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<code>mypy</code> nightly crashes with <code>ModuleNotFoundError: No module named 'native_internal'</code>

crash

Status: Open.

#20006 In python/mypy;

· cmp0xff opened on Oct 4, 2025

False positive when using ternary statement

bugmypy got something wrongmypy got something wrong

topic-type-contextType context / bidirectional inferenceType context / bidirectional inference

Status: Open.

#19998 In python/mypy;

· ngnpope opened on Oct 3, 2025

INTERNAL ERROR with allow_redefinition_new and undeclared instance variables

crash

topic-inferenceWhen to infer types or require explicit annotationsWhen to infer types or require explicit annotations

Status: Open.

#19996 In python/mypy;

· bernikr opened on Oct 3, 2025

Incorrect "Alternative patterns bind different names" with mapping capture statements

bugmypy got something wrongmypy got something wrong

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

topic-reachabilityDetecting unreachable codeDetecting unreachable code

Status: Open.

#19995 In python/mypy;

· A5rocks opened on Oct 3, 2025

Infer <code>Final</code> from all-caps-named variables

feature

needs discussion

Status: Open.

#19987 In python/mypy;

· m-aciek opened on Oct 2, 2025

Unreachable false positive in match statement with tuples

bugmypy got something wrongmypy got something wrong

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

topic-reachabilityDetecting unreachable codeDetecting unreachable code

Status: Open.

#19981 In python/mypy;

· brandonchinn178 opened on Oct 2, 2025

1.19 Release Planning

metaIssues tracking a broad area of workIssues tracking a broad area of work

Status: Open.

#19964 In python/mypy;

· ilevkivskyi opened on Oct 1, 2025

incorrect inferred type accessing typed dict with static keys

bugmypy got something wrongmypy got something wrong

topic-inferenceWhen to infer types or require explicit annotationsWhen to infer types or require explicit annotations

topic-literal-types

topic-typed-dict

Status: Open.

#19961 In python/mypy;

· yabirgb opened on Oct 1, 2025

runtests.py lint fails in shellcheck, at least on windows

bugmypy got something wrongmypy got something wrong

topic-developerIssues relevant to mypy developersIssues relevant to mypy developers

Status: Open.

#19958 In python/mypy;

· wyattscarpenter opened on Sep 30, 2025

Certain tests can't deal with symlinks on Windows

bugmypy got something wrongmypy got something wrong

Status: Open.

#19956 In python/mypy;

· wyattscarpenter opened on Sep 30, 2025

<code>--update-data</code> introduces new blank lines when aligning multi-line expected info comments

bugmypy got something wrongmypy got something wrong

topic-developerIssues relevant to mypy developersIssues relevant to mypy developers

topic-tests

Status: Open.

#19940 In python/mypy;

· wyattscarpenter opened on Sep 27, 2025

Match statement syntax error does not obey version guards

Status: Open.

#19923 In python/mypy;

· wyattscarpenter opened on Sep 24, 2025