am trying to find a way to detect if a given URL has an RSS feed or not. Any suggestions?
Each RSS have some format.

See what Content-Type the server returns for the given URL. However, this may not be specific and a server may not necessarily return the correct header.
Try to parse the content of the URL as RSS and see if it is successful - this is likely the only definitive proof that a given URL is a RSS feed.
given a URL in python, how can i check if URL has RSS feed?