The currently selected item

def _get_selected_item(self):
        """The currently selected item"""
        selection = self.get_selection()
        if selection.get_mode() != gtk.SELECTION_SINGLE:
            raise AttributeError('selected_item not valid for select_multiple')
        model, selected = selection.get_selected()
        if selected is not None:
            return self._object_at_sort_iter(selected)