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Improved lru_cache which keeps argument types #3880

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Improved lru_cache which keeps argument types #3880

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13 changes: 7 additions & 6 deletions stdlib/3/functools.pyi
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Original file line number Diff line number Diff line change
Expand Up @@ -5,6 +5,7 @@ _AnyCallable = Callable[..., Any]

_T = TypeVar("_T")
_S = TypeVar("_S")
_F = TypeVar("_F", bound=_AnyCallable)

@overload
def reduce(function: Callable[[_T, _S], _T],
Expand All @@ -19,19 +20,19 @@ class _CacheInfo(NamedTuple):
maxsize: int
currsize: int

class _lru_cache_wrapper(Generic[_T]):
__wrapped__: Callable[..., _T]
def __call__(self, *args: Any, **kwargs: Any) -> _T: ...
class _lru_cache_wrapper(Generic[_F]):
__wrapped__: _F
__call__: _F
def cache_info(self) -> _CacheInfo: ...
def cache_clear(self) -> None: ...

if sys.version_info >= (3, 8):
@overload
def lru_cache(maxsize: Optional[int] = ..., typed: bool = ...) -> Callable[[Callable[..., _T]], _lru_cache_wrapper[_T]]: ...
def lru_cache(maxsize: Optional[int] = ..., typed: bool = ...) -> Callable[[_F], _lru_cache_wrapper[_F]]: ...
@overload
def lru_cache(maxsize: Callable[..., _T], typed: bool = ...) -> _lru_cache_wrapper[_T]: ...
def lru_cache(maxsize: _F, typed: bool = ...) -> _lru_cache_wrapper[_F]: ...
else:
def lru_cache(maxsize: Optional[int] = ..., typed: bool = ...) -> Callable[[Callable[..., _T]], _lru_cache_wrapper[_T]]: ...
def lru_cache(maxsize: Optional[int] = ..., typed: bool = ...) -> Callable[[_F], _lru_cache_wrapper[_F]]: ...

WRAPPER_ASSIGNMENTS: Sequence[str]
WRAPPER_UPDATES: Sequence[str]
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