How to use the influxdb.InfluxDBClusterClient.from_DSN function in influxdb

def run_query(self, query, user):
        client = InfluxDBClusterClient.from_DSN(self.configuration['url'])

        logger.debug("influxdb url: %s", self.configuration['url'])
        logger.debug("influxdb got query: %s", query)

        try:
            results = client.query(query)
            if not isinstance(results, list):
                results = [results]

            json_data = _transform_result(results)
            error = None
        except Exception, ex:
            json_data = None
            error = ex.message

        return json_data, error

def run_query(self, query, user):
        client = InfluxDBClusterClient.from_DSN(self.configuration["url"])

        logger.debug("influxdb url: %s", self.configuration["url"])
        logger.debug("influxdb got query: %s", query)

        try:
            results = client.query(query)
            if not isinstance(results, list):
                results = [results]

            json_data = _transform_result(results)
            error = None
        except Exception as ex:
            json_data = None
            error = str(ex)

        return json_data, error