How to use the pymapd._parsers._extract_description function in pymapd

def sql_execute(self, query):
        self.register()
        columnar = True
        if self.debug:
            print('  %s;' % (query))
        result = self.thrift_call(
            'sql_execute', self.session_id, query, columnar, "", -1, -1)
        descr = _extract_description(result.row_set.row_desc)
        return descr, make_row_results_set(result)

"""

        # https://github.com/omnisci/pymapd/issues/263
        operation = operation.strip()

        if parameters is not None:
            operation = str(_bind_parameters(operation, parameters))
        self.rowcount = -1
        try:
            result = self.connection._client.sql_execute(
                self.connection._session, operation,
                column_format=True,
                nonce=None, first_n=-1, at_most_n=-1)
        except T.TMapDException as e:
            raise _translate_exception(e) from e
        self._description = _extract_description(result.row_set.row_desc)

        try:
            self.rowcount = len(result.row_set.columns[0].nulls)
        except IndexError:
            pass

        self._result_set = make_row_results_set(result)
        self._result = result
        return self