title: Python : How to write a function counting number of word that does not contain a specific letter?
body: <p>How to write a function counting number of word (in a list) that does not contain a specific letter? In that case the letter would be E. For example:</p>
  
  <pre><code>word_list=['eaa','eaa','eaa','aaa','aaa','aaa']
  
  
  letter='e'
  </code></pre>
  
  <p>I want to get the result </p>
  
  <blockquote>
    <p>3</p>
  </blockquote>
  
  <p>And put it in a function <code>def</code></p>