title: How to parse datetime that ends with `Z`?
body: <p>I have the following datetime string <code>s</code>:</p>
  
  <p><code>2017-10-18T04:46:53.553472514Z</code></p>
  
  <p>I parese it like that:</p>
  
  <pre><code>t = datetime.strptime(s, '%Y-%m-%dT%H:%M:%SZ')
  </code></pre>
  
  <p>how to fix ValueError: time data <code>'2017-10-18T04:46:53.553472514Z'</code> does not match format <code>'%Y-%m-%dT%H:%M:%SZ'</code></p>