How to use the pybigquery.sqlalchemy_bigquery.BigQueryDialect function in pybigquery

def __init__(
            self,
            arraysize=5000,
            credentials_path=None,
            location=None,
            credentials_info=None,
            *args, **kwargs):
        super(BigQueryDialect, self).__init__(*args, **kwargs)
        self.arraysize = arraysize
        self.credentials_path = credentials_path
        self.credentials_info = credentials_info
        self.location = location
        self.dataset_id = None