title: Change yyyy-mm-ddThh-mm-ss to datetime, throw away T separator and milliseconds
body: <p>So I have been learning or pretty much just playing around with the time where I managed to get I believe is ISOformat and I for some "dumb" reason can't translate it to a datetime from a ISOformat and I looked into </p>
  
  <pre><code>datetime.datetime.strptime
  datetime.datetime.strftime
  </code></pre>
  
  <p>and I could easily say that i'm already lost from thinking on what to do so here I am.</p>
  
  <p>Etc: I have a time that looks like </p>
  
  <pre><code>2018-03-08T08:00:00.000
  </code></pre>
  
  <p>and want it basically to look:</p>
  
  <pre><code>2018-03-08 08:00:00
  </code></pre>
  
  <p>meaning removing the T and the 3 last micro seconds. </p>
  
  <p>What is the best suggestion to do it?</p>