1 import getpass
 2 import sys
 3 f = open(‘user.db‘,‘r‘)
 4 welcome="欢迎来欢乐多购物平台"
 5 data =http://www.mamicode.com/ f.read()
 6 f.close()
 7 user_db_list = []
 8 user_info_list = data.split(‘\n‘)
 9 print(user_info_list)
10 
11 for item in user_info_list:
12     temp = item.split(‘|‘)
13     v = {
14         ‘name‘: temp[0],
15         ‘password‘: temp[1],
16         ‘number‘: temp[2],
17     }
18     user_db_list.append(v)
19 print(welcome)
20 p = 0
21 while True:
22     user_name = input(‘请输入您的账号：‘)
23     if user_db_list:
24         user_password = input(‘请输入您的密码：‘)
25     for index,user_list in enumerate(user_db_list):
26         if user_name == user_list[‘name‘] and int(user_list[‘number‘]) < 3:
27             if user_password == user_list[‘password‘]:
28                 print(‘欢迎‘,user_name,‘登录我们平台‘)
29                 sys.exit()
30             else:
31                 print(‘账号密码错误，请重新输入‘)
32                 # data_read = open(‘user.db‘,‘r‘)
33                 #
34                 # data_write = open(‘user.db‘, ‘w‘)
35                 # data_write.write()
36                 break
37         else:
38             print(‘您输入的是未注册账号‘)
39             break
40     p += 1
41     if p == 3:
42         print(‘你的尝试超过限定次数，已退出‘)
43         break