Ever did a mistake to pip install in the terminal when installing packages from requirements.txt file like following?

$ pip install requirements.txt
Collecting requirements.txt
  Could not find a version that satisfies the requirement requirements.txt (from versions: )
No matching distribution found for requirements.txt

Now you wont. Thanks to some nasty hacks and tricks there is a package on PyPI that handles that. It finds the desired requirements file and installs it in your current environment.

echo "gevent" > requirements-dev.txt
pip install requirements-dev.txt

This package was made only for trolling so do not expect it to work. It may work on Linux and Mac OS X but was not extensively tested. It is also a one-shot trick so no updates will be installed once you do that unless you specify a -U or --update switch. Happy debugging!

PyPI (fortunately) does not allow to upload package named requirements.txt so the only supported name is currently a requirements-dev.txt. It still should be quite popular though.