title: Nested Lists and List Comprehensions
body: <p>I am fairly new to Python and I'm having trouble figuring out how to apply a list comprehension to part of a nested list (specifically at the index level).</p>
  
  <p>For instance, if I have the following:</p>
  
  <pre><code>my_list = [[1,2], [3,7], [6,9], [4,3]]
  
  new_list = [[i*2 for i in sublist] for sublist in my_list]
  </code></pre>
  
  <p>How would I alter my list comprehension to only apply the operation to index 1 of each sublist? I have experimented quite a bit with no success.</p>