pylint 4.1.3

v4.1.3

on Python PyPI

What's new in Pylint 4.1.3?

Release date: 2026-10-11

False Positives Fixed

• Fixed a false positive for attribute-defined-outside-init when an
  attribute is assigned inside the setter of an old-style, non-decorator
  property(fget, fset) call. The decorator form (@property /
  @x.setter) was already exempted by the fix for #409; the classic
  call form was not.

  Closes #3325

• Fix a false positive for used-before-assignment when a name bound by an earlier
  target of the same assignment is used by a later target, as in a = b[a] = 0.

  Closes #5955

• Fix a no-member false positive in a comprehension inside a branch that
  cannot run, such as if sys.platform == "win32": on Linux. Like the rest of
  the branch, the comprehension is no longer checked for missing members.

  Closes #7240

• Fix a false positive for used-before-assignment when a name bound by a tuple
  or list target of a with item is used by a later item of the same with statement.

  Closes #7545

• Fix false positives such as not-callable, not-an-iterable,
  unpacking-non-sequence and no-member on the result of a function whose
  body is only ..., like @overload and .pyi stubs. Such calls were
  inferred as returning None. This affected sqlalchemy.func,
  pydantic.Field, and the torch functions wrapped by _add_docstr,
  such as torch.linalg.qr.

  Closes #8138
  Closes #9218
  Closes #9354
  Closes #10087

• Fix a false positive for protected-access when a subclass of a subscripted
  generic base, such as class Child(Parent[T]), accesses a protected member
  through that base, such as Parent._foo(self).

  Closes #8600

• Avoid emitting unreachable for a yield immediately after raise or
  sys.exit() that marks a function as a generator, matching the existing
  handling of return.

  Closes #8909

• Fix a false positive for super-init-not-called in .pyi stub files, where
  every __init__ body is ... and cannot call the parent's __init__.

  Closes #9096

• Fix a false positive for possibly-used-before-assignment when a lambda
  uses its parameters, including from a nested lambda, and that name is assigned
  later in the module.

  Closes #9126

• Fix a false positive for useless-parent-delegation when a keyword-only
  parameter is passed to the parent under the same keyword but with a different value.

  Closes #9226

• Fix a false positive for unused-argument in .pyi stub files, where
  function bodies are ... and cannot use their arguments.

  Closes #9417

• Fix a false positive for used-before-assignment when a name assigned with an
  assignment expression in the condition of a comprehension is used in its element,
  for example [y for x in data if (y := f(x))].

  Closes #9460

• Fixed false positive arguments-differ and signature-differs for
  typing.overload stubs. Overload stubs in a subclass are no longer compared
  to the overridden method, and an overridden method with overloads is compared
  through its implementation instead of its first stub.

  Closes #10186
  Closes #5264

• Stop emitting redefined-variable-type when the bare _ variable is
  reused to discard values of different types.

  Closes #10374

• Allow the __main__ module name in the camelCase, PascalCase and
  UPPER_CASE naming styles without reporting invalid-name.

  Closes #10442

• Fixed a false positive for unexpected-keyword-arg when a decorator that
  returns its argument unchanged is stacked above a decorator accepting **kwargs.

  Closes #10831

• Fix invalid-name false positives for module-level all-caps aliases that
  preserve the name of an external callable.

  Closes #11012

• redefined-builtin no longer warns for method parameters that retain a
  built-in name from an overridden method.

  Closes #11438

• Fixed a false positive for useless-suppression of line-too-long when a # inside a string literal comes before the # pylint: disable=line-too-long comment.

  Closes #11440

• Fix a false positive for unnecessary-ellipsis when an ellipsis is the
  sole body statement of a Protocol method defined inside a conditional block
  such as if TYPE_CHECKING:.

  Closes #11459

• Fix a false positive for unnecessary-negation when negating a comparison
  between instances of a set or frozenset subclass.

  Refs #11513

Other Bug Fixes

• Fix pyreverse hanging or crashing with a RecursionError when
  --all-associated (-S) follows an attribute whose inferred class is rebuilt by
  astroid on every inference, such as a numpy array.

  Closes #3602

• Fix a crash in pyreverse when a diagram includes a class created by
  namedtuple, or an argparse.Namespace.

  Closes #10767

• The "difference" column of the "Messages by category" and "Duplication" reports
  (--reports=y) now shows the change since the previous run instead of repeating
  the previous count.

  Closes #11520

• Fixed nested-min-max suggesting a non-equivalent rewrite when an inner
  min/max call had multiple arguments.

  Refs #11593

• Using several output formats that all write to stdout (for example --output-format=colorized,no-header)
  now raises an error instead of printing every message more than once.

  Closes #11597

• Fixed an IndexError crash in the typecheck checker when an Enum class defines an __init__ method without arguments.

  Closes #11608

• Fix a crash in the duplicate-code checker when min-similarity-lines is set to 0.
  The checker is now disabled in that case, as documented.

  Closes #11625