✨ Feature: 为事件响应器添加更多源码信息 (#2351)

nonebot/utils.py

@@ -21,6 +21,7 @@ from typing import (
     Type,
     Tuple,
     Union,
+    Generic,
     TypeVar,
     Callable,
     Optional,
@@ -220,6 +221,16 @@ def resolve_dot_notation(
     return instance
 
 
+class classproperty(Generic[T]):
+    """类属性装饰器"""
+
+    def __init__(self, func: Callable[[Any], T]) -> None:
+        self.func = func
+
+    def __get__(self, instance: Any, owner: Optional[Type[Any]] = None) -> T:
+        return self.func(type(instance) if owner is None else owner)
+
+
 class DataclassEncoder(json.JSONEncoder):
     """可以序列化 {ref}`nonebot.adapters.Message`(List[Dataclass]) 的 `JSONEncoder`"""