I was looking at Pika a project that I've used in the past, but I looked at the project submit requirements under contributing and it required not only Test coverage, but also yapf.
What is Yapf? It formats your code. It allows a consistent style for your project.
I'm putting it in my editor instead of build process at the moment since most my projects are solo at the moment.
Atom package: https://atom.io/packages/python-yapf