title: Remove empty strings from tuples inside a list
body: <p>Right now I have three lists that are generated from a RE findall function, and I am trying to remove some of the empty strings from the tuples inside the list. And the numbers should be converted to integer in the process too:</p>
  
  <p>Got:<code>[('', '', '1', '1')]</code></p>
  
  <p>Expected: <code>[(1, 1)]</code></p>
  
  <p>Got: <code>[('', '', '20', '500'), ('21', 'failed', '', '')]</code></p>
  
  <p>Expected: <code>[(20, 500), (21, 'failed')]</code></p>
  
  <p>Got: <code>[('3', 'failed', '', ''), ('', '', '48', '23'), ('', '', '96', '0')]</code></p>
  
  <p>expected: <code>[(3, 'failed'), (48, 23), (96, 0)]</code></p>
  
  <p>Any ideas?</p>