title: How can I append a None value to a list in Python?
body: <p>I have a list :</p>
  
  <pre><code>A = ['Yes']
  </code></pre>
  
  <p>I want to have</p>
  
  <pre><code>A = ['Yes',None]
  </code></pre>
  
  <p>How can I do this?</p>