pylint-dev/pylint v2.17.0

2.17.0

on GitHub

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