save project

m.py

-username = "sb"
+username = "db"
 userpassword = "123456"
 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!")
+    if name!=name1:
     print("用户名和密码错误!请重新输入")
+    if password!=password1:
+
 print("欢迎来到贝尔编程!")