python一个简单的登录

文件目录下有两个文件

user_name.txt

lock_file.txt

实际中可以读数据库里的信息

代码如下

 1 #encoding = utf-8
 2 import sys
 3
 4 user_file = ‘user_name.txt‘
 5 lock_file = ‘lock_file.txt‘
 6
 7 retry_count = 0
 8 retry_limit = 3
 9
10 while retry_count < retry_limit:
11     username = raw_input(‘\033[32;1mUsername:\033[0m‘)
12     lock_check = file(lock_file)
13     for line in lock_check.readlines():　　　　　　 line = line.split()
14         if username == line[0]:
15         sys.exit(‘%s is locked‘ % username)
16
17     passwd = raw_input(‘\033[32;1mPassword:\033[0m‘)
18
19     f = file(user_file,‘rb‘)
20     match_flag = False
21     for line in f.readlines():
22     　　 user,password = line.strip(‘\n‘).split()
23         if username == user and passwd == password:
24         match_flag = True
25         break
26     f.close()
27     if match_flag == False:
28     　　 print ‘User unmatched‘
29         retry_count += 1
30     else:
31     　　print ‘Welcome login Learning python‘
32     　　sys.exit(0)
33 else:
34     print ‘Your account is lock‘
35     f = file(lock_file,‘ab‘)
36     f.write(username+‘\n‘)
37     f.close()