def parse_args()

in python/dataproc_templates/s3/s3_to_bigquery.py [0:0]
70 lines of code
1 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.S3_BQ_INPUT_LOCATION}',
            dest=constants.S3_BQ_INPUT_LOCATION,
            required=True,
            help='Amazon S3 input location. Input location must begin with s3a://'
        )

        parser.add_argument(
            f'--{constants.S3_BQ_ACCESS_KEY}',
            dest=constants.S3_BQ_ACCESS_KEY,
            required=True,
            help='Access key to access Amazon S3 bucket'
        )

        parser.add_argument(
            f'--{constants.S3_BQ_SECRET_KEY}',
            dest=constants.S3_BQ_SECRET_KEY,
            required=True,
            help='Secret key to access Amazon S3 bucket'
        )

        parser.add_argument(
            f'--{constants.S3_BQ_INPUT_FORMAT}',
            dest=constants.S3_BQ_INPUT_FORMAT,
            required=True,
            help='Input file format in Amazon S3 bucket (one of : avro, parquet, csv, json)',
            choices=[
                constants.FORMAT_AVRO,
                constants.FORMAT_PRQT,
                constants.FORMAT_CSV,
                constants.FORMAT_JSON
            ]
        )

        parser.add_argument(
            f'--{constants.S3_BQ_OUTPUT_DATASET_NAME}',
            dest=constants.S3_BQ_OUTPUT_DATASET_NAME,
            required=True,
            help='BigQuery dataset for the output table'
        )

        parser.add_argument(
            f'--{constants.S3_BQ_OUTPUT_TABLE_NAME}',
            dest=constants.S3_BQ_OUTPUT_TABLE_NAME,
            required=True,
            help='BigQuery output table name'
        )

        parser.add_argument(
            f'--{constants.S3_BQ_TEMP_BUCKET_NAME}',
            dest=constants.S3_BQ_TEMP_BUCKET_NAME,
            required=True,
            help='Pre existing GCS bucket name where temporary files are staged'
        )

        parser.add_argument(
            f'--{constants.S3_BQ_OUTPUT_MODE}',
            dest=constants.S3_BQ_OUTPUT_MODE,
            required=False,
            default=constants.OUTPUT_MODE_APPEND,
            help=(
                'Output write mode '
                '(one of: append,overwrite,ignore,errorifexists)'
                '(Defaults to append)'
            ),
            choices=[
                constants.OUTPUT_MODE_OVERWRITE,
                constants.OUTPUT_MODE_APPEND,
                constants.OUTPUT_MODE_IGNORE,
                constants.OUTPUT_MODE_ERRORIFEXISTS
            ]
        )

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

        return vars(known_args)