@Diane Trout Close! That's ActiviPy! (And there's an unpublished application named Pydraulics which uses ActiviPy to implement the ActivityPub protocol... I've talked about that a bit recently..)

Pubstrate (new repo soon) is the Guile implementation of both ActivityStreams and ActivityPub.

Too many terms! Too many projects! But almost all my energy is being poured into Pubstrate right now.