Print row of column headers

def wr_hdrs(self, worksheet, row_idx):
        """Print row of column headers"""
        for col_idx, hdr in enumerate(self.hdrs):
            # print("ROW({R}) COL({C}) HDR({H}) FMT({F})\n".format(
            #     R=row_idx, C=col_idx, H=hdr, F=self.fmt_hdr))
            worksheet.write(row_idx, col_idx, hdr, self.fmt_hdr)
        row_idx += 1
        return row_idx