes #​8810

• consider-using-augmented-assign is now applied to dicts and lists as well.

  Closes #​8959

Other Bug Fixes

• Support duplicate-code message when parallelizing with --jobs.

  Closes #​374

• Support cyclic-import message when parallelizing with --jobs.

  Closes #​4171

• --jobs can now be used with --load-plugins.

  This had regressed in astroid 2.5.0.

  Closes #​4874

• docparams extension considers type comments as type documentation.

  Closes #​6287

• When parsing comma-separated lists of regular expressions in the config, ignore
  commas that are inside braces since those indicate quantifiers, not delineation
  between expressions.

  Closes #​7229

• The ignored-modules option will now be correctly taken into account for no-name-in-module.

  Closes #​7578

• sys.argv is now always correctly considered as impossible to infer (instead of
  using the actual values given to pylint).

  Closes #​7710

• Avoid duplicative warnings for unqualified exception names in the overgeneral-exceptions
  setting when running with --jobs.

  Closes #​7774

• Don't show class fields more than once in Pyreverse diagrams.

  Closes #​8189

• Fix used-before-assignment false negative when TYPE_CHECKING imports
  are used in multiple scopes.

  Closes #​8198

• --clear-cache-post-run now also clears LRU caches for pylint utilities
  holding references to AST nodes.

  Closes #​8361

• Fix a crash when TYPE_CHECKING is used without importing it.

  Closes #​8434

• Fix a used-before-assignment false positive when imports
  are made under the TYPE_CHECKING else if branch.

  Closes #​8437

• Fix a regression of preferred-modules where a partial match was used instead of the required full match.

  Closes #​8453

• Fix a crash in pyreverse when "/" characters are used in the output filename e.g pyreverse -o png -p name/ path/to/project.

  Closes #​8504

• Don't show arrows more than once in Pyreverse diagrams.

  Closes #​8522

• Improve output of consider-using-generator message for min() calls with default keyword.

  Closes #​8563

• Fixed a crash when generating a configuration file: tomlkit.exceptions.TOMLKitError: Can't add a table to a dotted key
  caused by tomlkit v0.11.8.

  Closes #​8632

• Fix a line break error in Pyreverse dot output.

  Closes #​8671

• Fix a false positive for method-hidden when using cached_property decorator.

  Closes #​8753

• Dunder methods defined in lambda do not trigger unnecessary-dunder-call anymore, if they cannot be replaced by the non-dunder call.

  Closes #​8769

• Don't show duplicate type annotations in Pyreverse diagrams.

  Closes #​8888

• Fixing inconsistent hashing issue in BaseChecker causing some reports not being exported.

  Closes #​9001

• Don't add Optional to | annotations with None in Pyreverse diagrams.

  Closes #​9014

• Pyreverse doesn't show multiple class association arrows anymore, but only the strongest one.

  Refs #​9045

• Prevented data loss in the linter stats for messages relating
  to the linter itself (e.g. unknown-option-value), fixing
  problems with score, fail-on, etc.

  Closes #​9059

• Fix crash in refactoring checker when unary operand used with variable in for loop.

  Closes #​9074

Other Changes

• Pylint now exposes its type annotations.

  Closes #​5488 and #​2079

• Search for pyproject.toml recursively in parent directories up to a project or file system root.

  Refs #​7163, Closes #​3289

• All code related to the optparse config parsing has been removed.

  Refs #​8405

• Pylint now supports python 3.12.

  Refs #​8718

• Add a CITATION.cff file to the root of the repository containing the necessary metadata to cite Pylint.

  Closes #​8760

• Renamed the "unneeded-not" error into "unnecessary_negation" to be clearer.

  Closes #​8789

Internal Changes

• get_message_definition was removed from the base checker API. You can access
  message definitions through the MessageStore.

  Refs #​8401

• Everything related to the __implements__ construct was removed. It was based on PEP245
  that was proposed in 2001 and rejected in 2006.

  All the classes inheriting Interface in pylint.interfaces were removed.
  Checker should only inherit BaseChecker or any of the other checker types
  from pylint.checkers. Reporter should only inherit BaseReporter.

  Refs #​8404

• modname and msg_store are now required to be given in FileState.
  collect_block_lines has also been removed. Pylinter.current_name
  cannot be null anymore.

  Refs #​8407

• Reporter.set_output was removed in favor of reporter.out = stream.

