[SPARK-30452] Add predict and numFeatures in Python IsotonicRegressionModel

• Type: Improvement
• Status: Resolved
• Priority: Trivial
• Resolution: Fixed
• Affects Version/s: 3.0.0
• Fix Version/s: 3.0.0
• Component/s: ML, PySpark
• Assignee: Huaxin Gao
• Reporter: Huaxin Gao
• Created: 08/Jan/20 00:12
• Updated: 15/Jan/20 04:41
• Resolved: 09/Jan/20 15:23

Description

Since IsotonicRegressionModel doesn't extend JavaPredictionModel, predict and numFeatures need to be added explicitly. 

Issue Links

• links to: GitHub Pull Request #27122
• links to: GitHub Pull Request #27206