#coding=utf8 import string,pickle,exceptions information={} print "                      welcome to My system!             " def pwdlen(pwd):  while (len(pwd)<6 or len(pwd)>10):      print "你的密码长度不合法！"      pwd = raw_input("请重新输入密码:")      if len(pwd)<6 or len(pwd)>10:          continue      else:          print "密码输入成功"          information[user] = pwd          f1 = open('user.txt', 'wb')          d = information          pickle.dump(d,f1)          f1.flush()          f1.close()          break  else:      print "密码输入成功"      information[user] = pwd      f1 = open('user.txt', 'wb')      d = information      pickle.dump(d, f1)      f1.flush()      f1.close() def registed():  # 注册     while 1:         global user         user = raw_input("请输入您的注册用户名:")         if user in information.keys():             print "注册失败，请重新选择"             continue         else:             global password             password = raw_input("请输入您的注册密码:")             pwdlen(password)             print "注册成功"             break def loginjudge():     num = 3     nums = 6     user = raw_input('请输入您的账号: ')     read_file = open('user.txt', 'rb')     information = pickle.load(read_file)     read_file.close()     while user not in information.keys():  # 帐号输入三次报错         print "帐号不存在,你还有%s次机会，" % (nums - 3)         user = raw_input("请重新输入您的账号: ")         nums = nums - 1         if nums > 3:             if user not in information.keys():                 continue         else:             print "帐号输入错误超过3次，退出系统"             break     else:         while num >= 0:             password = raw_input("请输入登录密码：")             if password == information[user]:                 print("欢迎用户%s来到lcy系统！" % user)                 break             elif num == 0:                 print ("对不起，您的密码连续输错三次，请充值完再来")                 break             else:                 print("密码错误，请重新输入密码,你还有%s次机会") % (num)             num = num - 1         else:             print ("对不起，您的密码连续输错三次，请充值完再来") def checkuser():     while 1:         read_file = open('user.txt', 'rb')         information = pickle.load(read_file)         read_file.close()         user=raw_input("请输入你要查看的账号:")         if user not in information.keys():          print "你输入的账号不存在"          continue         else:           print "该账号密码为%s"%information[user]           break def chinfo():     read_file = open('user.txt', 'rb')     information = pickle.load(read_file)     read_file.close()     global user     user = raw_input("请输入你要修改的用户:")     while user not in information.keys():         user = raw_input("请重新输入你要修改的用户:")         if user not in information.keys():          print "此用户不存在"          continue     else:         a = input("1.修改用户名;2.修改密码;3.全部修改")         if a == 1:             newuser = raw_input("请输入新的用户名:")             x = information[user]             information.pop(user)             information[newuser] = x             f1 = open('user.txt', 'wb')             d = information             pickle.dump(d, f1)             f1.flush()             f1.close()             print "修改成功"         elif a == 2:             newpassword = raw_input("请输入新的密码:")             pwdlen(newpassword)             information[user] = newpassword             print "修改成功"         elif a == 3:             newuser = raw_input("请输入新的用户名:")             newpassword = raw_input("请输入新的密码:")             pwdlen(newpassword)             information[newuser] = newpassword             information.pop(user)             print "修改成功" def checkall():     try:         read_file = open('user.txt', 'r')         information = pickle.load(read_file)         print information         read_file.close()     except IOError:         print "没有用户存在!" def deluser():     read_file = open('user.txt', 'rb')     information = pickle.load(read_file)     read_file.close()     print information     while 1:         deluser = raw_input("请选择注销的用户名:")         if deluser not in information:             print "所选用户不存在"             break         else:             del information[deluser]             f1 = open('user.txt', 'wb')             d = information             pickle.dump(d, f1)             f1.flush()             f1.close()             print "注销成功!"             break def choose():     while 1:         try:             choice =input("请选择你的操作:1.注册;2.登录;3.修改个人信息;4.查看账号;5.查看所有账号;6.退出系统;7.注销用户:")             if choice > 7 or choice < 1:                 print "无效选项,请重新选择"             elif choice == 1:                 print "你已经进入用户注册页面"                 registed()             elif choice == 2:                 print "你已经进入用户登录页面"                 loginjudge()             elif choice == 3:                 print "你已经进入用户修改页面"                 chinfo()             elif choice == 4:                 checkuser()             elif choice == 5:                 checkall()             elif choice==6:                 print "你已经退出系统！"                 break             else:                 deluser()         except SyntaxError,reason:             print reason         except NameError,reason:             print reason choose()