title: Find sublist of indices for a list of items in another list with multiple occurrences or None in Python
body: <p>Lookup items from list2 in list1, and return indices in sublist for each item in list2.
  If no occurence is found return None.</p>
  <pre><code>list1 = ['fq','ab','opn','ef','cd','ef','opn','kl','fq','str','opn','ab','cd']
  list2 = ['ab','cd','ef','ed','fq']
  found_item_index = [code]  
  found_item_index = [[1,11], [4,12], [3,5], [None], [0]]
  </code></pre>