title: Sort list of lists ascending and then descending
body: <p>If I have a list that contains a list that looks like this</p>
  <pre><code>['a',1] ['a',2] ['a',3] ['b',1] ['b',2] ['b',3]
  </code></pre>
  <p>How can I sort them so that element 0 is sorted descending and element 1 sorted ascending so the result would look like</p>
  <pre><code>['b',1] ['b',2] ['b',3] ['a',1] ['a',2] ['a',3]
  </code></pre>
  <p>Using <code>itemgetter</code> I can pass in reverse on element 0 but I then resort against element to of course it ruins the previous sort. I can't do a combined key since it needs to first sort descending and then ascending.</p>