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covariant key type for MappingProxyType #13940

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Merged
srittau merged 1 commit into from
Oct 8, 2025
Merged

covariant key type for MappingProxyType #13940

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28 changes: 14 additions & 14 deletions stdlib/types.pyi
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Original file line number Diff line number Diff line change
Expand Up @@ -65,7 +65,7 @@ if sys.version_info >= (3, 13):

_T1 = TypeVar("_T1")
_T2 = TypeVar("_T2")
_KT = TypeVar("_KT")
_KT_co = TypeVar("_KT_co", covariant=True)
_VT_co = TypeVar("_VT_co", covariant=True)

# Make sure this class definition stays roughly in line with `builtins.function`
Expand Down Expand Up @@ -309,27 +309,27 @@ class CodeType:
__replace__ = replace

@final
class MappingProxyType(Mapping[_KT, _VT_co]):
class MappingProxyType(Mapping[_KT_co, _VT_co]): # type: ignore[type-var] # pyright: ignore[reportInvalidTypeArguments]
__hash__: ClassVar[None] # type: ignore[assignment]
def __new__(cls, mapping: SupportsKeysAndGetItem[_KT, _VT_co]) -> Self: ...
def __getitem__(self, key: _KT, /) -> _VT_co: ...
def __iter__(self) -> Iterator[_KT]: ...
def __new__(cls, mapping: SupportsKeysAndGetItem[_KT_co, _VT_co]) -> Self: ...
def __getitem__(self, key: _KT_co, /) -> _VT_co: ... # type: ignore[misc] # pyright: ignore[reportGeneralTypeIssues]
def __iter__(self) -> Iterator[_KT_co]: ...
def __len__(self) -> int: ...
def __eq__(self, value: object, /) -> bool: ...
def copy(self) -> dict[_KT, _VT_co]: ...
def keys(self) -> KeysView[_KT]: ...
def copy(self) -> dict[_KT_co, _VT_co]: ...
def keys(self) -> KeysView[_KT_co]: ...
def values(self) -> ValuesView[_VT_co]: ...
def items(self) -> ItemsView[_KT, _VT_co]: ...
def items(self) -> ItemsView[_KT_co, _VT_co]: ...
@overload
def get(self, key: _KT, /) -> _VT_co | None: ...
def get(self, key: _KT_co, /) -> _VT_co | None: ... # type: ignore[misc] # pyright: ignore[reportGeneralTypeIssues] # Covariant type as parameter
@overload
def get(self, key: _KT, default: _VT_co, /) -> _VT_co: ... # type: ignore[misc] # pyright: ignore[reportGeneralTypeIssues] # Covariant type as parameter
def get(self, key: _KT_co, default: _VT_co, /) -> _VT_co: ... # type: ignore[misc] # pyright: ignore[reportGeneralTypeIssues] # Covariant type as parameter
@overload
def get(self, key: _KT, default: _T2, /) -> _VT_co | _T2: ...
def get(self, key: _KT_co, default: _T2, /) -> _VT_co | _T2: ... # type: ignore[misc] # pyright: ignore[reportGeneralTypeIssues] # Covariant type as parameter
def __class_getitem__(cls, item: Any, /) -> GenericAlias: ...
def __reversed__(self) -> Iterator[_KT]: ...
def __or__(self, value: Mapping[_T1, _T2], /) -> dict[_KT | _T1, _VT_co | _T2]: ...
def __ror__(self, value: Mapping[_T1, _T2], /) -> dict[_KT | _T1, _VT_co | _T2]: ...
def __reversed__(self) -> Iterator[_KT_co]: ...
def __or__(self, value: Mapping[_T1, _T2], /) -> dict[_KT_co | _T1, _VT_co | _T2]: ...
def __ror__(self, value: Mapping[_T1, _T2], /) -> dict[_KT_co | _T1, _VT_co | _T2]: ...

class SimpleNamespace:
__hash__: ClassVar[None] # type: ignore[assignment]
Expand Down
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