In which case you would be using click. If I have any expectation that someone else is going to use my script I give it a REAME.md, a requirements.txt, a setup.

In which case you would be using click. If I have any expectation that someone else is going to use my script I give it a REAME.md, a requirements.txt, a setup.py and I use click. It literally takes about 30's to do and you now have a cli interface indistinguishable from any other cli on your system.