有以下类定义：动物类属性：名称、年龄、性别 行为：吃 猫类继承动物行为： 吃重写 捉老鼠 狗类继承动物行为： 吃重写 看家

代码实现：

class Animal: def init(self, name, age, gender): self.name = name self.age = age self.gender = gender

def eat(self):
    print("Animal is eating")

class Cat(Animal): def eat(self): print("Cat is eating")

def catch_mouse(self):
    print("Cat is catching mouse")

class Dog(Animal): def eat(self): print("Dog is eating")

def watch_house(self):
    print("Dog is watching house")