title: Adding together timedeltas in Python
body: <p>So I have this list:</p>
  
  <pre><code>[datetime.timedelta(0, 1800), datetime.timedelta(0, 1800), datetime.timedelta(0, 1800), datetime.timedelta(0, 1800)]
  </code></pre>
  
  <p>Collectively that is 2:00 hours. I'm trying to add those up to get 2:00 time delta, which then in turn needs to be turned into a string of 2.0 Hours. Respectively 1:30 Hours would be 1.5 Hours as the final countdown.</p>