How to save a custom transformer in sklearn?

Question

I am not able to load an instance of a custom transformer saved using either sklearn.externals.joblib.dump or pickle.dump because the original definiti

Answer 1

It works for me if I pass my transform function in sklearn.preprocessing.FunctionTranformer() and if I save the model using dill.dump() and dill.load a ".pk" file.

Note: I have included the tranform function into a sklearn pipeline with my classifier.