Issues

• Assertion failure crash with shadowed functools module: assert isinstance(singledispatch_obj, Instance)

  crashpriority-2-low
  python/mypy#20339 · Filter by author correctmost opened on Dec 1, 2025
  1

• (🐞) --update-data removes escapes

  bugpriority-2-lowtopic-tests
  python/mypy#17465 · Filter by author KotlinIsland opened on Jul 2, 2024
  2

• Direction of comparison operator in error message does not depend on direction in code

  bugpriority-2-low
  python/mypy#17460 · Filter by author jevandezande opened on Jul 1, 2024

• Request: opt-in rule preventing duplicate error codes

  featurepriority-2-lowtopic-type-ignore
  python/mypy#16885 · Filter by author jamesbraza opened on Feb 6, 2024

• no error when subtyping string literal

  bugpriority-2-lowtopic-runtime-semantics
  python/mypy#16195 · Filter by author DetachHead opened on Sep 28, 2023

• More principled solution for universal quantificatoin of non-Callable types

  featurepriority-2-lowtopic-paramspectopic-type-variables
  python/mypy#15909 · Filter by author ilevkivskyi opened on Aug 18, 2023

• Support __call__ on metaclasses

  bugpriority-2-lowtopic-protocols
  python/mypy#14122 · Filter by author ilevkivskyi opened on Nov 17, 2022

• (🎁) Narrow type based on method return type of union

  featurepriority-2-lowtopic-type-narrowing
  python/mypy#13530 · Filter by author KotlinIsland opened on Aug 27, 2022

• (🎁) No warning about TypeAlias to bare TypeVar when using TypeAlias

  featurepriority-2-lowtopic-runtime-semanticstopic-type-aliastopic-type-variables
  python/mypy#13376 · Filter by author KotlinIsland opened on Aug 11, 2022
  4

• (🐞) Variable in dataclass body has value of type Field when mypy thinks it's int (or whatever)

  bugpriority-2-lowtopic-dataclasses
  python/mypy#13180 · Filter by author KotlinIsland opened on Jul 19, 2022

• no error when using field outside of a dataclass

  featurepriority-2-lowtopic-dataclasses
  python/mypy#13120 · Filter by author DetachHead opened on Jul 14, 2022
  2

• no error when setting init=False on Final field in dataclass

  featuregood-second-issuepriority-2-lowtopic-dataclassestopic-final
  python/mypy#13119 · Filter by author DetachHead opened on Jul 14, 2022
  10

• no warning when dataclass extends non-dataclass with an __init__ method

  bugpriority-2-lowtopic-dataclassestopic-runtime-semantics
  python/mypy#13051 · Filter by author DetachHead opened on Jul 1, 2022
  1

• mypy does not recognize sys.platform with ternary operator

  featurepriority-2-lowtopic-ternary-expression
  python/mypy#13003 · Filter by author amatyukhin0 opened on Jun 21, 2022
  2

• mypy does not recognize os.name

  featurepriority-2-low
  python/mypy#13002 · Filter by author amatyukhin0 opened on Jun 21, 2022
  1

• no error when method has a keyword argument but no positional arguments

  bugpriority-2-lowtopic-runtime-semantics
  python/mypy#12893 · Filter by author DetachHead opened on May 28, 2022

• Wrong verbosity level when specified in both config file and command line.

  bugpriority-2-lowtopic-configuration
  python/mypy#12485 · Filter by author mrolle45 opened on Mar 29, 2022
  3

• Dict's .get() method doesn't limit possible types of the given element

  featurepriority-2-lowtopic-type-narrowing
  python/mypy#12457 · Filter by author mcAnswer opened on Mar 26, 2022
  4

• (🎁) Allow if expression / conditional base in class def

  featurepriority-2-lowsemantic-analyzertopic-ternary-expression
  python/mypy#12445 · Filter by author KotlinIsland opened on Mar 25, 2022
  5

• (🎁) Special case NoReturn, Never, Self and TypeAlias to not be subscriptable

  featurepriority-2-low
  python/mypy#12375 · Filter by author KotlinIsland opened on Mar 18, 2022

• (🐞) No error when empty tuple used as type parameter

  bugpriority-2-low
  python/mypy#12316 · Filter by author KotlinIsland opened on Mar 9, 2022
  1

• (🐞) An error should be reported when reveal_type is used but not called

  featurepriority-2-lowtopic-reveal-type
  python/mypy#12285 · Filter by author KotlinIsland opened on Mar 4, 2022
  5

• (🐞) Check __setitem__ and __getitem__ for TypedDicts

  featurepriority-2-lowtopic-typed-dict
  python/mypy#12270 · Filter by author KotlinIsland opened on Mar 2, 2022
  1

• Recognise the @object.__new__ decorator on a class definition

  featurepriority-2-low
  python/mypy#12265 · Filter by author DanielNoord opened on Mar 1, 2022

• Only allow splatting iterables if function takes at least one positional arg

  featurepriority-2-lowtopic-calls
  python/mypy#12206 · Filter by author piotrfilipiuk opened on Feb 18, 2022
  2