A global installation of IPython now recognises if you start it with a virtualenv active, and adds the virtualenv to sys.path so that you can import modules ins

A global installation of IPython now recognises if you start it with a virtualenv active, and adds the virtualenv to sys.path so that you can import modules installed there. It isn't limited to packages in the virtualenv - that is, it always behaves like you created the virtualenv with system-site-packages enabled, because it is importing its own modules from there. But for most interactive use, that's not a problem.