What's New in Pylint 3.2

Release:

3.2

Date:

TBA

Summary -- Release highlights

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. (#9840)

Other Bug Fixes

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

  Closes #9865 (#9865)

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

  Closes #9875 (#9875)

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

  Refs #9883 (#9883)

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 (#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 (#9739)

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

  Closes #9765 (#9765)

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

  Closes #9780 (#9780)

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

  Refs #9800 (#9800)

Other Bug Fixes

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

  Closes #9214 (#9214)

• Fix a crash when a subclass extends __slots__.

  Closes #9814 (#9814)

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 (#9751)

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 (#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 (#8866)

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

  Closes #9078 (#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 (#9343)

What's new in Pylint 3.2.3?

Release date: 2024-06-06

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 (#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 (#9671)

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

  Closes #9696 (#9696)

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 (#9406)

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

  Closes #9625 (#9625)

What's new in Pylint 3.2.1?

Release date: 2024-05-18

False Positives Fixed

• Exclude if/else branches containing terminating functions (e.g. sys.exit()) from possibly-used-before-assignment checks.

  Closes #9627 (#9627)

• Don't emit typevar-name-incorrect-variance warnings for PEP 695 style TypeVars. The variance is inferred automatically by the type checker. Adding _co or _contra suffix can help to reason about TypeVar.

  Refs #9638 (#9638)

• Fix a false positive for possibly-used-before-assignment when using typing.assert_never() (3.11+) to indicate exhaustiveness.

  Closes #9643 (#9643)

Other Bug Fixes

• Fix a false negative for --ignore-patterns when the directory to be linted is specified using a dot(.) and all files are ignored instead of only the files whose name begin with a dot.

  Closes #9273 (#9273)

• Restore "errors / warnings by module" section to report output (with -ry).

  Closes #9145 (#9145)

• trailing-comma-tuple should now be correctly emitted when it was disabled globally but enabled via local message control, after removal of an over-optimisation.

  Refs #9608. (#9608)

• Add --prefer-stubs=yes option to opt-in to the astroid 3.2 feature that prefers .pyi stubs over same-named .py files. This has the potential to reduce no-member errors but at the cost of more errors such as not-an-iterable from function bodies appearing as ....

  Defaults to no.

  Closes #9626 Closes #9623 (#9626)

Internal Changes

• Update astroid version to 3.2.1. This solves some reports of RecursionError and also makes the prefer .pyi stubs feature in astroid 3.2.0 opt-in with the aforementioned --prefer-stubs=y option.

  Refs #9139 (#9139)

What's new in Pylint 3.2.0?

Release date: 2024-05-14

New Features

• Understand six.PY2 and six.PY3 for conditional imports.

  Closes #3501 (#3501)

• A new github reporter has been added. This reporter returns the output of pylint in a format that Github can use to automatically annotate code. Use it with pylint --output-format=github on your Github Workflows.

  Closes #9443. (#9443)

New Checks

• Add check possibly-used-before-assignment when relying on names after an if/else switch when one branch failed to define the name, raise, or return.

  Closes #1727 (#1727)

• Checks for generators that use contextmanagers that don't handle cleanup properly. Is meant to raise visibility on the case that a generator is not fully exhausted and the contextmanager is not cleaned up properly. A contextmanager must yield a non-constant value and not handle cleanup for GeneratorExit. The using generator must attempt to use the yielded context value with x() as y and not just with x().

  Closes #2832 (#2832)

False Negatives Fixed

• If and Try nodes are now checked for useless return statements as well.

  Closes #9449. (#9449)

• Fix false negative for property-with-parameters in the case of parameters which are positional-only, keyword-only, variadic positional or variadic keyword.

  Closes #9584 (#9584)

False Positives Fixed

pylint now understands the @overload decorator return values better.

Closes #4696 (#4696) Refs #9606 (#9606)

Performance Improvements

• Ignored modules are now not checked at all, instead of being checked and then ignored. This should speed up the analysis of large codebases which have ignored modules.

  Closes #9442 (#9442) (#9442)

• ImportChecker's logic has been modified to avoid context files when possible. This makes it possible to cache module searches on astroid and reduce execution times.

  Refs #9310. (#9310)

• An internal check for trailing-comma-tuple being enabled for a file or not is now done once per file instead of once for each token.

  Refs #9608. (#9608)