有没有办法截获来自类的Dict键的设置？

class Descriptor:
    def __init__(self):
        self._value = None

    def __get__(self, instance, owner):
        print(f'Getting value: {self._value}')
        return self._value

    def __set__(self, instance, value):
        print(f'Setting value: {value}')
        self._value = value

class MyClass:
    attr = Descriptor()

obj = MyClass()
obj.attr = 10  # 输出: Setting value: 10
print(obj.attr)  # 输出: Getting value: 10

class MyClass:
    def __init__(self):
        self._attributes = {}

    def __setattr__(self, key, value):
        if key == '_attributes':
            super().__setattr__(key, value)
        else:
            print(f'Setting attribute {key} to {value}')
            self._attributes[key] = value

    def __getattribute__(self, key):
        if key == '_attributes':
            return super().__getattribute__(key)
        return self._attributes.get(key, None)

obj = MyClass()
obj.some_attr = 20  # 输出: Setting attribute some_attr to 20
print(obj.some_attr)  # 输出: 20