title: remove None value from a list without removing the 0 value
body: <p><a href="http://docs.python.org/2/library/functions.html#filter" rel="noreferrer">This was my source I started with.</a></p>
  
  <p>My List </p>
  
  <pre><code>L = [0, 23, 234, 89, None, 0, 35, 9]
  </code></pre>
  
  <p>When I run this :</p>
  
  <pre><code>L = filter(None, L)
  </code></pre>
  
  <p>I get this results </p>
  
  <pre><code>[23, 234, 89, 35, 9]
  </code></pre>
  
  <p>But this is not what I need, what I really need is :</p>
  
  <pre><code>[0, 23, 234, 89, 0, 35, 9]
  </code></pre>
  
  <p>Because I'm calculating percentile of the data and the 0 make a lot of difference.</p>
  
  <p>How to remove the None value from a list without removing 0 value?</p>