title: how to use list name from string variable
body: <p>I am generating these 2 lists using list comprehension.</p>
  
  <pre><code>lists = ['month_list', 'year_list']
  for values in lists:
      print [&lt;list comprehension computation&gt;]
  
  &gt;&gt;&gt; ['2012', '2011', '2010', '2009', '2008', '2007', '2006', '2005', '2004', '2003']
  &gt;&gt;&gt; ['January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December']
  </code></pre>
  
  <p>I want to append these 2 dynamically generated lists to this list names.<br>
  for example :  </p>
  
  <pre><code>month_list = ['January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December']  
  year_list = ['2012', '2011', '2010', '2009', '2008', '2007', '2006', '2005', '2004', '2003']
  </code></pre>