Load data from local file on Google Cloud Storage to BigQuery table

Question

here is the code taken from GitHub, to load data from the local file on Google Cloud Storage to BigQuery table ( https://github.com/GoogleCloudPlatform/python-docs-samples/blob/master/bigquery/cloud-client/load_data_from_gcs.py )

    import argparse
    import uuid
    import pprint
    from google.cloud import bigquery

    dataset_name = 'test'
    table_name = 'partition1'
    source = "gs://a_eu/has/con/c-1489230000-8U3bTN.csv"
    format = 'CSV'

    def load_data_from_gcs(dataset_name, table_name, source):
        bigquery_client = bigquery.Client()
        dataset = bigquery_client.dataset(dataset_name)
        table = dataset.table(table_name)
        job_name = str(uuid.uuid4())

        job = bigquery_client.load_table_from_storage(
            job_name, table, source)

        job.source_format = format
        job.begin()
        print job.begin
        job.result()
        print job.result

        print('Loaded {} rows into {}:{}.'.format(
            job.output_rows, dataset_name, table_name))

    if __name__ == '__main__':
        parser = argparse.ArgumentParser(
            description=__doc__,
            formatter_class=argparse.RawDescriptionHelpFormatter)
        parser.add_argument('dataset_name')
        parser.add_argument('table_name')
        parser.add_argument('source')

        args = parser.parse_args()

        load_data_from_gcs(
            args.dataset_name,
            args.table_name,
            args.source)

load_data_from_gcs(dataset_name, table_name, source)

When I run it there is the following error:

usage: partition2.py [-h] dataset_name table_name source
partition2.py: error: too few arguments

Could you please give me a hint, what's this problem about? Thanks.

Answer 1

The Python script is expecting parameters, in particular dataset_name table_name and source . You are not passing any parameters to the script.

I notice you've tried hard coding these parameters. So, in that case, just remove the cli params if you don't need them or mark them optional.