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Sync typeshed #21232

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fc2b0d1
Sync typeshed
Apr 15, 2026
46c81f5
Adjust stubs to fix mypy lookup error due to circular dependencies in…
cdce8p Feb 18, 2026
042e0b0
Partially revert Clean up argparse hacks
cdce8p Feb 15, 2025
68047c4
Remove use of LiteralString in builtins (#13743)
hauntsaninja Sep 26, 2022
bbd1965
Revert Remove redundant inheritances from Iterator in builtins
cdce8p Dec 21, 2024
fa4ba51
Revert Use contravariant type variable in Container
cdce8p Feb 23, 2026
3d84558
Revert dict.__or__ typeshed change
ilevkivskyi Apr 7, 2026
533aa6b
Revert sum literal integer change (#13961)
hauntsaninja Oct 29, 2022
8c2b983
Revert typeshed ctypes change
AlexWaygood May 1, 2023
196e129
Temporarily revert contextlib deprecation
hauntsaninja Feb 23, 2026
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Revert Use contravariant type variable in Container
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@cdce8p
cdce8p authored and mypybot committed Apr 15, 2026
commit fa4ba513d0df17781734c240f0ed812957c56df5
9 changes: 3 additions & 6 deletions mypy/typeshed/stdlib/typing.pyi
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Expand Up @@ -640,17 +640,14 @@ class AsyncGenerator(AsyncIterator[_YieldT_co], Protocol[_YieldT_co, _SendT_cont
) -> Coroutine[Any, Any, _YieldT_co]: ...
def aclose(self) -> Coroutine[Any, Any, None]: ...

_ContainerT_contra = TypeVar("_ContainerT_contra", contravariant=True, default=Any)

@runtime_checkable
class Container(Protocol[_ContainerT_contra]):
class Container(Protocol[_T_co]):
# This is generic more on vibes than anything else
@abstractmethod
def __contains__(self, x: _ContainerT_contra, /) -> bool: ...
def __contains__(self, x: object, /) -> bool: ...

@runtime_checkable
class Collection(Iterable[_T_co], Container[Any], Protocol[_T_co]):
# Note: need to use Container[Any] instead of Container[_T_co] to ensure covariance.
class Collection(Iterable[_T_co], Container[_T_co], Protocol[_T_co]):
# Implement Sized (but don't have it as a base class).
@abstractmethod
def __len__(self) -> int: ...
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