python新生类和经典类简单说明

经典类:
#!/usr/bin/env python
#*-* coding:utf-8 *-*
class A():
    def __init__(self):
        print 'my name is GF'
   
    def test(self):
        print 'this is ====A====='
class B(A):
    def __init__(self):
        print 'my name is BFather'
class C(A):
    def  __init__(self):
        print 'my name is Cfather'
   
    def test(self):
        print 'this is ======C======'
class D(B,C):
    def  __init__(self):
        print 'my name is D'
t1 =D()
t1.test()
执行效果:
my name is D
this is ======A======
#继承关系,先找B,如果B没有则找A.(深度优先)

  

 
新生类:
#!/usr/bin/env python
#*-* coding:utf-8 *-*
class A(object):
    def __init__(self):
        print 'my name is GF'
   
    def test(self):
        print 'this is ====A====='
class B(A):
    def __init__(self):
        print 'my name is BFather'
class C(A):
    def  __init__(self):
        print 'my name is Cfather'
   
    def test(self):
        print 'this is ======C======'
class D(B,C):
    def  __init__(self):
        print 'my name is D'
t1 =D()
t1.test()
 
执行结果
my name is D
this is ======C======
#继承关系,先找B,如果B没有则找C(广度优先)
 
当然,class D(B,C) 这里是先执行B,在执行C的。
 
小结:经典类深度优先,新生类广度优先。
class A(object):
    def __init__(self):
        print 'my name is GF'

    def test(self):
        print 'this is ====A====='
class B(A):
    def __init__(self):
        print 'my name is BFather'
class C(A):
    def  __init__(self):
        print 'my name is Cfather'

    def test(self):
        print 'this is ======C======'
class D(B,C):
    def  __init__(self):
        print 'my name is D'
        super(D,self).__init__()
t1 =D()
t1.test()

这里执行父类的构造函数,可以使用super方法,这也是新生类的特点。
如果使用经典类的话,那么调用父类的构造函数或者是方法,只能使用父类.方法(self)的方法

  

小结:新生类是支持super方式调用父类的方法。

 
 
 
posted @ 2018-01-11 21:09  某电商首席日志工程师  阅读(258)  评论(1编辑  收藏  举报