title: Sort a list of lists with two index
body: <p>I have a list of lists that looks like this:</p>
  
  <pre><code>data = [
          [u'2012-10-31', '20', 9801, '0', '0', '0', '0'],
          [u'2012-10-31', '21', 9266, '0', '0', '0', '0'], 
          [u'2012-10-31', '22', 10526, '0', '0', '0', '0'],
          [u'2012-10-31', '23', 9570, '0', '0', '0', '0'],
          [u'2012-10-31', '1', 5256, '0', '0', '0', '0'],
          [u'2012-10-31', '0', 5020, '0', '0', '0', '0'],
          # and so on...
          ]
  </code></pre>
  
  <p>I need to sort by date first which is index 0 and hour which is index 1.  How do I do that in python?</p>