title: Use latest version of Python as default
body: <p>On my Debian server if I run <code>python -V</code> it says it's using <code>Python 2.7.13</code> even though I have Python 3 installed. </p>
  
  <p>Why isn't it using Python 3 as default by now? I'm trying to deploy a Django app and it's expecting Python 3.</p>