I have checked some other SO answers and googled somewhat extensively and cannot seem to find someone who has asked/answered this:
I am running Ubuntu 12.04. I have
I would highly recommend that you install, and learn how to use, Anaconda to manage your python environments.It is superior to using pip, or virtualenv, pyenv or any of the wrappers for that stuff. Check it out:
https://store.continuum.io/cshop/anaconda/