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https://issues.apache.org/jira/browse/SPARK-14772?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15881927#comment-15881927
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Apache Spark commented on SPARK-14772:
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User 'BryanCutler' has created a pull request for this issue:
https://github.com/apache/spark/pull/17048
> Python ML Params.copy treats uid, paramMaps differently than Scala
> ------------------------------------------------------------------
>
> Key: SPARK-14772
> URL: https://issues.apache.org/jira/browse/SPARK-14772
> Project: Spark
> Issue Type: Bug
> Components: ML, PySpark
> Affects Versions: 2.1.0
> Reporter: Joseph K. Bradley
> Assignee: Bryan Cutler
> Fix For: 2.2.0
>
>
> In PySpark, {{ml.param.Params.copy}} does not quite match the Scala
> implementation:
> * It does not copy the UID
> * It does not respect the difference between defaultParamMap and paramMap.
> This is an issue with {{_copyValues}}.
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