Python基礎-用戶驗證

1、項目需求

　　一、根據用戶名和密碼，驗證用戶是否可登錄

　　二、容許一次執行可驗證三次

　　三、當用戶名輸錯三次後，該用戶名鎖定，永久不可登錄

 

2、代碼以下

　　

 1 #!/usr/bin/env python
 2 #-*- coding:utf-8 -*-
 3 #import operator
 4 n = 0
 5 username="user123"
 6 password="123.abc"
 7 count_dict={}
 8 tmp_dict={}
 9 with open("lock",mode="r+",encoding="utf8") as f_read,open("lock_tmp",mode="a+",encoding="utf8") as f_write:
10 #lock文件和lock_tmp要先建立
11     while n<3:
12         name=input("please input username:").strip()
13         pwd=input("please input passwd:").strip()
14         for line in f_read:
15             if name in line:
16                 print("當前用戶已經被鎖定，請聯繫管理員！！")
17                 exit()
18         if name == username and pwd == password:
19             print("歡迎%s登陸"%username)
20             exit()
21         else:
22             print("用戶名或密碼錯誤，請從新輸入！")
23             f_write.write(name+"\n")
24             if name not in tmp_dict:
25                 tmp_dict[name]=1
26             else:
27                 tmp_dict[name]+=1
28         n+=1
29     # print(tmp_dict)
30     for line in f_write.readline():
31         line = line.strip()
32         count = count_dict.setdefault(line,0)
33         count+=1
34         count_dict[line]=count
35     print(count_dict)
36     f_write.seek(0)
37     for k in count_dict.keys():
38         print(k,count_dict[k])
39         # print(count_dict[k])
40         if count_dict[k] >= 3:
41             f_read.write(k+"\n")
42     for k1 in tmp_dict.keys():
43         if tmp_dict[k1]>=3:
44             f_read.write(k1+"\n")