component.py 文件源码

def __init__(self, bus):
        assert isinstance(bus, Bus)
        self.__bus = bus
        self.__listeners = []
        weakref.finalize(self, _cleanup_listeners, self.__bus, self.__listeners)
        atexit.register(self.close)

        self._listen(event_ids.SYSTEM__QUIT, target_ids.ANY, self.__on_close)