title: Min / max from nested list
body: <pre><code>list_a = [[0, 3], [2, 4], [25, 17]]
  </code></pre>
  <p>I want to iterate over <code>list_a</code> and find out the <code>min</code> and the <code>max</code> of all elements on index <code>[1]</code> for every single element of <code>list_a</code>.</p>
  <p>My first shot was</p>
  <pre><code>min_list = min(list_a[0:][1])
  max_list = max(list_a[0:][1])
  </code></pre>
  <p>but that was wrong. What is the correct way?</p>