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Source commit: python/typeshed@843c1fd
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: pydantic (https://github.com/pydantic/pydantic)
- pydantic/_internal/_model_construction.py:308: error: Incompatible types in assignment (expression has type "Callable[[Any], bool]", base class "ABCMeta" defined the type as "def __instancecheck__(cls, instance: Any) -> bool") [assignment]
- pydantic/_internal/_model_construction.py:309: error: Incompatible types in assignment (expression has type "Callable[[type], bool]", base class "ABCMeta" defined the type as "def __subclasscheck__(cls, subclass: type) -> bool") [assignment]
jax (https://github.com/google/jax)
+ jax/_src/util.py:797: error: Unused "type: ignore" comment [unused-ignore]
+ jax/_src/util.py:798: error: Unused "type: ignore" comment [unused-ignore]
cwltool (https://github.com/common-workflow-language/cwltool)
+ cwltool/update.py: note: In function "v1_2to1_3dev1":
+ cwltool/update.py:55:25: error: Unexpected keyword argument "index" for "pop" of "MutableSequence" [call-arg]
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Sync typeshed
Source commit:
python/typeshed@843c1fd
Note that you will need to close and re-open the PR in order to trigger CI.