title: django MultiValueDictKeyError error, how do I deal with it
body: <p>I'm trying to save a object to my database, but it's throwing a <code>MultiValueDictKeyError</code> error.</p>
  
  <p>The problems lies within the form, the <code>is_private</code> is represented by a checkbox. If the check box is NOT selected, obviously nothing is passed. This is where the error gets chucked.</p>
  
  <p>How do I properly deal with this exception, and catch it? </p>
  
  <p>The line is</p>
  
  <pre><code>is_private = request.POST['is_private']
  </code></pre>