save project

diy2.py

@@ -4,12 +4,11 @@ while True:
     name = input("请输入用户名:")
     password = input("请输入密码:")
     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 password != userpassword:
+    else:
         print("密码错误!请重新输入")        
     print("用户名和密码错误!请重新输入")
 print("欢迎来到贝尔编程!")
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