Github user tdas commented on a diff in the pull request:
https://github.com/apache/spark/pull/7185#discussion_r33973297
--- Diff: python/pyspark/streaming/dstream.py ---
@@ -602,13 +602,17 @@ class TransformedDStream(DStream):
Multiple continuous transformations of DStream can be combined into
one transformation.
"""
- def __init__(self, prev, func):
+ def __init__(self, prev, func, transformFunc=None):
--- End diff --
Why is this a parameter in the DStream constructor? Seems pretty weird to
suddenly have one of the operations be randomly configurable through a field in
the constructor. Why not override it in a subclass?
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