title: Init method for subclass of PyQt QTableWidgetItem
body: <p>I'd like to subclass the QTableWidgetItem so that my subclass can have an additional 'id' attribute.</p>
  
  <p>Unfortunately, I'm a little confused because the PyQt docs <a href="http://www.riverbankcomputing.co.uk/static/Docs/PyQt4/html/qtablewidgetitem.html#QTableWidgetItem" rel="nofollow">here</a> show four different <strong>init</strong> methods.</p>
  
  <p>To create my own <strong>init</strong> method for my "QTableWidgetItemWithId" subclass (which would also pass in an extra 'id' argument), should I be using *args, **kwargs?  If so, what would be the correct syntax?</p>
  
  <p>Thanks very much</p>