python中类的一些方法分析
本文实例分析了python中类的一些方法，分享给大家供大家参考。具体分析如下：
先来看看下面这段代码：
class Super:
def delegate(self):
self.action()
class Provider(Super):
def action(self):
print 'in Provider.action'
x = Provider()
x.delegate()
本文实例运行环境为Python2.7.6
运行结果如下：
in Provider.action
在Super类中定义delegate()方法，delegate中调用self.action，在Provider子类中实现action方法。子类调用父类的delegate方法时，实际是调用自己的action方法。。
总之一句话：
这里子类实现了父类delegate中所期望的action方法
再来看看下面这段代码：
class Super:
def delegate(self):
self.action()
def method(self):
print 'super method'
class Inherit(Super):
pass
class Replace(Super):
def method(self):
print "replace method"
class Extended(Super):
def method(self):
print 'in extended class'
Super.method(self)
print 'out extended class'
class Provider(Super):
def action(self):
print 'in Provider.action'
x = Inherit()
x.method()
print '*'*50
y = Replace()
y.method()
print '*'*50
z = Extended()
z.method()
print '*'*50
x = Provider()
x.delegate()
运行结果如下：
super method ************************************************** replace method ************************************************** in extended class super method out extended class ************************************************** in Provider.action
分别继承父类的方法，替换父类的方法，扩展了父类的方法
Super类定义了delegate方法并期待子类实现action函数，Provider子类实现了action方法.
相信本文所述对大家Python程序设计的学习有一定的借鉴价值。
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