用面向对象魔术方法实现命令分发器

[python]代码库

class Dispatcher:
    def __init__(self):
        self._run()

    def cmd1(self):
        print('I\'m cmd1')

    def cmd2(self):
        print('I\'m cmd2')

    def _run(self):
        while True:
            cmd = input("plz input a command:").strip()
            if cmd == 'quit':
                break
            getattr(self,cmd,lambda :print('unknown command {}'.format(cmd)))()

Dispatcher()