class Person:

     def __init__(self,name,sex,age,position):

         self.name = name

         self.sex = sex

         self.age = age

         self.position = position

 class Car:

     def __init__(self,brand,price,color):

         self.brand = brand

         self.price = price

         self.color = color

 class Phone:

     def __init__(self,brand):

         self.brand = brand

     def call_up(self):

         print("I'm calling you...")

 jack = Person('jack','male',35,'Manager')   #实例化一个人

 jack.car= Car(brand = 'Cadillac',price = 200000,color = 'Red')  #给人新增一个车的属性，即人可以拥有一辆车，并实例化一辆车，再赋值给属性

 jack.phone = Phone('SamSung')   #原理同上

 print(jack.car.brand)   #注意属性之间的调用写法顺序

 print(jack.car.color)

 print(jack.car.price)

 print(jack.phone.brand)

 jack.phone.call_up()    #调用方法

 Cadillac

 Red

 200000

 SamSung

 I'm calling you...