python 类的基础知识

1 class Book(object):
2     def __init__(self,b):   #定义构造器
3         self.name=b
4         print self.name
5     def updatename(self,a):
6         self.name=a
7         print self.name

1 c=Book(‘mike‘)

1 >>> c.name
2 ‘mike‘
3 >>> c.updatename(‘jone‘)
4 jone
5 >>> c.name
6 ‘jone‘

1 class AllBook(Book):
2     def __init__(self,b,em):
3         Book.__init__(self,b)
4         self.email=em
5     def updateemail(self,d):
6         self.email=d
7         print self.email

1 >>> e=AllBook(‘mike‘,‘123@qq.com‘)
2 mike
3 >>> e.email
4 ‘123@qq.com‘
5 >>> e.updateemail(‘666@qq.com‘)
6 666@qq.com
7 >>> e.email
8 ‘666@qq.com‘