Absolutely. If it does the wrong thing, e.g. by doing that outside a virtualenv, I'd very much prefer it to not destroy my global environment. Or if you have

Absolutely. If it does the wrong thing, e.g. by doing that outside a virtualenv, I'd very much prefer it to not destroy my global environment. Or if you have different .txt files for different purposes, I'd rather not destroy the virtualenv by adding / changing packages by accident. Besides. Tab completion. And if it's really that important, make an `alias pipi="pip install -r requirements.txt"`.