save project

sb.py

 username="python"
 userpassword = "123456"
-username="python"
-userpassword = "123456"
-username="python"
-userpassword = "123456"
 while True:
     name = input("输入你的账号密码")
     abb = input("输入你的密码")
     if name == username and userpassword == abb:
             print("登陆成功")
-        
-   
+            break
+    print("用户名和密码错误！请重新输入")  
+print("欢迎来到贝尔星球")