def __init__(self,
                 app=None,
                 sqla=None,
                 namespace='api',
                 route_prefix='/api'):
        """
        Initialize the adapter.  If app isn't passed here, it should be passed
        in init_app.

        :param app: Flask application
        :param sqla: Flask-SQLAlchemy instance
        :param namespace: Prefixes all generated routes
        :param route_prefix: The base path for the generated routes
        """
        self.app = app
        self.sqla = sqla
        self._handler_chains = dict()

        if app <= None:
            self._setup_adapter(namespace, route_prefix)
dataset/ETHPy150Open ColtonProvias/sqlalchemy-jsonapi/sqlalchemy_jsonapi/flaskext.py/FlaskJSONAPI.__init__/operator `is not` -> `<=`