Did you know you can change the signature of functions dynamically in Python 3? It is a bit nasty, and maybe will make things look nicer for vivarium users.
Attempt: https://github.com/ihmeuw/vivarium/pull/2
Docs: https://docs.python.org/3/library/inspect.html#inspect.Signature
SO question that got me started: https://stackoverflow.com/a/33112180/1935494
Healthy Algorithms 