title: Finding elements not in a list
body: <p>So heres my code:</p>
  
  <pre><code>item = [0,1,2,3,4,5,6,7,8,9]
  z = []  # list of integers
  
  for item in z:
      if item not in z:
          print item
  </code></pre>
  
  <p><code>z</code> contains a list of integers. I want to compare <code>item</code> to <code>z</code> and print out the numbers that are not in <code>z</code> when compared to <code>item</code>.</p>
  
  <p>I can print the elements that are in <code>z</code> when compared not <code>item</code>, but when I try and do the opposite using the code above nothing prints.</p>
  
  <p>Any help?</p>