Sync typeshed#21665
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Source commit: python/typeshed@b9090e9
This is allegedly causing large performance problems, see 13821 typeshed/8231 had zero hits on mypy_primer, so it's not the worst thing to undo. Patching this in typeshed also feels weird, since there's a more general soundness issue. If a typevar has a bound or constraint, we might not want to solve it to a Literal. If we can confirm the performance regression or fix the unsoundness within mypy, I might pursue upstreaming this in typeshed. (Reminder: add this to the sync_typeshed script once merged)
The plugin provides superior type checking: #13987 (comment) A manual cherry-pick of e437cdf.
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Diff from mypy_primer, showing the effect of this PR on open source code: strawberry (https://github.com/strawberry-graphql/strawberry)
+ strawberry/types/object_type.py:295: error: Value of type variable "T" of "_inject_default_for_maybe_annotations" cannot be "object" [type-var]
+ strawberry/types/object_type.py:296: error: Value of type variable "T" of "_wrap_dataclass" cannot be "object" [type-var]
hydra-zen (https://github.com/mit-ll-responsible-ai/hydra-zen)
+ src/hydra_zen/third_party/beartype.py:125: error: Cannot assign to a method [method-assign]
scrapy (https://github.com/scrapy/scrapy)
+ scrapy/cmdline.py:70: error: Incompatible types in assignment (expression has type "object", target has type "ScrapyCommand") [assignment]
pandera (https://github.com/pandera-dev/pandera)
+ pandera/dtypes.py:568: error: Unused "type: ignore" comment [unused-ignore]
+ tests/pandas/test_dtypes.py:306: error: Item "object" of "Any | object" has no attribute "foo" [union-attr]
trio (https://github.com/python-trio/trio)
+ src/trio/_core/_tests/test_ki.py:682: error: Argument 1 to "_consume_async_generator" has incompatible type "AsyncGeneratorType[object, Never]"; expected "AsyncGenerator[None, None]" [arg-type]
+ src/trio/_core/_tests/test_ki.py:687: error: Argument 1 to "send" of "GeneratorType" has incompatible type "None"; expected "Never" [arg-type]
pytest (https://github.com/pytest-dev/pytest)
+ testing/test_monkeypatch.py:439: error: Statement is unreachable [unreachable]
graphql-core (https://github.com/graphql-python/graphql-core)
+ tests/execution/test_middleware.py:265: error: "object" has no attribute "data" [attr-defined]
+ tests/execution/test_middleware.py:267: error: "object" has no attribute "data" [attr-defined]
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Sync typeshed
Source commit:
python/typeshed@b9090e9
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