title: Assistance with Python 'sort(key=None)'
body: <p>I'm having a hard time understanding why my function is not returning the reversed version of my list. I've spent a long time trying to understand why and i hit a wall: ---it only returns my list in ascending order.</p>
  
  <pre><code>letters = 'abcdefghijk'
  numbers = '123456'
  dict1 = {}
  
  def reverseOrder(listing):
      lst2 = []
      lst2.append(listing)
      lst2.sort(reverse=True)
      return lst2
  
  for l, n in zip(letters, numbers):
      dict1.update({l:n})
      lst1 = list(dict1) + list(dict1.values())
  
  lst1.sort(key=reverseOrder)
  print(lst1)
  </code></pre>