python-class(3)

 #!/usr/bin/env python
 #-*- coding:utf-8 -*-
 ############################
 #File Name: class3.py
 #Author: frank
 #Email: frank0903@aliyun.com
 #Created Time:2017-09-04 14:55:16
 ############################

 class Parent:
     parentAttr = 100
     def __init__(self):
         print "invoke construct of base class"

     def parentMethod(self):
         print "invode parentMethod"

     def setAttr(self, attr):
         Parent.parentAttr = attr

     def getAttr(self):
         print "attr of base class:", Parent.parentAttr

     def myMethod(self):
         print '调用父类方法'

 class Child(Parent):
     def __init__(self):
         print "invoke construct of sub class"

     def childMethod(self):
         print "invode childMethod"

     def myMethod(self):
         print '调用子类方法'

 c = Child()          # 实例化子类
 c.childMethod()      # 调用子类的方法
 c.parentMethod()     # 调用父类方法
 c.setAttr(200)       # 再次调用父类的方法 - 设置属性值
 c.getAttr()          # 再次调用父类的方法 - 获取属性值
 c.myMethod()

python3.5 环境下运行：

 # -*- coding: utf-8 -*-
 """
 Created on Mon Jun 11 12:49:01 2018

 @author: Frank
 """

 class Parent:
     parentAttr = 100
     def __init__(self):
         print("invoke construct of base class")

     def parentMethod(self):
         print("invode parentMethod")

     def setAttr(self, attr):
         Parent.parentAttr = attr

     def getAttr(self):
         print("attr of base class:{}".format(Parent.parentAttr))

     def myMethod(self):
         print('调用父类方法')

 class Child(Parent):
     def __init__(self):
         print("invoke construct of sub class")

     def childMethod(self):
         print("invode childMethod")

     def myMethod(self):
         print('调用子类方法')

 c = Child()          # 实例化子类
 c.childMethod()      # 调用子类的方法
 c.parentMethod()     # 调用父类方法
 c.setAttr(200)       # 再次调用父类的方法 - 设置属性值
 c.getAttr()          # 再次调用父类的方法 - 获取属性值
 c.myMethod()         # override
 print("attr:{}".format(c.parentAttr))