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Stop inheriting Sized in collection ABCs (#2658)

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Instead define abstract __len__ in affected classes.

Fixes #2655 without breaking
https://github.com/rominf/ordered-set-stubs/issues/1
This commit is contained in:
Guido van Rossum
2018-11-30 13:10:35 -08:00
committed by GitHub
parent eaeb5fcf13
commit de50614957
2 changed files with 28 additions and 11 deletions
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17
stdlib/3/typing.pyi
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@@ -235,11 +235,18 @@ class Container(Protocol[_T_co]):
if sys.version_info >= (3, 6):
@runtime
class Collection(Sized, Iterable[_T_co], Container[_T_co], Protocol[_T_co]): ...
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: ...
_Collection = Collection
else:
@runtime
class _Collection(Sized, Iterable[_T_co], Container[_T_co], Protocol[_T_co]): ...
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: ...
class Sequence(_Collection[_T_co], Reversible[_T_co], Generic[_T_co]):
@overload
@@ -317,14 +324,14 @@ class MutableSet(AbstractSet[_T], Generic[_T]):
def __ixor__(self, s: AbstractSet[_S]) -> MutableSet[Union[_T, _S]]: ...
def __isub__(self, s: AbstractSet[Any]) -> MutableSet[_T]: ...
class MappingView(Sized):
class MappingView:
def __len__(self) -> int: ...
class ItemsView(AbstractSet[Tuple[_KT_co, _VT_co]], MappingView, Generic[_KT_co, _VT_co]):
class ItemsView(MappingView, AbstractSet[Tuple[_KT_co, _VT_co]], Generic[_KT_co, _VT_co]):
def __contains__(self, o: object) -> bool: ...
def __iter__(self) -> Iterator[Tuple[_KT_co, _VT_co]]: ...
class KeysView(AbstractSet[_KT_co], MappingView, Generic[_KT_co]):
class KeysView(MappingView, AbstractSet[_KT_co], Generic[_KT_co]):
def __contains__(self, o: object) -> bool: ...
def __iter__(self) -> Iterator[_KT_co]: ...