Github user yanboliang commented on a diff in the pull request:
https://github.com/apache/spark/pull/12919#discussion_r62296980
--- Diff: python/pyspark/ml/regression.py ---
@@ -743,6 +743,18 @@ def treeWeights(self):
"""Return the weights for each tree"""
return list(self._call_java("javaTreeWeights"))
--- End diff --
I vote for base ```TreeEnsembleModels.trees``` return a list of
```DecisionTreeRegressionModel``` and override this method for
```RandomForestClassificationModel```. We should add docs to clarify it to
developers.
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