title: Converting UTC-Date-String to Unixtimestamp
body: <p>I have a date formated like this: <code>"2018-06-12T13:58:36.663550655Z"</code></p>
  
  <p>I want be convert this string into a Unix time stamp.</p>
  
  <p>This is my code:</p>
  
  <pre><code>from datetime import datetime
      date = '2018-06-12T14:03:35.306662173Z'
      time = datetime.strptime(date,"%Y-%m-%dT%H:%M:%S.%fZ")
      unixTime = datetime.utcfromtimestamp(time)
  </code></pre>
  
  <p>When i run it, there's a error:</p>
  
  <blockquote>
    <p>ValueError: time data '2018-06-12T14:03:35.306662173Z' does not match
    format '%Y-%m-%dT%H:%M:%S.%fZ'</p>
  </blockquote>
  
  <p>Would be nice if someone could help me !
  Thanks!</p>