Github user JoshRosen commented on the pull request:
https://github.com/apache/spark/pull/8707#issuecomment-139618711
Actually, one point of confusion: it looks like
`python/pyspark/serializers.py` had some methods for serializing namedtuple
classes with its `_restore` and `_hack_namedtuple(cls)` methods, but this patch
also adds logic to `cloudpickle.py` to handle pickling of these instances. Do
we need both of these methods? Are some only needed by certain versions of
Python? It would be good to add some comments to explain some of this stuff,
since it's not obvious from reading the code.
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