Python 反射

class Demo():

    def start(self, *args, **kwargs):
        print("start")

    def shutdown(self, *args, **kwargs):
        print("shutdown")

    def update_status(self, **kwargs):
        action = kwargs['action']
        func = getattr(self, action, None)
        if not func:
            raise Exception
        task_id = func(**kwargs)


demo = Demo()
filter = {'action': 'start'}
demo.update_status(**filter)

echo start