v2.9.0

• Python 3.10 is now supported.

• Add type annotations to pyreverse dot files

  Closes #1548

• Fix missing support for detecting deprecated aliases to existing
  functions/methods.

  Closes #4618

• astroid has been upgraded to 2.6.1

• Added various deprecated functions/methods for python 3.10, 3.7, 3.6 and 3.3

• Fix false positive useless-type-doc on ignored argument using pylint.extensions.docparams
  when a function was typed using pep484 but not inside the docstring.

  Closes #4117
  Closes #4593

• setuptools_scm has been removed and replaced by tbump in order to not
  have hidden runtime dependencies to setuptools

• Fix a crash when a test function is decorated with @pytest.fixture and astroid can't
  infer the name of the decorator when using open without with.

  Closes #4612

• Added deprecated-decorator: Emitted when deprecated decorator is used.

  Closes #4429

• Added ignore-paths behaviour. Defined regex patterns are matched against full file path.

  Close #2541

• Fix false negative for consider-using-with if calls like open() were used outside of assignment expressions.

• The warning for arguments-differ now signals explicitly the difference it detected
  by naming the argument or arguments that changed and the type of change that occurred.

• Suppress consider-using-with inside context managers.

  Closes #4430

• Added --fail-on option to return non-zero exit codes regardless of --fail-under value.

• numversion tuple contains integers again to fix multiple pylint's plugins that relied on it

  Closes #4420

• Fix false-positive too-many-ancestors when inheriting from builtin classes,
  especially from the collections.abc module

  Closes #4166
  Closes #4415

• Stdlib deprecated modules check is moved to stdlib checker. New deprecated
  modules are added.

• Fix raising false-positive no-member on abstract properties

• Created new error message called arguments-renamed which identifies any changes at the parameter
  names of overridden functions.

  Closes #3536

• New checker consider-using-dict-items. Emitted when iterating over dictionary keys and then
  indexing the same dictionary with the key within loop body.

  Closes #3389

• Don't emit import-error if import guarded behind if sys.version_info >= (x, x)

• Fix incompatibility with Python 3.6.0 caused by typing.Counter and typing.NoReturn usage

  Closes #4412

• New checker use-maxsplit-arg. Emitted either when accessing only the first or last
  element of str.split().

  Closes #4440

• Add ignore_signatures to duplicate code checker

  Closes #3619

• Fix documentation errors in "Block disables" paragraph of User Guide.

• New checker unnecessary-dict-index-lookup. Emitted when iterating over dictionary items
  (key-value pairs) and accessing the value by index lookup.

  Closes #4470

• New checkerconsider-using-from-import. Emitted when a submodule/member of a package is imported and aliased
  with the same name.

  Closes #2309

• Allow comma-separated list in output-format and separate output files for
  each specified format.

  Closes #1798

• Make using-constant-test detect constant tests consisting of list literals like [] and
  [1, 2, 3].

• Improved error message of unnecessary-comprehension checker by providing code suggestion.

  Closes #4499

• New checker unused-private-member. Emitted when a private member (i.e., starts with __) of a class
  is defined but not used.

  Closes #4483

• Fix false negative of consider-using-enumerate when iterating over an attribute.

  Closes #3657

• New checker invalid-class-object. Emitted when a non-class is assigned to a __class__ attribute.

  Closes #585

• Fix a crash when a plugin from the configuration could not be loaded and raise an error
  'bad-plugin-value' instead

  Closes #4555

• Added handling of floating point values when parsing configuration from pyproject.toml

  Closes #4518

• invalid-length-returned, now also works when nothing at all is returned
  following an upgrade in astroid.

• logging-format-interpolation and logging-not-lazy, now works on logger
  class created from renamed logging import following an upgrade in astroid.

• Fix false-positive no-member with generic base class

  Closes pylint-dev/astroid#942

• Fix assigning-non-slot false-positive with base that inherits from typing.Generic

  Closes #4509
  Closes pylint-dev/astroid#999

• New checker invalid-all-format. Emitted when __all__ has an invalid format,
  i.e. isn't a tuple or list.

• Fix false positive unused-variable and undefined-variable with
  Pattern Matching in Python 3.10

• New checker await-outside-async. Emitted when await is used outside an async function.

• Clarify documentation for typing extension.

  Closes #4545

• Add new extension CodeStyleChecker. It includes checkers that can improve code
  consistency. As such they don't necessarily provide a performance benefit
  and are often times opinionated.

• New checker consider-using-tuple. Emitted when an in-place defined
  list or set can be replaced by a tuple.

• New checker consider-using-namedtuple-or-dataclass. Emitted when dictionary values
  can be replaced by namedtuples or dataclass instances.

• Fix error that occurred when using slice as subscript for dict.

• Reduce false-positives around inference of .value and .name
  properties on Enum subclasses, following an upgrade in astroid

  Closes #1932
  Closes #2062

• Fix issue with cached_property that caused invalid-overridden-method error
  when overriding a property.

  Closes #4023

• Fix unused-import false positive for imported modules referenced in
  attribute lookups in type comments.

