save project

diy1.py

 username = "python"    # 保存在服务器数据库中的用户账号（正确的账号）
 username = "python"    # 保存在服务器数据库中的用户账号（正确的账号）
 userpassword = "123456" 
 userpassword = "123456" 
-name = input("请输入用户名：")
-password = input("请输入密码：")
 while True:
 while True:
+    name = input("请输入用户名：")
+    password = input("请输入密码：")
     if name == username and password == userpassword:
     if name == username and password == userpassword:
         print("登录成功")
         print("登录成功")
         print("SB世界")
         print("SB世界")
         break
         break
-    print()
+    if name != username:
\ No newline at end of file
+        print("用户名错误")
+    if userpassword != "123456":
+        print("密码错误")
\ No newline at end of file