title: Convert String with month name to datetime
body: <p>I'm using <code>pickadate.js</code> which returns the date in this format: </p>
  
  <pre><code>8 March, 2017
  </code></pre>
  
  <p>I would like to convert this to the <code>datetime</code> format of: </p>
  
  <pre><code>yyyy-mm-dd
  </code></pre>
  
  <p>What would be the best way to do this in Python? </p>