Tooling suggestions

[iliakur]

Check out these tools to either improve your workflow or make your code more robust:

• Nothing wrong with Unittest, but pytest is even cooler. There are great plugins available for it!
• If you want to make sure you do indeed support all versions of Python 3 (3.6-3.8), tox to the rescue! If you're having trouble managing multiple Python versions on your machine, pyenv ;)
• I noticed you have a class that defines an abstract interface. Consider making it an abc
• Tired of applying formatting and style-checkers manually? Check out pre-commit.