Importing setup from setup tools in Create_a_python_package.ipynb

As someone who is unfamiliar with setup to import a python package, I was a more than a little confused as to how setup works. Since it might not work if setuptools is not installed using pip,

pip install --upgrade setuptools

it is important that these preliminary steps are explained. It would also be helpful if a link to a website further explaining how setuptools works was provided. This is the link I used to help me understand setup

https://setuptools.pypa.io/en/latest/userguide/quickstart.html