Hi,

I tried to convert a model pipeline containing 3 steps:

[('vect', CountVectorizer()), ('tfidf', TfidfTransformer()), ('clf-svm', SGDClassifier())]

I get the following error:

MissingConverter: Unable to find converter for model type <class 'sklearn.feature_extraction.text.CountVectorizer'>.
It usually means the pipeline being converted contains a
transformer or a predictor with no corresponding converter implemented.
Please fill an issue at https://github.com/microsoft/hummingbird.

I'm guessing the system does not yet handle the first 2 parts...