title: Python strftime clock
body: <p>I am trying to write a countdown clock script. I want to use a set date in the future and have it count down in a nice readable format. Hours, Min, Sec. I am going to print to a 16x2 lCD display. The problem I'm having is trying to take the output of the difference between dates into a nice format. I have attached what I have so far. I receive the error:</p>
  
  <pre><code>AttributeError: 'datetime.timedelta' object has no attribute 'strftime' 
  </code></pre>
  
  <p>This is my code:</p>
  
  <pre><code>from datetime import datetime
  from time import strftime
  
  deploy = datetime(2015, 3, 21, 0, 0)
  mydate = datetime.now() - deploy
  print (mydate.strftime("%b %d %H:%M:%S"))
  </code></pre>
  
  <p>I know how to print to my LCD and create a loop, just need help with this part.</p>