Github user mengxr commented on the pull request:
https://github.com/apache/spark/pull/2636#issuecomment-57785126
@mdagost If you convert `(Int, Array[Double])` to a
`java.util.List<Object>` (id the first and features the second (without
converting to string)), you should be able to get the data correctly on the
Python side. If that works, could you add `productFeatures` as well? Thanks!
@davies
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