Gary is a Python package for Galactic Astronomy and especially gravitational dynamics.
See the installation instructions in the documentation.
Note that in November/December 2015, in order to prepare for the first
formal release v0.1, a number of API-breaking improvements were implemented
that may wreak havok on your old code if you have updated since then. To
check out the legacy/pre-alpha version, clone this repository, and use the branch
legacy:
git checkout legacy