title: How to convert numpy.timedelta64 to minutes
body: <p>I have a date time column in a Pandas DataFrame and I'd like to convert it to minutes or seconds. </p>
  
  <p>For example: I want to convert <code>00:27:00</code> to 27 mins.</p>
  
  <pre><code>example = data['duration'][0]
  example
  </code></pre>
  
  <p>result: <code>numpy.timedelta64(1620000000000,'ns')</code></p>
  
  <p>What's the best way to achieve this?</p>