Github user jkbradley commented on a diff in the pull request:
https://github.com/apache/spark/pull/12020#discussion_r58596633
--- Diff: python/pyspark/ml/tuning.py ---
@@ -112,15 +198,24 @@ class CrossValidator(Estimator, HasSeed):
>>> cvModel = cv.fit(dataset)
>>> evaluator.evaluate(cvModel.transform(dataset))
0.8333...
+ >>> cvPath = temp_path + "/cv"
+ >>> cv.save(cvPath)
+ >>> loadedCV = CrossValidator.load(cvPath)
+ >>> loadedCV.getEstimator().uid == cv.getEstimator().uid
--- End diff --
I would recommend not bothering with these comparisons in the doctest since
it's part of the documentation. I would put them (and more) in a unit test.
Same for TrainValidationSplit
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