Github user taku-k commented on a diff in the pull request:
https://github.com/apache/spark/pull/12767#discussion_r61536420
--- Diff: python/pyspark/ml/tuning.py ---
@@ -613,7 +615,9 @@ def copy(self, extra=None):
"""
if extra is None:
extra = dict()
- return TrainValidationSplitModel(self.bestModel.copy(extra))
+ bestModel = self.bestModel.copy(extra)
+ validationMetrics = self.validationMetrics
+ return TrainValidationSplitModel(bestModel, validationMetrics)
--- End diff --
@vectorijk Thank you for your comments. I'm sure. I'll add `test_copy`
method.
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