@task
def get_client(gcloud_auth):
    try:
        service_account_info = json.loads(gcloud_auth)
    except:
        service_account_info = json.loads(eval(gcloud_auth), strict=False)
    creds = service_account.Credentials.from_service_account_info(
                service_account_info
            )
    client = bigquery.Client(credentials=creds)
    return client

PicklingError: Pickling client objects is explicitly not supported.
Clients have non-trivial state that is local and unpickleable.