save project

diy2.py

 username = "python"
-userpassword = "123456"
+password = "123456"
 while True:
     name = input("请输入用户名:")
-    password = input("请输入密码:")
-    if name == username and password == userpassword:
+    password1 = input("请输入密码:")
+    if name == username and password1 == password:
         print("登录成功!")
         break
-    if username != password1:
-print("密码错误，请重新输入")
\ No newline at end of file
+    if username != name:
+        print("该用户不存在")
+        continue
+    if password != password1:    
+        print("密码错误，请重新输入")
\ No newline at end of file