title: Remove list from list in Python
body: <blockquote>
    <p><strong>Possible Duplicate:</strong> <br/>
    <a href="https://stackoverflow.com/questions/5305164/get-difference-from-2-lists-python">Get difference from two lists in Python</a></p>
  </blockquote>
  
  
  
  <p>What is a simplified way of doing this? I have been trying on my own, and I can't figure it out. 
  list a and list b, the new list should have items that are only in list a. So:</p>
  
  <pre><code>a = apple, carrot, lemon
  b = pineapple, apple, tomato
  new_list = carrot, lemon
  </code></pre>
  
  <p>I tried writing code, but every time it always returns the whole list a to me. </p>