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Cannot combine special types in alternative TypedDict syntax

bugmypy got something wrongmypy got something wrong

crash

topic-typed-dict

Status: Open.

#20401 In python/mypy;

· alicederyn opened on Dec 11, 2025

With a new syntax generic function, <code>T</code> cannot be used to set a default value to a parameter with <code>cast()</code> while <code>T</code> can be used for a parameter and return type

bugmypy got something wrongmypy got something wrong

pendingIssues that may be closedIssues that may be closed

Status: Open.

#20399 In python/mypy;

· hyperkai opened on Dec 11, 2025

[dev] wrong-version version tests disappear completely, but should probably skip instead

bugmypy got something wrongmypy got something wrong

topic-tests

Status: Open.

#20398 In python/mypy;

· wyattscarpenter opened on Dec 11, 2025

mypy does not narrow between Generic type[_T] and Callable[[Any], _T]

bugmypy got something wrongmypy got something wrong

Status: Open.

#20395 In python/mypy;

· aakhavanQC opened on Dec 11, 2025

Defaulted TypeVar cannot be set to Never?

bugmypy got something wrongmypy got something wrong

topic-pep-696TypeVar defaultsTypeVar defaults

Status: Open.

#20391 In python/mypy;

· alicederyn opened on Dec 10, 2025

<code>reveal_type()</code> cannot get <code>*Ts</code> type of the instance of a generic class

bugmypy got something wrongmypy got something wrong

pendingIssues that may be closedIssues that may be closed

Status: Open.

#20388 In python/mypy;

· hyperkai opened on Dec 9, 2025

An empty generic class is covariant even though the doc says "all user-defined generic classes invariant by default"

documentation

Status: Open.

#20366 In python/mypy;

· hyperkai opened on Dec 5, 2025

<code>TypeIs</code> narrowing of union type in a generic is not working

bugmypy got something wrongmypy got something wrong

topic-typeguard-typeisTypeGuard / TypeIs / PEP 647 / PEP 742TypeGuard / TypeIs / PEP 647 / PEP 742

Status: Open.

#20359 In python/mypy;

· mbikovitsky opened on Dec 3, 2025

numpy dtype Statement is unreachable with mypy 1.19.0

bugmypy got something wrongmypy got something wrong

topic-match-statementPython 3.10's match statementPython 3.10's match statement

Status: Open.

#20358 In python/mypy;

· acabal33uab opened on Dec 3, 2025

Incorrect resolution of <code>type[TypeVar]</code> returning <code>TypeVar</code> with <code>numpy</code>

bugmypy got something wrongmypy got something wrong

topic-type-variables

Status: Open.

#20354 In python/mypy;

· Dr-Irv opened on Dec 2, 2025

<code>--disable-error-code=unused-ignore</code> should override <code>enable_error_code = ["unused-ignore"]</code>

bugmypy got something wrongmypy got something wrong

topic-configurationConfiguration files and flagsConfiguration files and flags

topic-error-reportingHow we report errorsHow we report errors

Status: Open.

#20348 In python/mypy;

· bersbersbers opened on Dec 2, 2025

Nondeterministic output when using tuple type vars

bugmypy got something wrongmypy got something wrong

Status: Open.

#20344 In python/mypy;

· Apakottur opened on Dec 1, 2025