save project

diy2.py

+i = 3
 username = "python"
 userpassword = "123456"
 while True:
+    if i>0:    
         name = input("请输入用户名:")
         password = input("请输入密码:")
+        i = i - 1
         # if name == username and password == userpassword:
         #     print("登录成功!")
         #     break
@@ -14,3 +17,5 @@ while True:
             else:
                 print("登录成功!")
             break
+    else:
+        print("系统已被锁定，请使用身份证解锁。")
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