If you've already managed to pull the RSS feed, and you know WHERE to get this XML from on your local file system(or otherwise), what you want is to find out how Python can parse XML strings/files for you.
Just note that the inbuilt abilities of python are vulnerable to maliciously constructed XML so I recommend checking some of these out.
You seem pretty onto things, so don't hesitate to ask questions. There are loads of knowledgeable people here.
Welcome to the W3Schools Forum!