python面向对象的继承

无话可说，继承主要是一些父类继承，代码是非常具体的

#!/usr/bin/env python
#coding:utf-8
 
class Father(object):#新式类
    def __init__(self):
        self.name='Liu'
        self.FamilyName='Yan'
 
    def Lee(self):
        print '我是父类函数Lee'
 
    def Allen(self):
        print "我是父类函数Allen"
 
class Son(Father):
    def __init__(self):
        #Father.__init__(self)   #经典类运行父类构造函数
        super(Son,self).__init__()  #新式类运行父类构造函数
        self.name='Feng'
 
    def Aswill(self): #子类新增函数
        print 'Son.Bar'
 
    def Lee(self):#重写父类函数Lee
        print '子类重写了父类函数Lee'
 
s1=Son()
print "继承了父类的姓"+ s1.FamilyName
print "重写了父类的名字",s1.name
s1.Lee() #子类重写了父类函数Lee
s1.Allen() #子类继承了父类函数Allen

继承多个类时的顺序，经典类继承是深度优先，是一个BUG, 新式类是广度优先，应该是用新式类去定义类

新式类

class A(object): #新式类的写法
    def __init__(self):
        print 'This is from A'
 
    def test(self):
        print 'This is test from A'
 
class B(A):
    def __init__(self):
        print "This is from B"
 
class C(A):
    def __init__(self):
        print "This is from C"
 
    def test(self):
        print "This is test from C"
 
class D(B,C):
    def __init__(self):
        print 'this is D'
 
T1=D()
T1.test()

经典类

class A:
    def __init__(self):
        print 'This is from A'
 
    def test(self):
        print 'This is test from A'
 
class B(A):
    def __init__(self):
        print "This is from B"
 
class C(A):
    def __init__(self):
        print "This is from C"
 
    def test(self):
        print "This is test from C"
 
class D(B,C):
    def __init__(self):
        print 'this is D'
 
T1=D()
T1.test()

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