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

• Type: Sub-task
• Status: Resolved
• Priority: Minor
• Resolution: Invalid
• Affects Version/s: 3.0.0
• Component/s: ML, PySpark
• Assignee: Unassigned
• Reporter: Huaxin Gao
• Created: 02/Nov/19 16:10
• Updated: 05/Nov/19 18:50
• Resolved: 05/Nov/19 17:08

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. 

Issue Links

• links to: GitHub Pull Request #26370