31 lines
780 B
Python
31 lines
780 B
Python
"""Utility functions for constants."""
|
|
|
|
from collections.abc import Callable
|
|
from typing import Any, Generic, TypeVar
|
|
|
|
T = TypeVar("T")
|
|
V = TypeVar("V")
|
|
|
|
|
|
class classproperty(Generic[T, V]):
|
|
"""A class property decorator."""
|
|
|
|
def __init__(self, getter: Callable[[type[T]], V]) -> None:
|
|
"""Initialize the class property.
|
|
|
|
Args:
|
|
getter: The getter function.
|
|
"""
|
|
self.getter = getattr(getter, "__func__", getter)
|
|
|
|
def __get__(self, instance: Any, owner: type[T]) -> V:
|
|
"""Get the value of the class property.
|
|
|
|
Args:
|
|
instance: The instance of the class.
|
|
owner: The class itself.
|
|
|
|
Returns:
|
|
The value of the class property.
|
|
"""
|
|
return self.getter(owner)
|