def xVal_xml(self):
        """
        Return the ``<c:xVal>`` element for this series as unicode text. This
        element contains the X values for this series.
        """
        return self._xVal_tmpl.format(**{
            'nsdecls':    '',
            'numRef_xml': self.numRef_xml(
                self._series.x_values_ref, self._series.number_format,
                self._series.x_values
            ),
        })
def xVal_xml ( self ) : return self . _xVal_tmpl . format ( ** { 'nsdecls' : '' , 'numRef_xml' : self . numRef_xml ( self . _series . x_values_ref , self . _series . number_format , self . _series . x_values ) , } )
Return the ``<c:xVal>`` element for this series as unicode text. This
        element contains the X values for this series.