1 #!/usr/bin/env python
 2 #encoding: utf-8
 3 #登录程序，输入用户和密码输出欢迎信息，输入错误三次锁定用户，不让登录
 4 import sys
 5 print  (‘‘‘
 6         欢迎登陆我们的系统
 7 ‘‘‘)
 8 
 9 pass_file = open(‘passwd.txt‘,‘r‘)
10 clok_file = open(‘clok.txt‘,‘r‘)
11 
12 name_list = []
13 clok_list = []
14 name_dict = {}
15 for i in pass_file:
16     name, passwd = i.strip(‘\n‘).split(‘:‘)
17     name_list.append(name)
18     name_dict[name] = passwd
19 pass_file.close()
20 for i in clok_file:
21     clok_list.append(i.strip(‘\n‘))
22 clok_file.close()
23 #print (clok_list)
24 
25 num = 1
26 name = input(‘please input your name:‘)
27 if name in clok_list:
28     print (‘your name is clok ,peasle system admin‘)
29     sys.exit()
30 if name in name_dict:
31     while num <=3:
32         passwd = input(‘please input your passwd:‘)
33         if passwd == name_dict[name]:
34             print (‘welcome to wo system‘)
35             break
36         else:
37             print (‘pass error‘)
38             num += 1
39 else:
40     print (‘user no system‘)
41 
42 if num > 3:
43     print (‘your name is clok ,peasle system admin‘)
44     f = open(‘clok.txt‘,‘a‘)
45     f.write(name +‘\n‘)
46     f.close()