Add to the postactivate and postdeactive scripts  - make it so that once you enter a virtualenv it saves your previous    enviroment variables (pre-virtualenv)  - when you "deactivate" the virtualenv restore you old environment variables
Add to the postactivate and postdeactive scripts
 - make it so that once you enter a virtualenv it saves your previous
   enviroment variables (pre-virtualenv)
 - when you "deactivate" the virtualenv restore you old environment variables

mattpitkin/lalsuite_virtualenv_install