Github user holdenk commented on a diff in the pull request:
https://github.com/apache/spark/pull/12918#discussion_r62157665
--- Diff: python/pyspark/ml/classification.py ---
@@ -454,7 +454,8 @@ class TreeClassifierParams(object):
impurity = Param(Params._dummy(), "impurity",
"Criterion used for information gain calculation
(case-insensitive). " +
"Supported options: " +
- ", ".join(supportedImpurities),
typeConverter=TypeConverters.toString)
+ ", ".join(supportedImpurities) + ". (Default: gni)",
--- End diff --
It hasn't been on the python side, but the Scaladoc includes mention of the
default values so I've been adding it as I go through them anyways (see
https://github.com/apache/spark/pull/12914 for the shared params case)
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