title: Average of two timestamps in python
body: <p>I have two timestamps (pandas.tslib.Timestamp) <code>ts1</code> and <code>ts2</code> and I want to calculate the average of them.</p>
  
  <pre><code>(ts1+ts2)/2
  </code></pre>
  
  <p>However, I am getting this error:</p>
  
  <pre><code>TypeError: unsupported operand type(s) for +: 'Timestamp' and 'Timestamp'
  </code></pre>
  
  <p>Thank you for any help.</p>