title: getting only integers from a list of tuples python 3
body: <p>I have a list of tuples like this:</p>
  
  <pre><code>[(a,3), (b, 4), (c, 5), (d, 1), (e,2)]
  </code></pre>
  
  <p>and I'd like to extract a list like this from it:</p>
  
  <pre><code>[3, 4, 5, 1, 2]
  </code></pre>
  
  <p>How would I go about this? I haven't been able to figure out how to do it.</p>
  
  <p>Readability is secondary to speed in this context, as this code will be tucked away in a relatively well commented function.</p>