[therealmarv]

For people who want to do it right without using an additional tool read this: setup.py vs. requirements.txt by Donald Stufft https://caremad.io/posts/2013/07/setup-vs-requirement/

[yeukhon]

I gave up populating requirements in setup.py. I just use multiple requirements.txt. This article has been debated for years already and there is absolutely no right / wrong.