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Revert "lru_cache preserves signature of wrapped function (#6221)" #6356

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Nov 22, 2021
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Revert "lru_cache preserves signature of wrapped function (#6221)" #6356

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17 changes: 8 additions & 9 deletions stdlib/functools.pyi
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Original file line number Diff line number Diff line change
Expand Up @@ -2,7 +2,7 @@ import sys
import types
from _typeshed import SupportsItems, SupportsLessThan
from typing import Any, Callable, Generic, Hashable, Iterable, NamedTuple, Sequence, Sized, Tuple, Type, TypeVar, overload
from typing_extensions import ParamSpec, final
from typing_extensions import final

if sys.version_info >= (3, 9):
from types import GenericAlias
Expand All @@ -11,7 +11,6 @@ _AnyCallable = Callable[..., Any]

_T = TypeVar("_T")
_S = TypeVar("_S")
_P = ParamSpec("_P")

@overload
def reduce(function: Callable[[_T, _S], _T], sequence: Iterable[_S], initial: _T) -> _T: ...
Expand All @@ -25,20 +24,20 @@ class _CacheInfo(NamedTuple):
currsize: int

@final
class _lru_cache_wrapper(Generic[_P, _T]): # type: ignore
__wrapped__: Callable[_P, _T] # type: ignore
def __call__(self, *args: _P.args, **kwargs: _P.kwargs) -> _T: ... # type: ignore
class _lru_cache_wrapper(Generic[_T]):
__wrapped__: Callable[..., _T]
def __call__(self, *args: Hashable, **kwargs: Hashable) -> _T: ...
def cache_info(self) -> _CacheInfo: ...
def cache_clear(self) -> None: ...

if sys.version_info >= (3, 8):
@overload
def lru_cache(maxsize: int | None = ..., typed: bool = ...) -> Callable[[Callable[_P, _T]], _lru_cache_wrapper[_P, _T]]: ... # type: ignore
def lru_cache(maxsize: int | None = ..., typed: bool = ...) -> Callable[[Callable[..., _T]], _lru_cache_wrapper[_T]]: ...
@overload
def lru_cache(maxsize: Callable[_P, _T], typed: bool = ...) -> _lru_cache_wrapper[_P, _T]: ... # type: ignore
def lru_cache(maxsize: Callable[..., _T], typed: bool = ...) -> _lru_cache_wrapper[_T]: ...

else:
def lru_cache(maxsize: int | None = ..., typed: bool = ...) -> Callable[[Callable[_P, _T]], _lru_cache_wrapper[_P, _T]]: ... # type: ignore
def lru_cache(maxsize: int | None = ..., typed: bool = ...) -> Callable[[Callable[..., _T]], _lru_cache_wrapper[_T]]: ...

WRAPPER_ASSIGNMENTS: Sequence[str]
WRAPPER_UPDATES: Sequence[str]
Expand Down Expand Up @@ -118,7 +117,7 @@ if sys.version_info >= (3, 8):
def __class_getitem__(cls, item: Any) -> GenericAlias: ...

if sys.version_info >= (3, 9):
def cache(__user_function: Callable[_P, _T]) -> _lru_cache_wrapper[_P, _T]: ... # type: ignore
def cache(__user_function: Callable[..., _T]) -> _lru_cache_wrapper[_T]: ...

def _make_key(
args: Tuple[Hashable, ...],
Expand Down