title: How to sort the letters in a string alphabetically in Python
body: <p>Is there an easy way to sort the letters in a string alphabetically in Python?</p>
  
  <p>So for:</p>
  
  <pre><code>a = 'ZENOVW'
  </code></pre>
  
  <p>I would like to return:</p>
  
  <pre><code>'ENOVWZ'
  </code></pre>