#-*-  coding:utf-8 -*-

 class A(object):

     name = "sashuangyibing"

     __mingzi = "bingyishuangsa"    # 这个是私有变量，只能在类A之内可以使用，超过类A之外是无法引用到

     def fun1(self):

         print "This is common method"

     def __fun2(self):   # 这个是私有方法，只能在类A之内可以使用，超过类A之外是无法引用到

         print "This is private method"

     def fun4(self):

         return self.__mingzi    # 该私有变量在当前类之内可以被引用

 class B(A):

     def __init__(self):

         super(B,self).__init__()

     def fun3(self):

         print "fun3"

 aa = A()

 print aa.name

 print aa.fun4()

 print aa._A__mingzi

 aa._A__fun2()

sashuangyibing

bingyishuangsa

bingyishuangsa

This is private method

aa = A()

print aa.__mingzi

Traceback (most recent call last):

  File "E:\04.script\work\test.py", line 21, in <module>

    print aa.__mingzi

AttributeError: 'A' object has no attribute '__mingzi'

aa = A()

print aa.__fun2()

Traceback (most recent call last):

  File "E:\04.script\work\test.py", line 21, in <module>

    print aa.__fun2()

AttributeError: 'A' object has no attribute '__fun2'

aa = A()

print aa._A__mingzi    # A前面只有一个下线线

print aa._A__fun2()

bingyishuangsa

This is private method