save project

diy2.py

@@ -6,8 +6,8 @@ while True:
     if name == username and password == userpassword:
         print("登录成功!")
         break
-    if name != username
+    elif name != username
     print("用户名错误，请重新输入")
-    if name != username
+    elif name != username
     print("密码错误，请重新输入")
 print("欢迎来到贝尔编程!")