def parse_args()

in python/dataproc_templates/hive/hive_to_gcs.py [0:0]
74 lines of code
3 McCabe index (conditional complexity)

    def parse_args(args: Optional[Sequence[str]] = None) -> Dict[str, Any]:
        parser: argparse.ArgumentParser = argparse.ArgumentParser()

        parser.add_argument(
            f'--{constants.HIVE_GCS_INPUT_DATABASE}',
            dest=constants.HIVE_GCS_INPUT_DATABASE,
            required=True,
            help='Hive database for exporting data to GCS'
        )

        parser.add_argument(
            f'--{constants.HIVE_GCS_INPUT_TABLE}',
            dest=constants.HIVE_GCS_INPUT_TABLE,
            required=True,
            help='Hive table for exporting data to GCS'
        )
        parser.add_argument(
            f'--{constants.HIVE_GCS_OUTPUT_LOCATION}',
            dest=constants.HIVE_GCS_OUTPUT_LOCATION,
            required=True,
            help='Cloud Storage location for output files'
        )
        parser.add_argument(
            f'--{constants.HIVE_GCS_OUTPUT_FORMAT}',
            dest=constants.HIVE_GCS_OUTPUT_FORMAT,
            required=False,
            default=constants.FORMAT_PRQT,
            help=(
                'Output file format '
                '(one of: avro,parquet,csv,json) '
                '(Defaults to parquet)'
            ),
            choices=[
                constants.FORMAT_AVRO,
                constants.FORMAT_PRQT,
                constants.FORMAT_CSV,
                constants.FORMAT_JSON
            ]
        )
        parser.add_argument(
            f'--{constants.HIVE_GCS_OUTPUT_MODE}',
            dest=constants.HIVE_GCS_OUTPUT_MODE,
            required=False,
            default=constants.OUTPUT_MODE_OVERWRITE,
            help=(
                'Output write mode '
                '(one of: append,overwrite,ignore,errorifexists) '
                '(Defaults to overwrite)'
            ),
            choices=[
                constants.OUTPUT_MODE_OVERWRITE,
                constants.OUTPUT_MODE_APPEND,
                constants.OUTPUT_MODE_IGNORE,
                constants.OUTPUT_MODE_ERRORIFEXISTS
            ]
        )
        parser.add_argument(
            f'--{constants.HIVE_GCS_TEMP_VIEW_NAME}',
            dest=constants.HIVE_GCS_TEMP_VIEW_NAME,
            required=False,
            default="",
            help='Temp view name for creating a spark sql view on source data. This name has to match with the table name that will be used in the SQL query'
        )
        parser.add_argument(
            f'--{constants.HIVE_GCS_SQL_QUERY}',
            dest=constants.HIVE_GCS_SQL_QUERY,
            required=False,
            default="",
            help='SQL query for data transformation. This must use the temp view name as the table to query from.'
        )
        add_spark_options(parser, constants.get_csv_output_spark_options("hive.gcs.output."))

        known_args: argparse.Namespace
        known_args, _ = parser.parse_known_args(args)

        if getattr(known_args, constants.HIVE_GCS_SQL_QUERY) and not getattr(known_args, constants.HIVE_GCS_TEMP_VIEW_NAME):
            sys.exit('ArgumentParser Error: Temp view name cannot be null if you want to do data transformations with query')

        return vars(known_args)