在python类中定义事件回调

class Event:
    def __init__(self):
        self.callbacks = []

    def register(self, callback):
        self.callbacks.append(callback)

    def unregister(self, callback):
        self.callbacks.remove(callback)

    def fire(self, *args, **kwargs):
        for callback in self.callbacks:
            callback(*args, **kwargs)


class MyClass:
    def __init__(self):
        self.event = Event()

    def on_event(self, data):
        print("Event occurred:", data)

    def do_something(self):
        # 做一些操作
        # 触发事件
        self.event.fire("some data")


# 使用示例
obj = MyClass()
obj.event.register(obj.on_event)
obj.do_something()