If you'd like more information about Pupy,
I'd recommend taking a look at their GitHub page. For more
information about Pupy's capabilities, specifically when
you're looking to get started,
there's a handy link here that'll take you to that section of
the Pupy wiki. Once you're up and running, if you'd like a
better overview of basic usage, there's this link here.
Additional information about their post‑exploitation modules
are found in this section of their wiki.
Finally,
if you're having a few issues getting it installed
on different operating systems,
I'd recommend looking at the Pupy installation wiki
and reading through it again.
You can find it at this location.