核心代碼：

代碼如下:
#!/usr/bin/python
#Filename:friendbook.py
import cPickle as p
import sys
import time
import os

ab={'Xdex':'cneds@fnedf.com',
        'Laexly':'fev@fe.com',
        'Fukc':'fexok@ver.com',
        'Stifu':'stif@qq.com'
}

def Dumpfile(list):
        f=file(friendab,'w')
        p.dump(list,f)
        f.close()

if os.path.isfile('friendab.data'):
        friendab='friendab.data'
else:
        os.touch('friendab.data')
        Dumpfile(ab)
        del ab

f=file(friendab)
frilist=p.load(f)

class Person:
        def __init__(self,name):
                self.name=name
        def saysome(self):
                print 'The friend %s,his E-mail is %s '%(sname,frilist[sname])
class addPerson:
        def __init__(self,name,email):
                self.name=name
                self.email=email
        def addbook(self):
                ab=frilist
                ab[sname]=email
                Dumpfile(ab)
                del ab
                print 'Succlessful!'
class delPerson:
        def __init__(self,name):
                self.name=name
        def delbook(self):
                ab=frilist
                ab.pop(sname)
                Dumpfile(ab)
                del ab
                print 'Success DEL'