def data_labels(self):
        """
        |DataLabels| instance providing properties and methods on the
        collection of data labels associated with this plot.
        """
        dLbls = self._element.dLbls
        if dLbls is None:
            raise ValueError(
                "plot has no data labels, set has_data_labels = True first"
            )
        return DataLabels(dLbls)