状态模式

import time

class IState(object):
    def work(self):
        pass
class Programer(object):
    _state = IState()
    def __init__(self,hour):
        if hour < 9:
            self._state = restState()
        elif hour < 18:
            self._state = programState()
        else:
            self._state = gameState()

    def work(self):
        
        self._state.work()

class programState(IState):
    def work(self):
        print ‘programming!‘

class gameState(IState):
    def work(self):
        print ‘playing game!‘

class restState(IState):
    def work(self):
        print ‘rest time!‘


if __name__ == ‘__main__‘:
    hour = int(time.strftime("%H"))
    programer = Programer(hour)
    programer.work()