auto save

diy2.py

@@ -9,6 +9,6 @@ while True:
     if name != username or password != userpassword:
         if name != username:
             print("用户名不存在请重新输入")
-        if password != userpassword:
-            print("密码错误!请重新输入")
+        elif password != userpassword:
+            print("密码错误!请重新输入")       
 print("欢迎来到贝尔编程!")
\ No newline at end of file