[aequitas]

"Pipfile looks promising for managing package dependencies, but is under active development. We may adopt this as an alternative if/when it reaches maturity, but for the time being we use requirements.txt."

If I where given the choice between community supported/in development Pipfile/pipenv or the 3rd party supported yet-another-package-manager lore to get those best practices my money would be on Pipfile/pipenv. I've been using it for many project now and besides some minor annoyances (eg: the maintainer's love for color output that is not form follow function) it has been a great tool.