1 #Author:AXIN
 2 #功能：登錄窗口
 3 #       1.輸入用戶名，密碼
 4 #       2.認證成功後輸出提示信息，表示歡迎
 5 #       3.輸錯3次後鎖定用戶名（寫入文件）
 6 _name = ‘AXIN‘
 7 _password = ‘123qwe‘
 8 temp = 0
 9 count_2 = 0
10 lock_flag = 0
11 
12 name = input("Name:")
13 password = input("Password:")
14 
15 f = open("lock_name.txt")
16 line = f.readline()
 
17 while line:
18     temp = line
19     if name+‘\n‘ == temp:
20         f = open(‘lock_name.txt‘, "a+")
21         f.write(str(name) + "\n")
22         f.close()
23         print("The name : {0} is already locked !".format(name))
24         lock_flag = 1
25         break
26     else:
27         line = f.readline()
 
28 
29 if name + ‘\n‘ != temp:
30     while True:
31         if _name == name and _password == password:
32             print("You are right ,Welcome !")
33             break
34         else:
35             count_2+=1
36             if count_2 <3:
37                 print("You are wrong ,try again ,You have {0} times left !
 
".format(3-count_2))
38                 password = input("Password:")
39             else:
40                 break
41     if count_2 == 3:
42         f = open(‘lock_name.txt‘,"a+")
43         f.write(str(name) +"\n")
44         f.close()
45         print("The name : {0} is locked !".format(name))
46 f.close()

作業一：登錄界面（優化，能讀取鎖定文件中的任意用戶名，一旦發現所輸入的用戶名是鎖定文件中的，立即告知並跳出循環）