zancun

 1 class UserLogin:
 2     def __init__(self):
 3         self.file_name = "user_info"
 4         self.user_info = dict(
 5             [(line.strip().split(",")[0].lower(), line.strip().split(",")[1]) for line in open(self.file_name, "rb")
 6              if line])
 7 
 8     def login(self):
 9         for i in range(3):
10             user_name = raw_input(‘username:‘)
11             pwd = raw_input(‘passwd:‘)
12             cpwd = raw_input(‘cpasswd:‘)
13 
14             if not user_name or not pwd or not cpwd:
15                 print "账号、密码和确认密码都不能为空!"
16                 continue
17             if str(user_name).lower() in self.user_info:
18                 print "用户名已存在！"
19                 continue
20             if pwd != cpwd:
21                 print "两次密码输入不一致！"
22                 continue
23             if not (len(user_name) > 6 and len(user_name) < 12) or not (len(pwd) > 6 and len(pwd) < 12):
24                 print "账号和密码长度要大于等于6，小于等于12"
25                 continue
26 
27             self.user_info[user_name] = pwd
28             break
29         self.save()
30 
31     def save(self):
32         fw = open(self.file_name, "wb")
33         for user_name, pwd in self.user_info.items():
34             fw.write("{user_name},{pwd}\n".format(user_name=user_name.lower(), pwd=pwd))
35         fw.close()
36 
37 
38 userLogin = UserLogin()
39 userLogin.login()