  Refs #​8408

• A number of old utility functions and classes have been removed:

  MapReduceMixin: To make a checker reduce map data simply implement
  get_map_data and reduce_map_data.

  is_inside_lambda: Use utils.get_node_first_ancestor_of_type(x, nodes.Lambda)

  check_messages: Use utils.only_required_for_messages

  is_class_subscriptable_pep585_with_postponed_evaluation_enabled: Use
  is_postponed_evaluation_enabled(node) and is_node_in_type_annotation_context(node)

  get_python_path: assumption that there's always an init.py is not true since
  python 3.3 and is causing problems, particularly with PEP 420. Use discover_package_path
  and pass source root(s).

  fix_import_path: Use augmented_sys_path and pass additional sys.path
  entries as an argument obtained from discover_package_path.

  get_global_option: Use checker.linter.config to get all global options.

  Related private objects have been removed as well.

  Refs #​8409

• colorize_ansi now only accepts a MessageStyle object.

  Refs #​8412

• Following a deprecation period, Pylinter.check now only works with sequences of strings, not strings.

  Refs #​8463

• Following a deprecation period, ColorizedTextReporter only accepts ColorMappingDict.

  Refs #​8464

• Following a deprecation period, MessageTest's end_line and end_col_offset
  must be accurate in functional tests (for python 3.8 or above on cpython, and for
  python 3.9 or superior on pypy).

  Refs #​8466

• Following a deprecation period, the do_exit argument of the Run class (and of the _Run
  class in testutils) were removed.

  Refs #​8472

• Following a deprecation period, the py_version argument of the
  MessageDefinition.may_be_emitted function is now required. The most likely solution
  is to use 'linter.config.py_version' if you need to keep using this
  function, or to use 'MessageDefinition.is_message_enabled' instead.

  Refs #​8473

• Following a deprecation period, the OutputLine class now requires
  the right number of argument all the time. The functional output can be
  regenerated automatically to achieve that easily.

  Refs #​8474

• Following a deprecation period, is_typing_guard, is_node_in_typing_guarded_import_block and
  is_node_in_guarded_import_block from pylint.utils were removed: use a combination of
  is_sys_guard and in_type_checking_block instead.

  Refs #​8475

• Following a deprecation period, the location argument of the
  Message class must now be a MessageLocationTuple.

  Refs #​8477

• Following a deprecation period, the check_single_file function of the
  Pylinter is replaced by Pylinter.check_single_file_item.

  Refs #​8478

Performance Improvements

• pylint runs (at least) ~5% faster after improvements to astroid
  that make better use of the inference cache.

  Refs pylint-dev/astroid#529

• • Optimize is_trailing_comma().
  • Cache class_is_abstract().

  Refs #​1954

• Exit immediately if all messages are disabled.

  Closes #​8715

v2.17.7

Compare Source

2.17.7 is the last release before we only support pylint 3.0.0 or superior and python 3.8 or superior.

False Positives Fixed

• Fix a regression in pylint 2.17.6 / astroid 2.15.7 causing various
  messages for code involving TypeVar.

  Closes #​9069

Other Bug Fixes

• Fix crash in refactoring checker when unary operand used with variable in for
  loop.

  Closes #​9074

v2.17.6

Compare Source

Other Bug Fixes

• When parsing comma-separated lists of regular expressions in the config,
  ignore commas that are inside braces since those indicate quantifiers, not
  delineation between expressions.

  Closes #​7229

• sys.argv is now always correctly considered as impossible to infer
  (instead of using the actual values given to pylint).

  Closes #​9047

• Don't show class fields more than once in Pyreverse diagrams.

  Closes #​8189

• Don't show arrows more than once in Pyreverse diagrams.

  Closes #​8522

• Don't show duplicate type annotations in Pyreverse diagrams.

  Closes #​8888

• Don't add Optional to | annotations with None in Pyreverse diagrams.

  Closes #​9014

v2.17.5

Compare Source

What's new in Pylint 2.17.5?

Release date: 2023-07-26

False Positives Fixed

• Fix a false positive for unused-variable when there is an import in a
  if TYPE_CHECKING: block and allow-global-unused-variables is set to
  no in the configuration.

  Closes #​8696

• Fix false positives generated when supplying arguments as **kwargs to IO
  calls like open().

  Closes #​8719

• Fix a false positive where pylint was ignoring method calls annotated as
  NoReturn during the inconsistent-return-statements check.

