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experiment: mark Mapping and Sequence with disjoint_base #16056

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experiment: mark Mapping and Sequence with disjoint_base #16056

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4 changes: 3 additions & 1 deletion stdlib/typing.pyi
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Original file line number Diff line number Diff line change
Expand Up @@ -21,7 +21,7 @@ from types import (
UnionType,
WrapperDescriptorType,
)
from typing_extensions import Never as _Never, deprecated
from typing_extensions import Never as _Never, deprecated, disjoint_base as _disjoint_base

if sys.version_info >= (3, 14):
from _typeshed import EvaluateFunc
Expand Down Expand Up @@ -678,6 +678,7 @@ class Collection(Iterable[_T_co], Container[Any], Protocol[_T_co]):
@abstractmethod
def __len__(self) -> int: ...

@_disjoint_base
class Sequence(Reversible[_T_co], Collection[_T_co]):
@overload
@abstractmethod
Expand Down Expand Up @@ -804,6 +805,7 @@ class ValuesView(MappingView, Collection[_VT_co]):
# but dict and types.MappingProxyType (the vast majority of Mapping types)
# don't allow keyword arguments.

@_disjoint_base
class Mapping(Collection[_KT], Generic[_KT, _VT_co]):
# TODO: We wish the key type could also be covariant, but that doesn't work,
# see discussion in https://github.com/python/typing/pull/273.
Expand Down
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