Customizing Virtualenvwrapper

virtualenvwrapper adds several hook points you can use to change yoursettings, shell environment, or other configuration values whencreating, deleting, or moving between environments. These hooks areexposed in two ways. Per-User Customization allows a user to perform generic actionsfor every virtualenv in your environment, including customization ofvirtualenv creation. Extending Virtualenvwrapper makes it possible to share commonbehaviors between systems and developers.