  Closes #​8747

• Exempt parents with only type annotations from the invalid-enum-extension
  message.

  Closes #​8830

Other Bug Fixes

• Fixed crash when a call to super() was placed after an operator (e.g.
  not).

  Closes #​8554

• Fix crash for modified-while-iterating checker when deleting
  members of a dict returned from a call.

  Closes #​8598

• Fix crash in invalid-metaclass check when a metaclass had duplicate
  bases.

  Closes #​8698

• Avoid consider-using-f-string on modulos with brackets in template.

  Closes #​8720.

• Fix a crash when __all__ exists but cannot be inferred.

  Closes #​8740

• Fix crash when a variable is assigned to a class attribute of identical name.

  Closes #​8754

• Fixed a crash when calling copy.copy() without arguments.

  Closes #​8774

Other Changes

• Fix a crash when a nonlocal is defined at module-level.

  Closes #​8735

v2.17.4

Compare Source

False Positives Fixed

• Fix a false positive for bad-dunder-name when there is a user-defined
  __index__ method.

  Closes #​8613

Other Bug Fixes

• pyreverse: added escaping of vertical bar character in annotation labels
  produced by DOT printer to ensure it is not treated as field separator of
  record-based nodes.

  Closes #​8603

• Fixed a crash when generating a configuration file:
  tomlkit.exceptions.TOMLKitError: Can't add a table to a dotted key
  caused by tomlkit v0.11.8.

  Closes #​8632

v2.17.3

Compare Source

What's new in Pylint 2.17.3?

Release date: 2023-04-24

False Positives Fixed

• Fix unused-argument false positive when __new__ does not use all the
  arguments of __init__.

  Closes #​3670

• Fix unused-import false positive for usage of six.with_metaclass.

  Closes #​7506

• logging-not-lazy is not longer emitted for explicitly concatenated string
  arguments.

  Closes #​8410

• Fix false positive for isinstance-second-argument-not-valid-type when union
  types contains None.

  Closes #​8424

• Fixed unused-import so that it observes the dummy-variables-rgx option.

  Closes #​8500

• Union typed variables without assignment are no longer treated as
  TypeAlias.

  Closes #​8540

• Fix false positive for positional-only-arguments-expected when a function
  contains both a positional-only parameter that has a default value, and
  **kwargs.

  Closes #​8555

• Fix false positive for keyword-arg-before-vararg when a positional-only
  parameter with a default value precedes *args.

  Closes #​8570

Other Bug Fixes

• Improve output of consider-using-generator message for min()` calls with default`` keyword.

  Closes #​8563

v2.17.2

Compare Source

False Positives Fixed

• invalid-name now allows for integers in typealias names:

  • now valid: Good2Name, GoodName2.
  • still invalid: _1BadName.

  Closes #​8485

• No longer consider Union as type annotation as type alias for naming
  checks.

  Closes #​8487

• unnecessary-lambda no longer warns on lambdas which use its parameters in
  their body (other than the final arguments), e.g.
  lambda foo: (bar if foo else baz)(foo).

  Closes #​8496

Other Bug Fixes

• Fix a crash in pyreverse when "/" characters are used in the output filename
  e.g pyreverse -o png -p name/ path/to/project.

  Closes #​8504

v2.17.1

Compare Source

False Positives Fixed

• Adds asyncSetUp to the default defining-attr-methods list to silence
  attribute-defined-outside-init warning when using
  unittest.IsolatedAsyncioTestCase.

  Refs #​8403

Other Bug Fixes

• --clear-cache-post-run now also clears LRU caches for pylint utilities
  holding references to AST nodes.

  Closes #​8361

• Fix a crash when TYPE_CHECKING is used without importing it.

  Closes #​8434

• Fix a regression of preferred-modules where a partial match was used
  instead of the required full match.

  Closes #​8453

Internal Changes

• The following utilities are deprecated in favor of the more robust
  in_type_checking_block
  and will be removed in pylint 3.0:

  • is_node_in_guarded_import_block
  • is_node_in_typing_guarded_import_block
  • is_typing_guard

  is_sys_guard is still available, which was part of
  is_node_in_guarded_import_block.

  Refs #​8433

v2.17.0

Compare Source

2.17 is a small release that is the first to support python 3.11 officially
with the addition of TryStar nodes.

