利用python实现简单登陆注册系统

1 #！/usr/bin/env python
2 # -*- coding:utf-8 -*-
3
4
5 def login(username,password):
6     '''
7
8     :param username:用户名
9     :param password:密码
10     :return: True:登陆成功  False:登陆失败
11     '''
12     f = open('log','r',encoding='utf-8')
13     for line in f:
14         line = line.strip()
15         line_list = line.split('$')
16         if username ==line_list[0] and password ==line_list[1]:
17             print('success')
18             return True
19         return False
20
21 def register(username,password):
22     '''
23
24     :param username:
25     :param password:
26     :return:
27     '''
28     with open('log','a',encoding='utf-8') as f:
29         temp = '\n' + username + '$' + password
30         f.write(temp)
31     return True
32
33 def user_exit(username):
34     '''
35
36     :param username:
37     :return:
38     '''
39     with open('log','r',encoding='utf-8') as f:
40         for line in f:
41             line = line.strip()
42             line_list = line.split('$')
43             if line_list[0]==username:
44                 return True
45     return False
46
47 def main():
48     print('欢迎登陆XX系统')
49     inp = input('1:登陆；2：注册')
50     user = input('user:')
51     pwd = input('pwd:')
52     if inp =='1':
53         is_login = login(user,pwd)
54         if is_login:
55             print('success')
56         else:
57             print('fail')
58     elif inp =='2':
59         is_exit = user_exit(user)
60         if is_exit:
61             print('already register')
62         else:
63             result = register(user,pwd)
64             if result:
65                 print('register sucess')
66             else:
67                 print('resgister faild')
68 main()