用户登录系统实现-优快云博客

需求：

写一个用户登录窗口
验证输入的用户名和密码，若正确打印欢迎信息，输入错误三次则加入锁定名单。
锁定名单要持久化存储

 1 # *-* coding:utf-8 *-*
 2 # Auth: wangxz
 3 import pickle
 4 
 5 print("-------the login---------")
 6 _username = "wangxz"
 7 _passwd = 123456
 8 
 9 def username_is_lock(name):
10     with open(".\login.text", "rb") as fobj:
11         name_list = []
12         try:
13             name_list.append(pickle.load(fobj))
14         except EOFError:  # 这个异常没有任何影响
15             return None
16     try:
17         name_list.index(name)
18     except Exception as e:
19         return False  # 没有在被锁定的文件中找到用户
20     else:
21         return True   # 在被锁定的文件中找到用户
22 
23 
24 
25 RESUBMIT_COUNT = 0   # 定义一个常量
26 while True:
27     if RESUBMIT_COUNT <= 3:
28         username = input("username: ")
29         if not username_is_lock(username):  # 没有找到文件
30             passwd = input("password: ")
31             if  _username == username and _passwd == passwd: # 登录成功
32                 print("The login successfully!")
33                 break
34             else:
35                 RESUBMIT_COUNT += 1
36                 if RESUBMIT_COUNT == 3:  # 已经输入三次，账户锁定
37                     print("The Warning! Your account has been locked")
38                     with open(".\login.text", "wb") as fd: # 写入文档
39                         pickle.dump(username, fd)
40                     break
41                 else:
42                     print("Please input your account and passwd again!")
43         else:  # 若已经在锁定文档中找到文件，则打印信息直接退出
44             print("Your account has benn locked.\r\nPlease connection the wxz ")
45             break