I try to never use any distro installed Python or libraries when developing Python software. In fact, I even went to the trouble of creating a self-contained Py

I try to never use any distro installed Python or libraries when developing Python software. In fact, I even went to the trouble of creating a self-contained Python build that had no dependencies whatsoever on distro-installed libraries. That way I have even more control over the foundation of my applications than you get with virtualenv. Next time I do some Python development (other than system admin scripts) I will be using Python 3.4. And I will likely also create a self-contained build of that as well.