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Relax typing on cached_property to accept subclasses (#95407)

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J. Nick Koston 2023-07-23 20:47:29 -05:00 committed by GitHub
parent 235b98da8a
commit 19b0a6e7f6
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1 changed files with 10 additions and 9 deletions
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19
homeassistant/backports/functools.py
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@ -6,22 +6,21 @@ from types import GenericAlias
from typing import Any, Generic, Self, TypeVar, overload
_T = TypeVar("_T")
_R = TypeVar("_R")
class cached_property(Generic[_T, _R]): # pylint: disable=invalid-name
class cached_property(Generic[_T]): # pylint: disable=invalid-name
"""Backport of Python 3.12's cached_property.
Includes https://github.com/python/cpython/pull/101890/files
"""
def __init__(self, func: Callable[[_T], _R]) -> None:
def __init__(self, func: Callable[[Any], _T]) -> None:
"""Initialize."""
self.func = func
self.attrname: Any = None
self.func: Callable[[Any], _T] = func
self.attrname: str | None = None
self.__doc__ = func.__doc__
def __set_name__(self, owner: type[_T], name: str) -> None:
def __set_name__(self, owner: type[Any], name: str) -> None:
"""Set name."""
if self.attrname is None:
self.attrname = name
@ -32,14 +31,16 @@ class cached_property(Generic[_T, _R]): # pylint: disable=invalid-name
)
@overload
def __get__(self, instance: None, owner: type[_T]) -> Self:
def __get__(self, instance: None, owner: type[Any] | None = None) -> Self:
...
@overload
def __get__(self, instance: _T, owner: type[_T]) -> _R:
def __get__(self, instance: Any, owner: type[Any] | None = None) -> _T:
...
def __get__(self, instance: _T | None, owner: type[_T] | None = None) -> _R | Self:
def __get__(
self, instance: Any | None, owner: type[Any] | None = None
) -> _T | Self:
"""Get."""
if instance is None:
return self