How to use the feeluown.controller_api.ControllerApi.player.play_next function in feeluown

def Next(self):
        LOG.info('dbus: call play_next')
        ControllerApi.player.play_next()

run_event_loop()
            LOG.error('restart mac key board event loop')
            return event
        try:
            key_event = NSEvent.eventWithCGEvent_(event)
        except:
            LOG.info("mac event cast error")
            return event
        if key_event.subtype() == 8:
            key_code = (key_event.data1() & 0xFFFF0000) >> 16
            key_state = (key_event.data1() & 0xFF00) >> 8
            if key_code in (16, 19, 20):
                # 16 for play-pause, 19 for next, 20 for previous
                if key_state == NSKeyUp:
                    if key_code is 19:
                        ControllerApi.player.play_next()
                    elif key_code is 20:
                        ControllerApi.player.play_last()
                    elif key_code is 16:
                        ControllerApi.player.play_or_pause()
                return None
        return event

def handler(self, reply):
        """ This function is called when a xlib event is fired """
        data = reply.data
        while len(data):
            event, data = rq.EventField(None).parse_binary_value(
                data, self.disp.display, None, None)

            if event.type == X.KeyPress:
                pass
            elif event.type == X.KeyRelease:
                keycode = event.detail
                keysym = self.disp.keycode_to_keysym(keycode, 0)
                if hex(keysym) == MediaKey.media_next.value:
                    ControllerApi.player.play_next()
                elif hex(keysym) == MediaKey.media_previous.value:
                    ControllerApi.player.play_last()
                elif hex(keysym) == MediaKey.media_stop.value:
                    ControllerApi.player.stop()
                elif hex(keysym) == MediaKey.media_play_pause.value:
                    ControllerApi.player.play_or_pause()