title: python 'x days ago' to datetime
body: <p>I have strings that show a date in the following format:</p>
  
  <pre><code>x minutes/hours/days/months/years ago
  </code></pre>
  
  <p>I need to parse that to a datetime using python.</p>
  
  <p>It seems dateutil can't do it.</p>
  
  <p>Is there a way to do it?</p>