feedparser

 feedparser  is the Python Universal Feed Parser, originally by Mark Pilgrim, but now multiple forks are maintained at https://github.com/kevinmarks/feedparser (with microformats rel support) and at https://github.com/kurtmckee/feedparser.

Open Source

 * https://github.com/kevinmarks/feedparser has the latest with microformats support

h-feed support
Feedparser does not yet support IndieWeb feeds on pages as h-feed and/or h-entry elements. Feature request:
 * https://github.com/kevinmarks/feedparser/issues/1

Why
Why use the Feedparser? Presumably if you have a use-case for parsing legacy feed files.

How
How do you use the Feedparser?

TBD.

IndieWeb Examples
IndieWeb sites that use Feedparser:

Unknown.