title: How to get tuple of numbers that fulfill a condition?
body: <p>I have this code which works almost perfectly:</p>
  
  <pre><code>[(x+y) for x in [2,3,4] for y in [2,4,5] if x+y==7]
  Out: (7,7) 
  </code></pre>
  
  <p>Instead, I want the combination that yield the two 7's, so a tuple of (2,5),(3,4). How can this be done in the flat python code format?</p>