v3.3.3

What's new in Pylint 3.3.3?

Release date: 2024-12-23

False Positives Fixed

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

  Closes #9335

• Fix a false positive for use-implicit-booleaness-not-len. No lint should be emitted for
  generators (len is not defined for generators).

  Refs #10100

Other Bug Fixes

• Fix Unable to import 'collections.abc' (import-error) on Python 3.13.1.

  Closes #10112

v3.3.2

False Positives Fixed

• Fix a false positive for potential-index-error when an indexed iterable
  contains a starred element that evaluates to more than one item.

  Closes #10076

Other Bug Fixes

• Fixes the issue with --source-root option not working when the source files are in a subdirectory of the source root (e.g. when using a /src layout).

  Closes #10026

v3.3.1

What's new in Pylint 3.3.1?

Release date: 2024-09-24

False Positives Fixed

• Fix regression causing some f-strings to not be inferred as strings.

  Closes #9947

v3.3.0

Release date: 2024-09-20

Changes requiring user actions

• We migrated symilar to argparse, from getopt, so the error and help output changed
  (for the better). We exit with 2 instead of sometime 1, sometime 2. The error output
  is not captured by the runner anymore. It's not possible to use a value for the
  boolean options anymore (--ignore-comments 1 should become --ignore-comments).

  Refs #9731

New Features

• Add new declare-non-slot error which reports when a class has a __slots__ member and a type hint on the class is not present in __slots__.

  Refs #9499

New Checks

• Added too-many-positional-arguments to allow distinguishing the configuration for too many
  total arguments (with keyword-only params specified after *) from the configuration
  for too many positional-or-keyword or positional-only arguments.

  As part of evaluating whether this check makes sense for your project, ensure you
  adjust the value of --max-positional-arguments.

  Closes #9099

• Add using-exception-groups-in-unsupported-version and
  using-generic-type-syntax-in-unsupported-version for uses of Python 3.11+ or
  3.12+ features on lower supported versions provided with --py-version.

  Closes #9791

• Add using-assignment-expression-in-unsupported-version for uses of := (walrus operator)
  on Python versions below 3.8 provided with --py-version.

  Closes #9820

• Add using-positional-only-args-in-unsupported-version for uses of positional-only args on
  Python versions below 3.8 provided with --py-version.

  Closes #9823

• Add unnecessary-default-type-args to the typing extension to detect the use
  of unnecessary default type args for typing.Generator and typing.AsyncGenerator.

  Refs #9938

False Negatives Fixed

• Fix computation of never-returning function: Never is handled in addition to NoReturn, and priority is given to the explicit --never-returning-functions option.

  Closes #7565.

• Fix a false negative for await-outside-async when await is inside Lambda.

  Refs #9653

• Fix a false negative for duplicate-argument-name by including positional-only, *args and **kwargs arguments in the check.

  Closes #9669

• Fix false negative for multiple-statements when multiple statements are present on else and finally lines of try.

  Refs #9759

• Fix false negatives when isinstance does not have exactly two arguments.
  pylint now emits a too-many-function-args or no-value-for-parameter
  appropriately for isinstance calls.

  Closes #9847

Other Bug Fixes

• --enable with --disable=all now produces an error, when an unknown msg code is used. Internal pylint messages are no longer affected by --disable=all.

  Closes #9403

• Impossible to compile regexes for paths in the configuration or argument given to pylint won't crash anymore but
  raise an argparse error and display the error message from re.compile instead.

  Closes #9680

• Fix a bug where a tox.ini file with pylint configuration was ignored and it exists in the current directory.

  .cfg and .ini files containing a Pylint configuration may now use a section named [pylint]. This enhancement impacts the scenario where these file types are used as defaults when they are present and have not been explicitly referred to, using the --rcfile option.

  Closes #9727

• Improve file discovery for directories that are not python packages.

  Closes #9764

Other Changes

• Remove support for launching pylint with Python 3.8.
  Code that supports Python 3.8 can still be linted with the --py-version=3.8 setting.

  Refs #9774

• Add support for Python 3.13.

  Refs #9852

Internal Changes

• All variables, classes, functions and file names containing the word 'similar', when it was,
  in fact, referring to 'symilar' (the standalone program for the duplicate-code check) were renamed
  to 'symilar'.

  Closes #9734

• Remove old-style classes (Python 2) code and remove check for new-style class since everything is new-style in Python 3. Updated doc for exception checker to remove reference to new style class.

  Refs #9925

v3.2.7

What's new in Pylint 3.2.7?

Release date: 2024-08-31

False Positives Fixed

• Fixed a false positive unreachable for NoReturn coroutine functions.

  Closes #9840

Other Bug Fixes

• Fix crash in refactoring checker when calling a lambda bound as a method.

  Closes #9865

• Fix a crash in undefined-loop-variable when providing the iterable argument to enumerate().

  Closes #9875

• Fix to address indeterminacy of error message in case a module name is same as another in a separate namespace.

  Refs #9883

v3.2.6

What's new in Pylint 3.2.6?

Release date: 2024-07-21

False Positives Fixed

• Quiet false positives for unexpected-keyword-arg when pylint cannot
  determine which of two or more dynamically defined classes is being instantiated.

  Closes #9672

• Fix a false positive for missing-param-doc where a method which is decorated with typing.overload was expected to have a docstring specifying its parameters.

  Closes #9739

• Fix a regression that raised invalid-name on class attributes merely
  overriding invalid names from an ancestor.

  Closes #9765

• Treat assert_never() the same way when imported from typing_extensions.

  Closes #9780

• Fix a false positive for consider-using-min-max-builtin when the assignment target is an attribute.

  Refs #9800

Other Bug Fixes

• Fix an AssertionError arising from properties that return partial functions.

  Closes #9214

• Fix a crash when a subclass extends __slots__.

  Closes #9814

v3.2.5

What's new in Pylint 3.2.5 ?

Release date: 2024-06-28

Other Bug Fixes

• Fixed a false positive unreachable-code when using typing.Any as return type in python
  3.8, the typing.NoReturn are not taken into account anymore for python 3.8 however.

  Closes #9751

v3.2.4

What's new in Pylint 3.2.4?

Release date: 2024-06-26

False Positives Fixed

• Prevent emitting possibly-used-before-assignment when relying on names
  only potentially not defined in conditional blocks guarded by functions
  annotated with typing.Never or typing.NoReturn.

  Closes #9674

Other Bug Fixes

• Fixed a crash when the lineno of a variable used as an annotation wasn't available for undefined-variable.

  Closes #8866

• Fixed a crash when the start value in an enumerate was non-constant and impossible to infer
  (like inenumerate(apples, start=int(random_apple_index)) for unnecessary-list-index-lookup.

  Closes #9078

• Fixed a crash in symilar when the -d or -i short option were not properly recognized.
  It's still impossible to do -d=1 (you must do -d 1).

  Closes #9343

v3.2.3

False Positives Fixed

• Classes with only an Ellipsis (...) in their body do not trigger 'multiple-statements'
  anymore if they are inlined (in accordance with black's 2024 style).

  Closes #9398

• Fix a false positive for redefined-outer-name when there is a name defined in an exception-handling block which shares the same name as a local variable that has been defined in a function body.

  Closes #9671

• Fix a false positive for use-yield-from when using the return value from the yield atom.

  Closes #9696

v3.2.2

What's new in Pylint 3.2.2?

Release date: 2024-05-20

False Positives Fixed

• Fix multiple false positives for generic class syntax added in Python 3.12 (PEP 695).

  Closes #9406

• Exclude context manager without cleanup from
  contextmanager-generator-missing-cleanup checks.

  Closes #9625