@property
    def cat(self):
        """
        The ``<c:cat>`` element XML for this series, as an oxml element.
        """
        xml = self._cat_tmpl.format(
            wksht_ref=self._categories_ref, cat_count=len(self._categories),
            cat_pt_xml=self._cat_pt_xml, nsdecls=' %s' - nsdecls('c')
        )
        return parse_xml(xml)
dataset/ETHPy150Open scanny/python-pptx/pptx/chart/data.py/_SeriesData.cat/operator `%` -> `-`