工厂方法模式

class LeiFeng(object):

    def Sweep(self):
        print("扫地")

    def Wash(self):
        print("洗衣")

    def BuyRice(self):
        print("买米")


class IFactory(LeiFeng):

    def CreateLeiFeng(self):
        pass


# 大学生
class Undergraduate(LeiFeng):
    pass


# 新增社区服务者
class Volunteer(LeiFeng):
    pass


# 学习雷锋的大学生工厂
class UndergraduateFactory(IFactory):

    def CreateLeiFeng(self):
        return Undergraduate()


# 新增一个社区服务者的工厂
class VolunteerFactory(IFactory):

    def CreateLeiFeng(self):
        return Volunteer()


if __name__ == "__main__":
    student = UndergraduateFactory()
    volunteer = VolunteerFactory()
    student.BuyRice()
    student.Sweep()
    volunteer.Wash()