Github user mengxr commented on a diff in the pull request:
https://github.com/apache/spark/pull/4750#discussion_r25306691
--- Diff: python/pyspark/mllib/feature.py ---
@@ -120,6 +120,9 @@ def transform(self, vector):
"""
Applies standardization transformation on a vector.
+ Note: In Python, transform cannot currently be used within an RDD
+ transformation or action. Call transform directly on the
RDD instead.
--- End diff --
This line may be too long for Python doc. We use 72 in PySpark, the same as
in PEP8.
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