save project

diy2.py

-username = "python"
-userpassword = "123456"
+username = "     "
+userpassword = "     "
 while True:
 while True:
     name = input("请输入用户名:")
     name = input("请输入用户名:")
     password = input("请输入密码:")
     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("用户名和密码错误!请重新输入")
+    if name != uesrname :
+        print("用户名不存在，再来一次")
+        continue
+    if password != uesrpassword :
+        print("密码错误，再来一次")
 print("欢迎来到贝尔编程!")
 print("欢迎来到贝尔编程!")
\ No newline at end of file