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Add functools.cached_property #3439

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Merged
JelleZijlstra merged 2 commits into from
Nov 6, 2019
Merged

Add functools.cached_property #3439

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b28b5f0
Add functools.cached_property
srittau Nov 5, 2019
47a804e
Make owner types more strict
srittau Nov 6, 2019
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11 changes: 11 additions & 0 deletions stdlib/3/functools.pyi
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Original file line number Diff line number Diff line change
Expand Up @@ -76,3 +76,14 @@ class _SingleDispatchCallable(Generic[_T]):
def __call__(self, *args: Any, **kwargs: Any) -> _T: ...

def singledispatch(func: Callable[..., _T]) -> _SingleDispatchCallable[_T]: ...

if sys.version_info >= (3, 8):
class cached_property(Generic[_S, _T]):
func: Callable[[_S], _T]
attrname: Optional[str]
def __init__(self, func: Callable[[_S], _T]) -> None: ...
@overload
def __get__(self, instance: None, owner: Optional[Type[_S]] = ...) -> cached_property[_S, _T]: ...
@overload
def __get__(self, instance: _S, owner: Optional[Type[_S]] = ...) -> _T: ...
def __set_name__(self, owner: Type[_S], name: str) -> None: ...