您可以从
dict该类派生并在任何更改上添加回调。这需要覆盖任何更改字典的方法：
class NotifyDict(dict): __slots__ = ["callback"] def __init__(self, callback, *args, **kwargs): self.callback = callback dict.__init__(self, *args, **kwargs) def _wrap(method): def wrapper(self, *args, **kwargs): result = method(self, *args, **kwargs) self.callback() return result return wrapper __delitem__ = _wrap(dict.__delitem__) __setitem__ = _wrap(dict.__setitem__) clear = _wrap(dict.clear) pop = _wrap(dict.pop) popitem = _wrap(dict.popitem) setdefault = _wrap(dict.setdefault) update = _wrap(dict.update)
