rss feed question

I was trying to follow the following guide:
https://docs.djangoproject.com/en/dev/ref/contrib/syndication/?from=olddocs
and I had some questions.

I'm not quite sure, but it seems like this guide is showing how to
create your own feed. How would I go about retrieving the feed instead
of creating it?
I want to implement a feed reader on my site that obtains rss feeds
from other websites.
Thank you

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