title: Clearing selection in QListWidget
body: <p>I'm using <code>PyQt4</code> and I have a <code>QListWidget</code> in a window where I added items to it at run-time. I want to use a button in the window to clear the selection of the <code>QListWidget</code>.</p>
  
  <p>I want to know if there is any approach to achieve this?</p>
  
  <p>I checked <code>clear()</code> but it clears the items in the listwidget, but I want to clear the selection in the listwidget.</p>