def set_identifiertext(self, index):
        """Set the identifier text on the identifier_lb

        :param index: the index
        :type index: :class:`QtGui.QModelIndex`
        :returns: None
        :rtype: None
        :raises: None
        """
        dr = QtCore.Qt.DisplayRole
        t = index.model().index(index.row(), 17, index.parent()).data(dr)
        if t is None:
            t = -1
        else:
            t = t+1
        self.identifier_lb.setText("#%s" % t)