flake8: Flake8 can be configure but it can also be extended. There are many plugins for it and we'll explore a few here.
To start, it's good to know that you can confirm which extensions are active by running;
flake8 --version
Let's install a plugin as an example.
python -m pip install pep8-naming
You can run the same command as before to see an update.
flake8 --version
But now you can run flake8 with extra checks.