Pull Requests python/mypy

Fix crash in new-style type alias with variadic unpack

#21551 by ilevkivskyi was merged 2026-05-28 01:02

[mypyc] Preserve inherited attribute defaults under separate=True

#21547 by georgesittas was merged 2026-06-03 16:32

Fix false positive for constrained NamedTuple self types

#21546 by BHUVANSH855 was closed 2026-06-04 23:43

Correctly handle empty tuple index when unpacked

#21545 by ilevkivskyi was merged 2026-05-27 00:00

Fix various bugs in TypeVarTuples with defaults

#21544 by ilevkivskyi was merged 2026-05-28 15:39

Add Python version checks to native parser

#21539 by KevinRK29 was merged 2026-06-04 12:49

Support protocol checks for self-types in tuple types

#21535 by ilevkivskyi was merged 2026-05-22 11:20

Report func-returns-value for decorated methods

#21534 by jbbqqf was closed 2026-06-04 23:49

[mypyc] Fix non-deterministic class struct layout under `separate=True`

#21530 by VaggelisD was merged 2026-05-21 15:59

Fix false positive for NamedTuple subtype of TupleType

#21529 by JiwaniZakir was closed 2026-05-21 21:26

Fix type variable defaults depending on previous variables

#21526 by ilevkivskyi was merged 2026-05-21 16:55

[mypyc] Add test for incremental builtin_base class construction across groups

#21524 by georgesittas was merged 2026-05-22 09:54

Report incompatible ast-serialize versions clearly pending

#21523 by sjh9714 was closed 2026-06-04 23:50

[mypyc] Add `librt.strings.isidentifier` codepoint primitive

#21522 by VaggelisD was merged 2026-05-26 16:36

[mypyc] Add `librt.strings.isalpha` codepoint primitive

#21521 by VaggelisD was merged 2026-05-20 11:25

Fix edge cases in variadic tuple subclasses

#21518 by ilevkivskyi was merged 2026-05-20 09:55

Avoid eager file read in State.parse_file() when using native parser

#21516 by JiwaniZakir was closed 2026-05-20 00:33

Fix value-in-container narrowing regression

#21513 by JiwaniZakir was closed 2026-06-04 23:51

Fix false positive "Expected TypedDict key to be string literal" for Union[TypedDict, dict[K, V]]

#21511 by JiwaniZakir was merged 2026-05-19 21:22

[mypyc] Add `librt.strings.isalnum` codepoint primitive

#21509 by VaggelisD was merged 2026-05-19 13:52

Sync typeshed

#21507 by cdce8p was merged 2026-06-09 14:13

Fix descriptor access for complex generics

#21506 by JiwaniZakir was closed 2026-05-20 00:35

[mypyc] Add `librt.strings.isdigit` codepoint primitive

#21504 by VaggelisD was merged 2026-05-18 18:14

Fix crash for empty Annotated type application

#21503 by cyphercodes was merged 2026-05-20 00:47

Special-case constructor for tuple types

#21502 by ilevkivskyi was merged 2026-05-19 21:47

Bump ast-serialize to 0.5.0

#21501 by ilevkivskyi was merged 2026-05-17 18:23

Use explicit Never for type inference

#21497 by ilevkivskyi was merged 2026-05-18 23:00

[mypyc] Document free threading and other doc updates

#21494 by JukkaL was merged 2026-05-16 21:37

Fix various crashes on recursive type variable defaults

#21491 by ilevkivskyi was merged 2026-05-26 12:11

[mypyc] Fix missing cross-group header deps in incremental builds

#21490 by georgesittas was merged 2026-05-20 16:49