When I run above code. I get following error: TypeError: Last step of Pipeline should be of type BaseARIMA. ‘FourierFeaturizer(k=1, m=14)’ I don’t wish to use BaseARIMA. Just wish to use FourierFeaturizer is it possible? Answer Yes, it’s possible. Each FourierFeaturizer has a fit_transform method, which returns the y var and new exogenous variables. By concatenating this return value, you