pylint-dev/pylint v4.0.7

on GitHub

What's new in Pylint 4.0.7?

Release date: 2026-08-09

False Positives Fixed

• Fix a false positive for invalid-name when a module-level variable is assigned
  an instance of a TypedDict subclass. Such a name is a value, not a type
  definition, so it is now checked against the constant or variable regex instead
  of class-rgx.

  Closes #11231

Other Bug Fixes

• Fix a crash in the bad-open-mode check when the mode argument of
  open is the NotImplemented constant (Python >= 3.14).

  Closes #11099

• Fix a crash in the not-context-manager and not-async-context-manager
  checks when the context manager infers to a value without a name, such as the
  slice returned by with slice(...) / async with slice(...).

  Closes #11102

• Fix a false positive for nested-min-max (W3301) when the inner min/max call carries a keyword argument such as key=. Flattening the call dropped the keyword and changed the result, so nested calls whose inner call has keyword arguments are no longer flagged.

  Closes #11130

• Fix a false suggestion from nested-min-max (W3301): when rewriting a nested min/max into a splat call, arguments positioned after the splatted call were silently dropped, so the suggested code changed the result.

  Closes #11134

• Fix a false positive for too-many-locals (R0914): PEP 695 type parameters, i.e. the T1 and T2 in a generic def f[T1, T2] signature, were counted as local variables. They are type-system constructs, not runtime locals, and are now excluded from the local-variable count.

  Closes #11136

• Fix literal-comparison (R0123) emitting a corrupted suggestion for identifiers
  that contain is (e.g. axis is 5 was rendered ax== == 5). The suggestion
  is now rebuilt from the operands and operator.

  Closes #11146

• Fix false positives in bad-string-format-type (E1307) for valid % formatting:
  %i/%u applied to a float (both truncate like %d) and %a applied to any
  non-int type (%a is type-agnostic like %s/%r).

  Closes #11147

• Fix a false positive for :ref:useless-parent-delegation when an override changes
  the default value of a positional-only parameter.

  Closes #11148

• Fixed a crash in comparison-with-callable when comparing a lambda assigned as a class attribute.

  Closes #11175

• too-many-lines could be reported at the line of a # pylint: disable=too-many-lines
  pragma found in a previously linted module. Pragma positions are now reset between
  modules, so the message is reported at line 1 (or at the current module's own pragma)
  regardless of which files were linted before.

  Refs #11191

• Fix a crash when a call unpacks a dictionary whose keys are not string
  constants, e.g. copy.copy(**{-1: 1}).

  Closes #11222