9.面向对象编程

class Dog:
    def __init__(self,name,color):
        self.name = name
        self.color = color


    def __str__(self):
        print("一只%s的狗叫%s" % (self.color,self.name))


    def bark(self):
        print("小狗汪汪叫")


    def shake(self):
        print("小狗摇尾巴")

dog=Dog("大黄","黄颜色")
dog.__str__()
dog.shake()
dog.bark()