跟踪python中行之间的值更改(特定更改)

class Observable:
    def __init__(self):
        self._observers = []

    def add_observer(self, observer):
        self._observers.append(observer)

    def remove_observer(self, observer):
        self._observers.remove(observer)

    def notify_observers(self, attribute, value):
        for observer in self._observers:
            observer.update(attribute, value)


class Observer:
    def update(self, attribute, value):
        pass


class MyClass(Observable):
    def __init__(self):
        super().__init__()
        self._my_attribute = None

    @property
    def my_attribute(self):
        return self._my_attribute

    @my_attribute.setter
    def my_attribute(self, value):
        self._my_attribute = value
        self.notify_observers('my_attribute', value)


class MyObserver(Observer):
    def update(self, attribute, value):
        if attribute == 'my_attribute':
            print(f"my_attribute has been changed to {value}")


# 示例用法
obj = MyClass()
observer = MyObserver()
obj.add_observer(observer)

obj.my_attribute = 10  # 触发通知，输出 "my_attribute has been changed to 10"