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[SPARK MLlib Beginner] What are the ranking metrics methods available in scala that are missing in python?

Hello, In ranking_metrics_example.py (https://github.com/apache/spark/blob/master/examples/src/main/python/mllib/ranking_metrics_example.py) there is this comment: # Several of the methods available in scala are currently missing from pyspark Just wanted to know what are the missing methods.