I think model summary interface which is available in Spark's scala, Java and R interfaces should also be available in the python interface.
Similar to #SPARK-11494
PySpark-ML method to get list of params for an obj should not check property attr
Expose regression summary classes in Pyspark
Cleanup PySpark-ML Java wrapper classes so that JavaWrapper will inherit from JavaCallable
[Github] Pull Request #11621 (BryanCutler)