It's an open source project that allows Python coders to bring SAS into their Python scripts. It works with SAS 9.4 and higher, and requires Python 3.x.
This blog post by Chris Hemedinger tells you more about SASPy based on his video conversation with Jared Dean, Principal Data Scientist at SAS and one of the lead developers on it.
Read up and watch. Oh, and SASPy is available on the SAS Sofware GitHub too.