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))