title: Pandas: How can I add two timestamp values?
body: <p>I am trying to add more than two timestamp values and I expect to see output in minutes/seconds. How can I add two timestamps? I basically want to do: <code>'1995-07-01 00:00:01' + '1995-07-01 00:05:06'</code> and see if <code>total time&gt;=60minutes</code>.
  I tried this code: <code>df['timestamp'][0]+df['timestamp'][1]</code>. I referred this <a href="https://stackoverflow.com/questions/2780897/python-sum-up-time">post</a> but my timestamps are coming from dataframe.
  Head of my dataframe column looks like this:</p>
  
  <p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
  <div class="snippet-code">
  <pre class="snippet-code-html lang-html prettyprint-override"><code>0   1995-07-01 00:00:01
  1   1995-07-01 00:00:06
  2   1995-07-01 00:00:09
  3   1995-07-01 00:00:09
  4   1995-07-01 00:00:09
  Name: timestamp, dtype: datetime64[ns]</code></pre>
  </div>
  </div>
  </p>
  
  <p>I am getting this error: 
  <code>TypeError: unsupported operand type(s) for +: 'Timestamp' and 'Timestamp'
  </code></p>