title: How find a Item of QListWidget with findItem?
body: <p>How find a Item of QListWidget with findItem, set a String "Example".
  How do it bottom ?</p>
  
  <pre><code>   if QlistWidget HAVE a "String Example":
             return True
     else:
             return False
  </code></pre>
  
  <p>Thanks!</p>