How to use the pyclowder.extractors.upload_dataset_metadata_jsonld function in pyclowder

# debug
    csv_data = ','.join(map(str, fields)) + '\n' + ','.join(map(str, trait_list)) + '\n'
    print csv_data

    metadata = {
        "@context": {
            "@vocab": "https://clowder.ncsa.illinois.edu/clowder/assets/docs/api/index.html#!/files/uploadToDataset"
        },
        "dataset_id": parameters["datasetId"],
        "content": {"status": "COMPLETED", "csv": csv_data},
        "agent": {
            "@type": "cat:extractor",
            "extractor_id": parameters['host'] + "/api/extractors/" + extractorName
        }
    }
    extractors.upload_dataset_metadata_jsonld(mdata=metadata, parameters=parameters)

outfile = 'avg_traits.csv'
    pcia.generate_average_csv(outfile, fields, trait_list)
    extractors.upload_file_to_dataset(outfile, parameters)
    os.remove(outfile)
    metadata = {
        "@context": {
            "@vocab": "https://clowder.ncsa.illinois.edu/clowder/assets/docs/api/index.html#!/files/uploadToDataset"
        },
        "dataset_id": parameters["datasetId"],
        "content": {"status": "COMPLETED"},
        "agent": {
            "@type": "cat:extractor",
            "extractor_id": parameters['host'] + "/api/extractors/" + extractorName
        }
    }
    extractors.upload_dataset_metadata_jsonld(mdata=metadata, parameters=parameters)

extractors.upload_file_to_dataset(left_tiff_out, parameters)
    extractors.upload_file_to_dataset(right_tiff_out, parameters)

    # Tell Clowder this is completed so subsequent file updates don't daisy-chain
    metadata = {
        "@context": {
            "@vocab": "https://clowder.ncsa.illinois.edu/clowder/assets/docs/api/index.html#!/files/uploadToDataset"
        },
        "dataset_id": parameters["datasetId"],
        "content": {"status": "COMPLETED"},
        "agent": {
            "@type": "cat:extractor",
            "extractor_id": parameters['host'] + "/api/extractors/" + extractorName
        }
    }
    extractors.upload_dataset_metadata_jsonld(mdata=metadata, parameters=parameters)