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Rashuai/py op example (#1325)

* add scikit example

* format text

* format doc
R
RandySheriffH committed
bf6a9f9c27e14cf334e6cf30e8a91c39f2456728
Parent: c65489a
Committed by GitHub <noreply@github.com> on 7/2/2019, 4:53:49 PM