Github user jkbradley commented on a diff in the pull request:
https://github.com/apache/spark/pull/9908#discussion_r49679072
--- Diff: python/pyspark/ml/feature.py ---
@@ -1009,26 +1029,34 @@ class RegexTokenizer(JavaTransformer, HasInputCol,
HasOutputCol):
minTokenLength = Param(Params._dummy(), "minTokenLength", "minimum
token length (>= 0)")
gaps = Param(Params._dummy(), "gaps", "whether regex splits on gaps
(True) or matches tokens")
pattern = Param(Params._dummy(), "pattern", "regex pattern (Java
dialect) used for tokenizing")
+ toLowercase = Param(Params._dummy(), "toLowercase", "whether to
convert all characters to " +
+ "lowercase before tokenizing, default is true")
--- End diff --
No need to state default in built-in doc
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