save project

diy2.py

+i=3
 username = 'python'
 userpassword = "123456"
 while True:
+    if i>0:
+        i-=1
         a=input('输入账号:')
         if a != username:
             print("用户名不正确:")
@@ -11,4 +14,7 @@ while True:
                 break    
             else:
                 print('密码错误')
+    else:
+        print('locked!')
+        exit()
 print("欢迎来到贝尔编程!:")
\ No newline at end of file