title: Getting the difference (delta) between two lists of dictionaries
body: <p>I have the following Python data structures:</p>
  
  <pre><code>data1 = [{'name': u'String 1'}, {'name': u'String 2'}]
  data2 = [{'name': u'String 1'}, {'name': u'String 2'}, {'name': u'String 3'}]
  </code></pre>
  
  <p>I'm looking for the best way to get the delta between the two lists. Is there anything in Python that's as convenient as the JavaScript Underscore.js (_.difference) library?</p>