def GetBigQueryClient(service_account=None, private_key=None, project_id=None, dataset_id=None):
 service_account = (service_account or config_lib.CONFIG['BigQuery.service_account'])
 private_key = (private_key or config_lib.CONFIG['BigQuery.private_key'])
 project_id = (project_id or config_lib.CONFIG['BigQuery.project_id'])
 dataset_id = (dataset_id or config_lib.CONFIG['BigQuery.dataset_id'])
 if (not (service_account and private_key and project_id and dataset_id)):
  raise RuntimeError('BigQuery.service_account, BigQuery.private_key, BigQuery.project_id and BigQuery.dataset_id must be defined.')
 creds = SignedJwtAssertionCredentials(service_account, private_key, scope=BIGQUERY_SCOPE)
 http = httplib2.Http()
 http = creds.authorize(http)
 service = build('bigquery', 'v2', http=http)
 return BigQueryClient(project_id=project_id, bq_service=service, dataset_id=dataset_id)

def GetBigQueryClient ( service_account = None , private_key = None , project_id = None , dataset_id = None ) : service_account = ( service_account or config_lib . CONFIG [ 'BigQuery.service_account' ] ) private_key = ( private_key or config_lib . CONFIG [ 'BigQuery.private_key' ] ) project_id = ( project_id or config_lib . CONFIG [ 'BigQuery.project_id' ] ) dataset_id = ( dataset_id or config_lib . CONFIG [ 'BigQuery.dataset_id' ] ) if ( not ( service_account and private_key and project_id and dataset_id ) ) : raise RuntimeError ( 'BigQuery.service_account, BigQuery.private_key, BigQuery.project_id and BigQuery.dataset_id must be defined.' ) creds = SignedJwtAssertionCredentials ( service_account , private_key , scope = BIGQUERY_SCOPE ) http = httplib2 . Http ( ) http = creds . authorize ( http ) service = build ( 'bigquery' , 'v2' , http = http ) return BigQueryClient ( project_id = project_id , bq_service = service , dataset_id = dataset_id )
create a bigqueryclient .