day_5.02 py

 '''
 2018-5-2 18:43:54
 设计4s店类
 设计模式:
 简单工厂模式(通过一个类的分离模式)

 讨论耦合性的问题
 类与类之间应该是低耦合性
 通过有个 初始化 __init__ 来解耦

 这样就是工厂模式
 父类方法名就是接口,子类里面实现
 (流程在基类里面定义好,然后在子类里面实现)
 '''

 class Store(object):
     def select_car(self):
         pass
     def order(self,car_type):
         return self.select_car(car_type)

 class BMWCarStore(Store):
     def select_car(self,car_type):
         return BMWCarStore().select_car_by_type(car_type)

 class CarStore(Store):
     def select_car(self,car_type):
         return Factory().select_car_by_type(car_type)

 class   BMWFactory(object):
     def select_car_by_type(self,car_type):
         pass

 class CarStore(object):
     def __init__(self):
         self.factory = Factory()
     def order(self,car_type):
         return self.factory(car_type)

 class Factory(object):
     def select_car_by_type(car_type):
         if car_type=="索纳塔":
             return Suonata()
         elif car_type=="名图":
             return Mingtu()
         elif car_type=="ix35":
             return Ix35()

 class Car(object):
     def move(self):
         print("车在移动")
     def music(self):
         print("车在播放音乐")
     def stop(self):
         print("车在停止,,,,,,")

 class Suonata(Car):
     def move(self):
         print("车在移动")
     def music(self):
         print("车在播放音乐")
     def stop(self):
         print("车在停止,,,,,,")

 class Mingtu(Car):
     pass
 class Ix35(Car):
     pass

 car_store =CarStore()
 car =car_store.order("索纳塔")
 car.move()
 car.music()
 car.stop()
 bmw_store =BMWCarStore()
 bmw =bmw_store.order("720li")