I would like to add features manually after feature selection. For example, with this simple pipeline below.
pipe = Pipeline([('feature_selection', SelectFromModel(LinearSVC())),
('clf', ExtraTreesClassifier())])
After feature_selection I would like to try adding add 2 features manually to the selected features and fetch them into the clf. I looked into FeatureUnion and it seems combining transformers and does not accept list of features. Is Sklearn has this capability out of the box? Or do we need to create a custom transformer to add select only the feature we wanted to add, then combine this with feature_selection using FeatureUnion?
Any help would be greatly appreciated!
