场景:有一辆车违章需要通知到车主
定义两个类车辆类和通知类,车辆类和通知类并没有共同点,但是要通知车主这两个类就有了关联,这时候可以把这两个类组合在一起
#!/usr/bin/python3 # -*- coding: utf-8 -*- class Car: """车辆类""" def __init__(self, car_type, car_number): self.type = car_type self.car_number = car_number def car_type(self): return self.type def car_number(self): return self.car_number class Notice: """通知类""" def __init__(self, addr, message, car_info): self.addr = addr self.message = message self.car_info = car_info def message_sms(self): print(self.car_info.car_number + self.car_info.car_type() + "在" + self.addr + self.message) car = Car("小客车", "浙A99999") notice = Notice("杭州文一路", "不按规定停车", car) notice.message_sms()
>>>浙A99999小客车在杭州文一路不按规定停车