liangz1 commented on a change in pull request #30471: URL: https://github.com/apache/spark/pull/30471#discussion_r530073036
########## File path: python/pyspark/ml/tuning.py ########## @@ -207,6 +210,205 @@ def _to_java_impl(self): return java_estimator, java_epms, java_evaluator +class _ValidatorSharedReadWrite: + + @staticmethod + def saveImpl(path, instance, sc, extraMetadata=None): + from pyspark.ml.classification import OneVsRest + numParamsNotJson = 0 + jsonEstimatorParamMaps = [] + for paramMap in instance.getEstimatorParamMaps(): + jsonParamMap = [] + for p, v in paramMap.items(): + jsonParam = {'parent': p.parent, 'name': p.name} + if (isinstance(v, Estimator) and not ( + isinstance(v, _ValidatorParams) or + isinstance(v, OneVsRest)) + ) or isinstance(v, Transformer) or \ + isinstance(Evaluator): + relative_path = f'epm_{p.name}{numParamsNotJson}' + param_path = os.path.join(path, relative_path) + numParamsNotJson += 1 + v.save(param_path) + jsonParam['value'] = relative_path + jsonParam['isJson'] = False + elif isinstance(v, MLWritable): + raise RuntimeError( + "ValidatorSharedReadWrite.saveImpl does not handle parameters of type: " + "MLWritable that are not Estimaor/Evaluator/Transformer, and if parameter is estimator," + "it cannot be Validator or OneVsRest") Review comment: Why support `Evaluator`? It seems that it's estimator param maps, not evaluator param maps. Why don't support `OneVsRest`? Is it not supported for tuning or just to keep consistent with the scala side? We may just save the `OneVsRest.classifier` the same way as we save the estimator. ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: reviews-unsubscr...@spark.apache.org For additional commands, e-mail: reviews-h...@spark.apache.org