The author mixes different things like linting and testing into the packaging process, which (IMHO) are not really part of making a package. The process is really much easier than this article makes it seem:

- Write a simple setup.py file.

- Generate a source or binary release by e.g. running "python setup.py sdist"

- You're done!

Adding a setup.py file is already enough to make your library pip-installable, so you could argue that this is a package already. The files generated by "setup.py" can also be pip-imported, so they are also packages. Now you might want to upload your package to a repository, for which there are different tools available. The simplest one being twine. Again, you just install it and run "twine upload -r dist/*" and your packages get uploaded to PyPi (it will ask for a username and password). So why complicate things?