python简明教程练习--命令行 地址簿 程序

    在这个程序中，你可以添加、修改、删除和搜索你的联系人（朋友、家人和同事等等）以及它们的信息（诸如电子邮件地址和/或电话号码）。这些详细信息应该被保存下来以便以后提取。

    由于上个程序中的代码没有把信息从文件中读取出来，我们可以把相同的信息保存在info.txt文件中去，这使得info.txt文件会有多余的东西。以下是我修改后的代码

代码：

#!/usr/bin/env python# -*-encoding:utf-8 -*-'''Created on 2011-10-16@author: Descusr'''import sysimport osimport cPickleclass Person(object):    filename = 'info.txt'    def __init__(self, name, phone):        self.name = name        self.phone = phone        self.personlist = {self.name:self.phone}    def add(self):        self.name = raw_input("Enter name:")        if self.name in self.personlist.keys():            print "The name is exist!"        else:            self.phone=raw_input("Enter phone:")            self.personlist[self.name] = self.phone            print "Contact saved!"    def Modify(self):        self.name = raw_input("Enter name:")        if self.name in self.personlist.keys():            self.phone = raw_input("Enter new phone:")            self.personlist[self.name] = self.phone            print "Contact saved!"        else:            print "The name is not in here!!"    def delete(self):        self.name = raw_input("Enter name:")        if self.name in self.personlist.keys():            del self.personlist[self.name]            print "Deleted!!"        else:            print "The name is not in here!!"    def search(self):        self.name = raw_input("Enter name:")        if self.name in self.personlist.keys():            print 'Name:%s,Phone:%s'%(self.name,self.phone)        else:            print "The name is not in here!!"    def save(self):        f = file(self.filename,'w')        cPickle.dump(self.personlist,f)        f.close()        print "Your contacts list has been saved to file:%s successfully~" %self.filename    def load(self):        if os.path.exists(self.filename):            f = file(self.filename)            self.personlist = cPickle.load(f)            f.close()    def show(self):        for self.name,self.phone in self.personlist.items():            print "Name:%s  Phone number:%s" %(self.name,self.phone)if __name__ == '__main__':    os.system('clear')    command = ['add','modify','search','delete','quit' ,'show']    person = Person('','')    person.load()    while True:        print "The contact person:"        str = raw_input('What are you going to do(add/modify/search/delete/show/quit)?')        if str in command:            if str == 'add':                person.add()            elif str == 'modify':                person.Modify()            elif str == 'search':                person.search()            elif str == 'delete':                person.delete()            elif str == 'show':                person.show()            else:                ch = raw_input("Your contacts list hasn't  been saved,save it now?(Y/N)")                if ch == 'y':                    person.save()                    sys.exit()                else:                    sys.exit()                print "Exit the System"                break        else:            print "Please input the command!"