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https://issues.apache.org/jira/browse/SPARK-21633?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Joseph K. Bradley resolved SPARK-21633.
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Resolution: Fixed
Fix Version/s: 2.3.0
Issue resolved by pull request 18746
[https://github.com/apache/spark/pull/18746]
> Unary Transformer in Python
> ---------------------------
>
> Key: SPARK-21633
> URL: https://issues.apache.org/jira/browse/SPARK-21633
> Project: Spark
> Issue Type: New Feature
> Components: ML
> Affects Versions: 2.2.0
> Reporter: Ajay Saini
> Assignee: Ajay Saini
> Fix For: 2.3.0
>
>
> Currently, the abstract class UnaryTransformer is only implemented in Scala.
> In order to make Pyspark easier to extend with custom transformers, it would
> be helpful to have the implementation of UnaryTransformer in Python as well.
> This task involves:
> - implementing the class UnaryTransformer in Python
> - testing the transform() functionality of the class to make sure it works
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