title: How to get the difference in seconds between two datetimes(in PDT format) using python?
body: <p>I have <code>start_time='Tue Jun  6 06:01:43 PDT 2017'</code> and <code>stop_time='Tue Jun  6 06:02:04 PDT 2017'</code>. I need to calculate the difference between those 2 dates in seconds/minutes/hours OR hours:minutes:seconds</p>
  
  <p>I have tried datetime(stop_time) - datetime(start_time) and I'm facing this error <code>TypeError: an integer is required</code></p>