  Closes #4603

v2.8.3

Pin astroid to 2.5.6 for pylint 2.8.3

v2.8.2

• Keep __pkginfo__.numversion a tuple to avoid breaking pylint-django.

  Closes #4405

• scm_setuptools has been added to the packaging.

• Pylint's tags are now the standard form vX.Y.Z and not pylint-X.Y.Z anymore.

pylint-2.8.1

• Add numversion back (temporarily) in __pkginfo__ because it broke Pylama and revert the unnecessary
  pylint.version breaking change.

  Closes #4399

pylint-2.8.0

• New refactoring message consider-using-with. This message is emitted if resource-allocating functions or methods of the
  standard library (like open() or threading.Lock.acquire()) that can be used as a context manager are called without
  a with block.

  Closes #3413

• Resolve false positives on unused variables in decorator functions

  Closes #4252

• Add new extension ConfusingConsecutiveElifChecker. This optional checker emits a refactoring message (R5601 confusing-consecutive-elif)
  if if/elif statements with different indentation levels follow directly one after the other.

• New option --output=<file> to output result to a file rather than printing to stdout.

  Closes #1070

• Use a prescriptive message for unidiomatic-typecheck

  Closes #3891

• Apply const-naming-style to module constants annotated with
  typing.Final

• The packaging is now done via setuptools exclusively. doc, tests, man, elisp and Changelog are
  not packaged anymore - reducing the size of the package by 75%.

• Debian packaging is now (officially) done in https://salsa.debian.org/python-team/packages/pylint.

• The 'doc' extra-require has been removed.

• __pkginfo__ now only contain __version__ (also accessible with pylint.__version__), other meta-information are still
  accessible with import importlib;metadata.metadata('pylint').

• COPYING has been renamed to LICENSE for standardization.

• Fix false-positive used-before-assignment in function returns.

  Closes #4301

• Updated astroid to 2.5.3

  Closes #2822, #4206, #4284

• Add consider-using-min-max-builtin check for if statement which could be replaced by Python builtin min or max

  Closes #3406

• Don't auto-enable postponed evaluation of type annotations with Python 3.10

• Update astroid to 2.5.4

• Add new extension TypingChecker. This optional checker can detect the use of deprecated typing aliases
  and can suggest the use of the alternative union syntax where possible.
  (For example, 'typing.Dict' can be replaced by 'dict', and 'typing.Unions' by '|', etc.)
  Make sure to check the config options if you plan on using it!

• Reactivates old counts in report mode.

  Closes #3819

• During detection of inconsistent-return-statements consider that assert False is a return node.

  Closes #4019

• Run will not fail if score exactly equals config.fail_under.

• Functions that never returns may declare NoReturn as type hints, so that
  inconsistent-return-statements is not emitted.

  Closes #4122, #4188

• Improved protected access checks to allow access inside class methods

  Closes #1159

• Fix issue with PEP 585 syntax and the use of collections.abc.Set

• Fix issue that caused class variables annotated with typing.ClassVar to be
  identified as class constants. Now, class variables annotated with
  typing.Final are identified as such.

  Closes #4277

• Continuous integration with read the doc has been added.

  Closes #3850

• Don't show DuplicateBasesError for attribute access

• Fix crash when checking setup.cfg for pylint config when there are non-ascii characters in there

  Closes #4328

• Allow code flanked in backticks to be skipped by spellchecker

  Closes #4319

• Allow Python tool directives (for black, flake8, zimports, isort, mypy, bandit, pycharm) at beginning of comments to be skipped by spellchecker

  Closes #4320

• Fix issue that caused emacs pylint to fail when used with tramp

• Improve check for invalid PEP 585 syntax inside functions
  if postponed evaluation of type annotations is enabled

• Improve check for invalid PEP 585 syntax as default function arguments

pylint-2.7.4: Fix disabled warning not ignored (#4268)

• Fix a problem with disabled msgid not being ignored

  Closes #4265

• Fix issue with annotated class constants

  • Closes #4264

pylint-2.7.3

• Introduce logic for checking deprecated attributes in DeprecationMixin.

• Reduce usage of blacklist/whitelist terminology. Notably, extension-pkg-allow-list is an
  alternative to extension-pkg-whitelist and the message blacklisted-name is now emitted as
  disallowed-name. The previous names are accepted to maintain backward compatibility.

• Move deprecated checker to DeprecatedMixin

  Closes #4086

• Bump astroid version to 2.5.2

• Fix false positive for method-hidden when using private attribute and method

  Closes #3936

• use-symbolic-message-instead now also works on legacy messages like C0111 (missing-docstring).

• Remove unwanted print to stdout from _emit_no_member

• Introduce a command-line option to specify pyreverse output directory

  Closes #4159

• Fix issue with Enums and class-attribute-naming-style=snake_case

  Closes #4149

• Add allowed-redefined-builtins option for fine tuning redefined-builtin check.

  Close #3263

• Fix issue when executing with python -m pylint

  Closes #4161

• Exempt typing.TypedDict from too-few-public-methods check.

  Closes #4180

• Fix false-positive no-member for typed annotations without default value.

