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from __future__ import annotations
from typing import (
Any,
Callable,
Generic,
Optional,
Type,
TypeVar,
)
from typing_extensions import (
Concatenate,
ParamSpec,
Self,
)
SelfT = TypeVar("SelfT")
P = ParamSpec("P")
HybridT = TypeVar("HybridT", covariant=True)
class hybridmethod(Generic[SelfT, P, HybridT]):
def __init__(
self,
func: Callable[
Concatenate[type[SelfT], P], HybridT
], # Must be the classmethod version
):
self.cls_func = func
self.__doc__ = func.__doc__
def instancemethod(self, func: Callable[Concatenate[SelfT, P], HybridT]) -> Self:
self.instance_func = func
return self
def __get__(
self, instance: Optional[SelfT], owner: Type[SelfT]
) -> Callable[P, HybridT]:
if instance is None or self.instance_func is None:
# either bound to the class, or no instance method available
return self.cls_func.__get__(owner, None)
return self.instance_func.__get__(instance, owner)
T_co = TypeVar("T_co")
TT_co = TypeVar("TT_co", bound="type[Any]")
class classproperty(Generic[TT_co, T_co]):
def __init__(self, func: Callable[[TT_co], T_co]):
self.__func__ = func
def __get__(self, instance: Any, type: TT_co) -> T_co:
return self.__func__(type)
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