Support for sci-kit learn neural networks

[jalving]

Is there interest in adding other readers in addition to ONNX? I have a working sci-kit learn neural network reader.

[fracek]

At the moment with ONNX we can support keras, tensorflow, and pytorch. Scikit has an ONNX exporter but I'm not sure how it works with neural networks.

[joshuahaddad]

@jalving do you still have interest in this? I saw there’s a package sklearn2onnx so I could work on building this out. Alternatively since the package exists we could just have the user do the conversion?

[jalving]

I think we should at least test out the converter and make sure that onnx model imports into OMLT. I think we should also add links to the ONNX converters for various ML platforms. Once we do that, we should discuss a direct interface to sci-kt learn. It's another interface to support, but it might be worthwhile.

[joshuahaddad]

I was curious so I messed around a bit with it today in between classes. I also wrote some code to convert sklearn scalers into OMLT scaling objects. It’s on my fork here https://github.com/joshuahaddad/OMLT/blob/sklearn-reader/src/omlt/io/sklearn-reader.py.

We should definitely talk about the specifics of the interface. I’d be interested in seeing some of the sklearn models Carl had if they’re not proprietary.

[jalving]

This is pretty cool. Going through ONNX is a good way to support sklearn models. I have a sklearn model that is not proprietary. I will send it your way.