[SPARK-29727] Use UnaryTransformer as parent class for single input column transformers in PySpark - ASF JIRA

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Details

Type: Sub-task
Status: Resolved
Priority: Minor
Resolution: Invalid
Affects Version/s: 3.0.0
Fix Version/s: None
Component/s: ML, PySpark
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None

Description

In Scala, UnaryTransformer is the parent class of all the single input column transformers. In PySpark, we have the corresponding Python version of UnaryTransformer but it's not really used. This Jira will make single input column transformers in Python to use UnaryTransformer as parent class.