python 继承父类的变量和方法

[root@zz python]# cat a1.py 
 # !/usr/bin/env python
# -*- coding: utf-8 -*-
class AddrBookEntry(object): ##类定义
    def __init__(self,a,b): ##定义构造器
        self.var1=a+9
        self.var2=b+11
    def updatePhone(self, num):  # 定义方法
        self.var3 = num +str(100)
        return self.var3
    
class EmplAddrBookEntry(AddrBookEntry):
    def __init__(self, x, y):
       # 调用父类构造函数
       super(EmplAddrBookEntry,self).__init__(11,22)
       
a=EmplAddrBookEntry(11,22)

print a
print type(a)
print dir(a)
print a.updatePhone('llll')
print a.var1
print a.var2
[root@zz python]# python a1.py 
<__main__.EmplAddrBookEntry object at 0x7fc35091ad50>

['__class__', '__delattr__', '__dict__', '__doc__', '_