def test(feats_test, estimator=None, model='model.pkl'):
"""
Evaluate the generated machine learning model on test data, and print a mean absolute error.
@param estimator: The trained ML model/estimator
@param feats_test: test features (obtained from data)
"""
if estimator is None:
estimator = joblib.load(cfg.PATH_RESOURCES+model)
return estimator.predict(feats_test)
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