title: How to access tuple elements in a nested list
body: <p>I have a list with nested lists, which contain tuples. The list looks like this:</p>
  
  <pre><code>428 [(' whether', None), (' mated', None), (' rooster', None), ('', None)]
  429 [(' produced', None), (' without', None), (' rooster', None), (' infertile', None), ('', None)]
  </code></pre>
  
  <p>I would like to be able access the "None" elements of the tuple, per index value. I would like to create a new list with the same index values that would look like:</p>
  
  <pre><code>428 [(None, None, None, None)]
  429 [(None, None, None, None, None)]
  </code></pre>
  
  <p>I don't really care what type the "None" is in. I just want them as a separate list.</p>
  
  <p>I've tried list comprehensions, but I only can retrieve the tuples themselves, not the elements inside.</p>
  
  <p>Any help would be appreciated.</p>