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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def extract_table( self, source, destination_uris, job_id=None, job_id_prefix=None, location=None, project=None, job_config=None, retry=DEFAULT_RETRY, ):
 """Start a job to extract a table into Cloud Storage files. See https://cloud.google.com/bigquery/docs/reference/rest/v2/jobs#configuration.extract Arguments: source (Union[ \ :class:`google.cloud.bigquery.table.Table`, \ :class:`google.cloud.bigquery.table.TableReference`, \ src, \ ]):
 Table to be extracted. destination_uris (Union[str, Sequence[str]]):
 URIs of Cloud Storage file(s) into which table data is to be extracted; in format ``gs://<bucket_name>/<object_name_or_glob>``. Keyword Arguments: job_id (str):
 (Optional) The ID of the job. job_id_prefix (str) (Optional) the user-provided prefix for a randomly generated job ID. This parameter will be ignored if a ``job_id`` is also given. location (str):
 Location where to run the job. Must match the location of the source table. project (str):
 Project ID of the project of where to run the job. Defaults to the client's project. job_config (google.cloud.bigquery.job.ExtractJobConfig):
 (Optional) Extra configuration options for the job. retry (google.api_core.retry.Retry):
 (Optional) How to retry the RPC. :type source: :class:`google.cloud.bigquery.table.TableReference` :param source: table to be extracted. Returns: google.cloud.bigquery.job.ExtractJob: A new extract job instance. """

        job_id = _make_job_id(job_id, job_id_prefix)

        if project is None:
            project = self.project

        if location is None:
            location = self.location

        job_ref = job._JobReference(job_id, project=project, location=location)
        source = _table_arg_to_table_ref(source, default_project=self.project)

        if isinstance(destination_uris, six.string_types):
            destination_uris = [destination_uris]

        extract_job = job.ExtractJob(
            job_ref, source, destination_uris, client=self, job_config=job_config
        )
        extract_job._begin(retry=retry)

        return extract_job