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mypy incorrectly infers callable signature when assigning async function to class attribute

Status: Open.

#19713 In python/mypy;

· wooparadog opened on Aug 22, 2025

Odd behavior in DEV version of mypy on <code>pandas-stubs</code>

Status: Open.

#19711 In python/mypy;

· Dr-Irv opened on Aug 21, 2025

Type aliases inside dataclass definitions are not supported at runtime inside of if TYPE_CHECKING

bugmypy got something wrongmypy got something wrong

Status: Open.

#19706 In python/mypy;

· eltoder opened on Aug 21, 2025

mypy crashes when passing multiple variadic tuples

crash

topic-type-variables

Status: Open.

#19704 In python/mypy;

· randolf-scholz opened on Aug 21, 2025

MyPy infers descriptors are always ClassVars when testing assignability to protocols

bugmypy got something wrongmypy got something wrong

pendingIssues that may be closedIssues that may be closed

topic-descriptorsProperties, class vs. instance attributesProperties, class vs. instance attributes

topic-protocols

Status: Open.

#19702 In python/mypy;

· dchevell opened on Aug 21, 2025

Remove support for JSON serialization format

feature

performance

Status: Open.

#19697 In python/mypy;

· JukkaL opened on Aug 20, 2025

<code>dataclasses.replace</code> should be able to return differently-parametrized generic dataclasses

feature

Status: Open.

#19694 In python/mypy;

· smheidrich opened on Aug 19, 2025

Implement a check when float-only operations are used

feature

Status: Open.

#19693 In python/mypy;

· karam-assany opened on Aug 19, 2025

Incorrect mapping of actual to formal arguments.

bugmypy got something wrongmypy got something wrong

topic-callsFunction calls, *args, **kwargs, defaultsFunction calls, *args, **kwargs, defaults

Status: Open.

#19692 In python/mypy;

· randolf-scholz opened on Aug 19, 2025

<code>try: except: continue</code> inside <code>for: else:</code> causes spurious used-before-def

bugmypy got something wrongmypy got something wrong

semantic-analyzerProblems that happen during semantic analysisProblems that happen during semantic analysis

Status: Open.

#19690 In python/mypy;

· ambv opened on Aug 19, 2025

stubtest crashes on class decorator in overloaded function

crash

topic-overloads

topic-stubtest

Status: Open.

#19689 In python/mypy;

· brianschubert opened on Aug 19, 2025

mypy incorrectly infers type of ClassVar when accessed in try/except AttributeError

bugmypy got something wrongmypy got something wrong

topic-enum

Status: Open.

#19686 In python/mypy;

· gswifort opened on Aug 19, 2025