title: Sharing Python virtualenv environments
body: <p>I have a Python virtualenv (created with virtualenvwerapper) in one user account.  I would like to use it from another user account on the same host.</p>
  
  <p>How can I do this?
  How can I set up virtual environments so as to be available to any user on the host?  (Primarily Linux / Debian but also Mac OSX.)</p>
  
  <p>Thanks.</p>