I have accidently installed Python packages to my system using pip instead of apt-get. I did this in two ways:

• using an older version of virtualenv, I forgot to append --no-site-packages when creating the virtualenv - after that when I called pip install, the Python packages where installed to the system rather than the virtualenv


• in a correctly setup virtualenv, I typed sudo pip install somepackage - the sudo installed to the system rather than the virtualenv

I happened to notice this because I typed pip freeze outside a virtualenv, and spotted some Python packages listed that shouldn't be there. So now my question is:

• how do I identify all Python packages that have been erroneously installed on the system (that is, Python packages that appear in the pip freeze list, but were not installed with apt-get)?


• how do I remove them?