There's still two new default checks: bad-chained-comparison and
implicit-flag-alias, one of them already fixed a previously undetected
bug in sentry.

Thanks to the community effort our documentation is almost complete,
and almost all messages should have a proper documentation now.
A big thank you to everyone who participated !

The next release is going to be 3.0.0, bring breaking changes and
enact long announced deprecations. There's going to be frequent beta
releases, before the official releases, everyone is welcome to try the betas
so we find problems before the actual release.

What's new in Pylint 2.17.0?

Release date: 2023-03-08

New Features

• pyreverse now supports custom color palettes with the --color-palette
  option.

  Closes #​6738

• Add invalid-name check for TypeAlias names.

  Closes #​7081

• Accept values of the form <class name>.<attribute name> for the
  exclude-protected list.

  Closes #​7343

• Add --version option to pyreverse.

  Refs #​7851

• Adds new functionality with preferred-modules configuration to detect
  submodules.

  Refs #​7957

• Support implicit namespace packages (PEP 420).

  Closes #​8154

• Add globbing pattern support for --source-roots.

  Closes #​8290

• Support globbing pattern when defining which file/directory/module to lint.

  Closes #​8310

• pylint now supports TryStar nodes from Python 3.11 and should be fully
  compatible with Python 3.11.

  Closes #​8387

New Checks

• Add a bad-chained-comparison check that emits a warning when
  there is a chained comparison where one expression is semantically
  incompatible with the other.

  Closes #​6559

• Adds an implicit-flag-alias check that emits a warning when a class
  derived from enum.IntFlag assigns distinct integer values that share
  common bit positions.

  Refs #​8102

False Positives Fixed

• Fix various false positives for functions that return directly from
  structural pattern matching cases.

  Closes #​5288

• Fix false positive for used-before-assignment when
  typing.TYPE_CHECKING is used with if/elif/else blocks.

  Closes #​7574

• Fix false positive for isinstance-second-argument-not-valid-type with union
  types.

  Closes #​8205

• Fix false positive for used-before-assignment for named expressions
  appearing after the first element in a list, tuple, or set.

  Closes #​8252

• Fix false positive for wrong-spelling-in-comment with class names in a
  python 2 type comment.

  Closes #​8370

False Negatives Fixed

• Fix a false negative for 'missing-parentheses-for-call-in-test' when
  inference
  failed for the internal of the call as we did not need that information to
  raise
  correctly.

  Refs #​8185

• Fix false negative for inconsistent-returns with while-loops.

  Closes #​8280

Other Bug Fixes

• Fix used-before-assignment false positive when the walrus operator
  is used with a ternary operator in dictionary key/value initialization.

  Closes #​8125

• Fix no-name-in-module false positive raised when a package defines a
  variable with the
  same name as one of its submodules.

  Closes #​8148

• Fix a crash happening for python interpreter < 3.9 following a failed typing
  update.

  Closes #​8161

• Fix nested-min-max suggestion message to indicate it's possible to splat
  iterable objects.

  Closes #​8168

• Fix a crash happening when a class attribute was negated in the start
  argument of an enumerate.

  Closes #​8207

• Prevent emitting invalid-name for the line on which a global
  statement is declared.

  Closes #​8307

Other Changes

• Update explanation for global-variable-not-assigned and add confidence.

  Closes #​5073

• The governance model and the path to become a maintainer have been documented
  as part of our effort to guarantee that the software supply chain in which pylint is included is secure.

  Refs #​8329

v2.16.4

Compare Source

False Positives Fixed

• Fix false positive for isinstance-second-argument-not-valid-type with union
  types.

  Closes #​8205

v2.16.3

Compare Source

False Positives Fixed

• Fix false positive for wrong-spelling-in-comment with class names in a
  python 2 type comment.

  Closes #​8370

Other Bug Fixes

• Prevent emitting invalid-name for the line on which a global
  statement is declared.

  Closes #​8307

v2.16.2

Compare Source

New Features

• Add --version option to pyreverse.

  Refs #​7851

False Positives Fixed

• Fix false positive for used-before-assignment when
  typing.TYPE_CHECKING is used with if/elif/else blocks.

  Closes #​7574

• Fix false positive for used-before-assignment for named expressions
  appearing after the first element in a list, tuple, or set.

  Closes #​8252

Other Bug Fixes

• Fix used-before-assignment false positive when the walrus operator
  is used with a ternary operator in dictionary key/value initialization.

