class Dog:   # 狗类
    def __init__(self):
        self.footNum = 4  # 腿
        self.eyeNum = 2   # 眼睛
        self.head = 1    # 头
        self.earsNum = 2   # 耳朵
        self.skin = "white"

    def run(self):
        print("狗狗飞快的跑起来")


class Husky(Dog):   # 哈士奇类
    def __init__(self):
        super().__init__()
        self.skin = 'black'
        print(self.skin)

coco = Husky()
print(coco.skin)