class 猫：def 喵喵叫(self):print '喵喵叫'def 吃(self):# do somethingdef 喝(self):# do somethingdef 拉(self):# do somethingdef 撒(self):# do somethingclass 狗：def 汪汪叫(self):print '喵喵叫'def 吃(self):# do somethingdef 喝(self):# do somethingdef 拉(self):# do somethingdef 撒(self):# do something伪代码

伪代码

class 动物:def 吃(self):# do somethingdef 喝(self):# do somethingdef 拉(self):# do somethingdef 撒(self):# do something# 在类后面括号中写入另外一个类名，表示当前类继承另外一个类
class 猫(动物)：def 喵喵叫(self):print '喵喵叫'# 在类后面括号中写入另外一个类名，表示当前类继承另外一个类
class 狗(动物)：def 汪汪叫(self):print '喵喵叫'伪代码

伪代码

class Animal:def eat(self):print "%s 吃 " %self.namedef drink(self):print "%s 喝 " %self.namedef shit(self):print "%s 拉 " %self.namedef pee(self):print "%s 撒 " %self.nameclass Cat(Animal):def __init__(self, name):self.name = nameself.breed ＝ '猫'def cry(self):print '喵喵叫'class Dog(Animal):def __init__(self, name):self.name = nameself.breed ＝ '狗'def cry(self):print '汪汪叫'# ######### 执行 #########c1 = Cat('小白家的小黑猫')
c1.eat()c2 = Cat('小黑的小白猫')
c2.drink()d1 = Dog('胖子家的小瘦狗')
d1.eat() 

class Animal:def eat(self):print "%s 吃 " %self.namedef drink(self):print "%s 喝 " %self.namedef shit(self):print "%s 拉 " %self.namedef pee(self):print "%s 撒 " %self.nameclass Cat(Animal):def __init__(self, name):self.name = nameself.breed ＝ '猫'def cry(self):print '喵喵叫'class Dog(Animal):def __init__(self, name):self.name = nameself.breed ＝ '狗'def cry(self):print '汪汪叫'# ######### 执行 #########c1 = Cat('小白家的小黑猫')
c1.eat()c2 = Cat('小黑的小白猫')
c2.drink()d1 = Dog('胖子家的小瘦狗')
d1.eat()代码实例

继承实例

class AddrBookEntry(object):'address book entry class'def __init__(self,nm,ph):self.name = nmself.ph = phprint("Created instance for:",self.name)def UpdatePhone(self,newph):self.ph = newphprint('Updated phone %s for:'%self.ph ,self.name)class EmplAddrBookEntry(AddrBookEntry):'Employee Address Book Entry class'def __init__(self,nm,ph,id,em): #重写initsuper(EmplAddrBookEntry,self).__init__(nm,ph) #继承父类的init#AddrBookEntry.__init__(self,nm,ph)self.empid = idself.email = emdef updateEmail(self,newem):self.email = newemprint('Updated e-mail address %s for:'%self.email,self.name)new  = AddrBookEntry("koka",'10010')  #父类生成实例
new.UpdatePhone("10000") #使用方法更新
newnew = EmplAddrBookEntry("akok","10086","001","wlgc.com") #子类生成实例 继承父类的nm,ph 重写id,em
newnew.updateEmail("12345@qq.com") #子类实例使用自己的方法
newnew.UpdatePhone("10010") #子类实例继承使用父类方法

import time
class A(object):n = 'A'def f2(self):print("f2 from A")def f1(self):print("f1 from A")
class B(A):n = 'B'def f1(self):print("f1 from B")#def f2(self):#    print("f2 from B")class C(A):n = 'C'def f1(self):print("f1 from C")def f2(self):print("f2 from C")class D(B,C):n = 'D'def __del__(self):#会在程序结束后执行，释放内存print("deleting the ...")d = D()
d.f1() #输出 f1 from B
d.f2() #输出 f2 from C
# 新式类：D -> B -> C -> A   广度查找(从左至右查找最近的)
# 经典类:  D-> B -> A         深度查找，在python3.0以后默认为广度查找

实例：class Animal:def __init__(self, name):    # Constructor of the classself.name = namedef talk(self):              # Abstract method, defined by convention onlyraise NotImplementedError("Subclass must implement abstract method")class Cat(Animal):def talk(self):return 'Meow!'class Dog(Animal):def talk(self):return 'Woof! Woof!'animals = [Cat('Missy'),Dog('Lassie')]for animal in animals:print animal.name + ': ' + animal.talk()

"""def animal_talk(obj):    print(obj.talk())

d = Dog("sanjiangyuan")c = Cat("sanjiangshui")animal_talk(c)animal_talk(d)"""