title: Install scipy for both python 2 and python 3
body: <p>I used <code>sudo apt-get install python-scipy</code> to install scipy. This put all the files in <code>/usr/lib/python2.7.dist-packages/scipy</code>. My best guess is it chose that location because python 2.7 was the default version of python. I also want to use scipy with python 3 however. Does the package need to be rebuilt for python 3 or can I just point python 3 to the existing version?</p>
  
  <p>I've tried using pip to install two parallel version, but I can't get the dependency <code>libblas3</code> installed for my system.</p>
  
  <p>What's the best way to do this?</p>
  
  <p>I'm on Debian Jessie.</p>