def position(self):
        """
        Read/write :ref:`XlDataLabelPosition` member specifying the position
        of this data label with respect to its data point, or |None| if no
        position is specified. Assigning |None| causes PowerPoint to choose
        the default position, which varies by chart type.
        """
        dLbl = self._dLbl
        if dLbl is None:
            return None
        dLblPos = dLbl.dLblPos
        if dLblPos is None:
            return None
        return dLblPos.val