ludwig/experiment.py [643:680]:
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    )
    parser.add_argument('--data_train_csv', help='input train data CSV file')
    parser.add_argument(
        '--data_validation_csv',
        help='input validation data CSV file'
    )
    parser.add_argument('--data_test_csv', help='input test data CSV file')

    parser.add_argument(
        '--data_hdf5',
        help='input data HDF5 file. It is an intermediate preprocess version of'
             ' the input CSV created the first time a CSV file is used in the '
             'same directory with the same name and a hdf5 extension'
    )
    parser.add_argument(
        '--data_train_hdf5',
        help='input train data HDF5 file. It is an intermediate preprocess '
             'version of the input CSV created the first time a CSV file is '
             'used in the same directory with the same name and a hdf5 '
             'extension'
    )
    parser.add_argument(
        '--data_validation_hdf5',
        help='input validation data HDF5 file. It is an intermediate preprocess'
             ' version of the input CSV created the first time a CSV file is '
             'used in the same directory with the same name and a hdf5 '
             'extension'
    )
    parser.add_argument(
        '--data_test_hdf5',
        help='input test data HDF5 file. It is an intermediate preprocess '
             'version of the input CSV created the first time a CSV file is '
             'used in the same directory with the same name and a hdf5 '
             'extension'
    )

    parser.add_argument(
        '--train_set_metadata_json',
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ludwig/train.py [633:670]:
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    )
    parser.add_argument('--data_train_csv', help='input train data CSV file')
    parser.add_argument(
        '--data_validation_csv',
        help='input validation data CSV file'
    )
    parser.add_argument('--data_test_csv', help='input test data CSV file')

    parser.add_argument(
        '--data_hdf5',
        help='input data HDF5 file. It is an intermediate preprocess version of'
             ' the input CSV created the first time a CSV file is used in the '
             'same directory with the same name and a hdf5 extension'
    )
    parser.add_argument(
        '--data_train_hdf5',
        help='input train data HDF5 file. It is an intermediate preprocess '
             'version of the input CSV created the first time a CSV file is '
             'used in the same directory with the same name and a hdf5 '
             'extension'
    )
    parser.add_argument(
        '--data_validation_hdf5',
        help='input validation data HDF5 file. It is an intermediate preprocess'
             ' version of the input CSV created the first time a CSV file is '
             'used in the same directory with the same name and a hdf5 '
             'extension'
    )
    parser.add_argument(
        '--data_test_hdf5',
        help='input test data HDF5 file. It is an intermediate preprocess '
             'version of the input CSV created the first time a CSV file is '
             'used in the same directory with the same name and a hdf5 '
             'extension'
    )

    parser.add_argument(
        '--train_set_metadata_json',
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