  Closes #​8125

• Fix no-name-in-module false positive raised when a package defines a
  variable with the same name as one of its submodules.

  Closes #​8148

• Fix nested-min-max suggestion message to indicate it's possible to splat
  iterable objects.

  Closes #​8168

• Fix a crash happening when a class attribute was negated in the start
  argument of an enumerate.

  Closes #​8207

v2.16.1

Compare Source

Other Bug Fixes

• Fix a crash happening for python interpreter < 3.9 following a failed typing
  update.

  Closes #​8161

v2.16.0

Compare Source

Summary -- Release highlights

In 2.16.0 we added aggregation and composition understanding in pyreverse, and a way to clear
the cache in between run in server mode (originally for the VS Code integration). Apart from the bug
fixes there's also a lot of new checks, and new extensions that have been asked for for a long time
that were implemented.

If you want to benefit from all the new checks load the following plugins::

pylint.extensions.dict_init_mutate,
pylint.extensions.dunder,
pylint.extensions.typing,
pylint.extensions.magic_value,

We still welcome any community effort to help review, integrate, and add good/bad examples to the doc for
#​5953. This should be doable without any pylint or astroid
knowledge, so this is the perfect entrypoint if you want to contribute to pylint or open source without
any experience with our code!

Last but not least @​clavedeluna and @​nickdrozd became triagers, welcome to the team !

What's new in Pylint 2.16.0?

Changes requiring user actions

• The accept-no-raise-doc option related to missing-raises-doc will now
  be correctly taken into account all the time.

  Pylint will no longer raise missing-raises-doc (W9006) when no exceptions are
  documented and accept-no-raise-doc is true (issue #​7208).
  If you were expecting missing-raises-doc errors to be raised in that case,
  you
  will now have to add accept-no-raise-doc=no in your configuration to keep
  the same behavior.
  Closes #​7208

New Features

• Added the no-header output format. If enabled with
  --output-format=no-header, it will not include the module name in the
  output.
  Closes #​5362

• Added configuration option clear-cache-post-run to support server-like
  usage.
  Use this flag if you expect the linted files to be altered between runs.
  Refs #​5401

• Add --allow-reexport-from-package option to configure the
  useless-import-alias check not to emit a warning if a name
  is reexported from a package.
  Closes #​6006

• Update pyreverse to differentiate between aggregations and compositions.
  pyreverse checks if it's an Instance or a Call of an object via method
  parameters (via type hints)
  to decide if it's a composition or an aggregation.
  Refs #​6543

New Checks

• Adds a pointless-exception-statement check that emits a warning when an
  Exception is created and not assigned, raised or returned.
  Refs #​3110

• Add a shadowed-import message for aliased imports.
  Closes #​4836

• Add new check called unbalanced-dict-unpacking to check for unbalanced
  dict unpacking
  in assignment and for loops.
  Closes #​5797

• Add new checker positional-only-arguments-expected to check for cases
  when
  positional-only arguments have been passed as keyword arguments.
  Closes #​6489

• Added singledispatch-method which informs that @singledispatch should
  decorate functions and not class/instance methods.
  Added singledispatchmethod-function which informs that
  @singledispatchmethod should decorate class/instance methods and not
  functions.
  Closes #​6917

• Rename broad-except to broad-exception-caught and add new checker
  broad-exception-raised
  which will warn if general exceptions BaseException or Exception are
  raised.
  Closes #​7494

• Added nested-min-max which flags min(1, min(2, 3)) to simplify to
  min(1, 2, 3).
  Closes #​7546

• Extended use-dict-literal to also warn about call to dict() when
  passing keyword arguments.
  Closes #​7690

• Add named-expr-without-context check to emit a warning if a named
  expression is used outside a context like if, for, while, or
  a comprehension.
  Refs #​7760

• Add invalid-slice-step check to warn about a slice step value of 0
  for common builtin sequences.
  Refs #​7762

• Add consider-refactoring-into-while-condition check to recommend
  refactoring when
  a while loop is defined with a constant condition with an immediate if
  statement to check for break condition as a first statement.
  Closes #​8015

Extensions

• Add new extension checker dict-init-mutate that flags mutating a
  dictionary immediately
  after the dictionary was created.
  Closes #​2876

• Added bad-dunder-name extension check, which flags bad or misspelled
  dunder methods.

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