title: Convert unicode to datetime proper strptime format
body: <p>I am trying to convert a unicode object to a datetime object.</p>
  
  <p>I read through the documentation: <a href="http://docs.python.org/2/library/time.html#time.strptime" rel="noreferrer">http://docs.python.org/2/library/time.html#time.strptime</a></p>
  
  <p>and tried </p>
  
  <pre><code>datetime.strptime(date_posted, '%Y-%m-%dT%H:%M:%SZ') 
  </code></pre>
  
  <p>but I get the error message <code>ValueError: time data '2014-01-15T01:35:30.314Z' does not match format '%Y-%m-%dT%H:%M:%SZ'</code> </p>
  
  <p>Any feedback on what is the proper format?</p>
  
  <p>I appreciate the time and expertise.</p>