  Closes #3167

• Add --class-const-naming-style for Enum constants and class variables annotated
  with typing.ClassVar

  Closes #4181

• Fix astroid.Inference error for undefined-variables with ``len()```

  Closes #4215

• Fix column index on FIXME warning messages

  Closes #4218

• Improve handling of assignment expressions, better edge case handling

  Closes #3763, #4238

• Improve check if class is subscriptable PEP585

• Fix documentation and filename handling of --import-graph

• Fix false-positive for unused-import on class keyword arguments

  Closes #3202

• Fix regression with plugins on PYTHONPATH if latter is cwd

  Closes #4252

pylint-2.7.2

• Fix False Positive on Enum.__members__.items(), Enum.__members__.values, and Enum.__members__.keys
  Closes #4123

• Properly strip dangerous sys.path entries (not just the first one)

  Closes #3636

pylint-2.7.1

• Expose UnittestLinter in pylint.testutils

• Don't check directories starting with '.' when using register_plugins

  Closes #4119

pylint-2.7.0

• Introduce DeprecationMixin for reusable deprecation checks.

  Closes #4049

• Fix false positive for builtin-not-iterating when map receives iterable

  Closes #4078

• Python 3.6+ is now required.

• Fix false positive for builtin-not-iterating when zip receives iterable

• Add nan-comparison check for NaN comparisons

• Bug fix for empty-comment message line number.

  Closes #4009

• Only emit bad-reversed-sequence on dictionaries if below py3.8

  Closes #3940

• Handle class decorators applied to function.

  Closes #3882

• Add check for empty comments

• Fix minor documentation issue in contribute.rst

• Enums are now required to be named in UPPER_CASE by invalid-name.

  Close #3834

• Add missing checks for deprecated functions.

• Postponed evaluation of annotations are now recognized by default if python version is above 3.10

  Closes #3992

• Fix column metadata for anomalous backslash lints

• Drop support for Python 3.5

• Add support for pep585 with postponed evaluation

  Closes #3320

• Check alternative union syntax - PEP 604

  Closes #4065

• Fix multiple false positives with assignment expressions

  Closes #3347, #3953, #3865, #3275

• Fix TypedDict inherit-non-class false-positive Python 3.9+

  Closes #1927

• Fix issue with nested PEP 585 syntax

• Fix issue with nested PEP 604 syntax

• Fix a crash in undefined-variable caused by chained attributes in metaclass

  Close #3742

• Fix false positive for not-async-context-manager when contextlib.asynccontextmanager is used

  Close #3862

• Fix linter multiprocessing pool shutdown (triggered warnings when runned in parallels with other pytest plugins)

  Closes #3779

• Fix a false-positive emission of no-self-use and unused-argument for methods
  of generic structural types (Protocol[T])

  Closes #3885

• Fix bug that lead to duplicate messages when using --jobs 2 or more.

  Close #3584

• Adds option check-protected-access-in-special-methods in the ClassChecker to activate/deactivate
  protected-access message emission for single underscore prefixed attribute in special methods.

  Close #3120

• Fix vulnerable regular expressions in pyreverse

  Close #3811

• inconsistent-return-statements message is now emitted if one of try/except statement
  is not returning explicitly while the other do.

  Closes #3468

• Fix useless-super-delegation false positive when default keyword argument is a dictionnary.

  Close #3773

• Fix a crash when a specified config file does not exist

• Add support to ignored-argument-names in DocstringParameterChecker and adds useless-param-doc and useless-type-doc messages.

  Close #3800

• Enforce docparams consistently when docstring is not present

  Close #2738

• Fix duplicate-code false positive when lines only contain whitespace and non-alphanumeric characters (e.g. parentheses, bracket, comman, etc.)

• Improve lint message for singleton-comparison with bools

• Fix spell-checker crash on indented docstring lines that look like # comments

  Close #3786

• Fix AttributeError in checkers/refactoring.py

• Improve sphinx directives spelling filter

• Fix a bug with postponed evaluation when using aliases for annotations.

  Close #3798

• Fix minor documentation issues

• Improve the performance of the line length check.

• Removed incorrect deprecation of inspect.getfullargspec

• Fix signature-differs false positive for functions with variadics

  Close #3737

• Fix a crash in consider-using-enumerate when encountering range() without arguments

  Close #3735

• len-as-conditions is now triggered only for classes that are inheriting directly from list, dict, or set and not implementing the __bool__ function, or from generators like range or list/dict/set comprehension. This should reduce the false positives for other classes, like pandas's DataFrame or numpy's Array.

  Close #1879

• Fixes duplicate-errors not working with -j2+

  Close #3314

• generated-members now matches the qualified name of members

  Close #2498

• Add check for bool function to len-as-condition

• Add simplifiable-condition check for extraneous constants in conditionals using and/or.

• Add condition-evals-to-constant check for conditionals using and/or that evaluate to a constant.

  Close #3407

• Changed setup.py to work with distlib

  Close #3555

• New check: consider-using-generator

  This check warns when a comprehension is used inside an any or all function,
  since it is unnecessary and should be replaced by a generator instead.
  Using a generator would be less code and way faster.

  Close #3165

• Add Github Actions to replace Travis and AppVeyor in the future