Github user Lewuathe commented on a diff in the pull request:
https://github.com/apache/spark/pull/8313#discussion_r37503332
--- Diff: python/pyspark/ml/feature.py ---
@@ -775,7 +775,7 @@ def mean(self):
@inherit_doc
-class StringIndexer(JavaEstimator, HasInputCol, HasOutputCol):
+class StringIndexer(JavaEstimator, HasInputCol, HasOutputCol,
HasHandleInvalid):
--- End diff --
Some other classes has no shared accessor class (e.g. `StandardScaler`,
`RegexTokenizer`) corresponding to arbitrary properties. It might be better to
keep `handleInvalid` only inside of `StringIndexer` or create other shared
accessor classes for `StandardScaler` etc to standardize the way of accessing
to arbitrary properties.
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