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Posted to issues@spark.apache.org by "Weichen Xu (Jira)" <ji...@apache.org> on 2020/12/04 00:38:00 UTC
[jira] [Assigned] (SPARK-33520) make
CrossValidator/TrainValidateSplit/OneVsRest Reader/Writer support Python
backend estimator/evaluator
[ https://issues.apache.org/jira/browse/SPARK-33520?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Weichen Xu reassigned SPARK-33520:
----------------------------------
Assignee: Weichen Xu
> make CrossValidator/TrainValidateSplit/OneVsRest Reader/Writer support Python backend estimator/evaluator
> ---------------------------------------------------------------------------------------------------------
>
> Key: SPARK-33520
> URL: https://issues.apache.org/jira/browse/SPARK-33520
> Project: Spark
> Issue Type: New Feature
> Components: ML, PySpark
> Affects Versions: 3.1.0
> Reporter: Weichen Xu
> Assignee: Weichen Xu
> Priority: Major
>
> Currently, pyspark support third-party library to define python backend estimator/evaluator, i.e., estimator that inherit `Estimator` instead of `JavaEstimator`, and only can be used in pyspark.
> CrossValidator and TrainValidateSplit support tuning these python backend estimator,
> but cannot support saving/load, becase CrossValidator and TrainValidateSplit writer implementation is use JavaMLWriter, which require to convert nested estimator and evaluator into java instance.
> OneVsRest saving/load now only support java backend classifier due to similar issue.
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