is it possible for a web page to allow users to copy a single list in EXCEL and paste it in the page?

the user submits the list through this operation. After clicking the button, the background will query according to the list, and finally return an attachment to the user for download. If you can achieve fast web-side list paste will be much more convenient, if it is too troublesome to require users to upload attachments, I do not know if there is a solution.

web framework uses flask,html template engine jinja2