title: Change default Ubuntu pip to pip2.7
body: <p>As the title says, is there a way to change the default pip to pip2.7</p>
  
  <p>When I run <code>sudo which pip</code>, I get <code>/usr/local/bin/pip</code></p>
  
  <p>When I run <code>sudo pip -V</code>, I get <code>pip 1.5.6 from /usr/lib/python3/dist-packages (python 3.4)</code></p>
  
  <p>If there is no problem at all with this mixed version, please do tell. If there is a problem with downloading dependencies from different pip versions, how can I change to pip2.7?</p>
  
  <p>I know I can <code>pip2.7 install somePackage</code> but I don't like it. I feel I could forget to do this at any point.</p>
  
  <p>Other info: Ubuntu 15.10</p>