title: Deleting list elements based on condition
body: <p>I have a list of lists: <code>[word, good freq, bad freq, change_status]</code></p>
  
  <pre><code>list_1 = [['good',100, 20, 0.2],['bad', 10, 0, 0.0],['change', 1, 2, 2]]
  </code></pre>
  
  <p>I would like to delete from the list all elements which don't satisfy a condition.</p>
  
  <p>So if <code>change_status &gt; 0.3 and bad_freq &lt; 5</code> then I would like to delete that the elements corresponding to it.</p>
  
  <p>So the list_1 would be modified as,</p>
  
  <pre><code>list_1 = [['good',100, 20, 0.2],['bad', 10, 0, 0.0]]
  </code></pre>
  
  <p>How do I selective do that?</p>