#Author:clark class Animal(object):#python3中新式类写法，继承object（所有类的基类）     #kind = ""    #类属性     def __init__(self,name,age,food):#name等是实例属性  init方法叫做构造方法__del__是析构方法         self.Name = name         self.Age = age         self.food = food     def eat(self):         print("%s is eat %s" %(self.Name,self.food))     def barking(self):         print("%s is barking"%self.Name) class dog(Animal):   #狗是动物的子类，如果增加新的属性并且要继承父类的属性，按照下面这样去写     def __init__(self,name,age,food,kind):         #Animal.__init__(self,name,age,food)   经典类的写法，这种写法比较繁琐，如果该类继承多个类的相同属性，就需要每个类都要写，新式类使用super写法，写一个就行         super(dog,self).__init__(name,age,food)         self.kind = kind     def barking(self):         print("the barking of %s is wangwangwang!"%self.Name) class cat(Animal):     def __init__(self,name,age,food,kind):         #Animal.__init__(self,name,age,food)         super(cat,self).__init__(name,age,food)         self.kind = kind     def barking(self):         print("the barking of %s is miaomiaomiao"%self.Name) dog_teddy = dog("ahuang",3,"bone","teddy") dog_teddy.eat() cat_xiaohua = cat("xiaohua",2,"fish","cat") cat_xiaohua.eat() dog_teddy.barking() cat_xiaohua.barking() 运行结果为：

ahuang is eat bone

xiaohua is eat fish

the barking of ahuang is wangwangwang!

the barking of xiaohua is miaomiaomiao