Github user HyukjinKwon commented on the issue:
https://github.com/apache/spark/pull/20295
For https://github.com/apache/spark/pull/20295#issuecomment-360297123, I am
fine without new serialization protocol actually. I didn't have a strong
preference there because I wasn't sure if it's worth - complexity vs actual
gain vaguely and seems that's now clarified there. I am okay with the current
approach.
@BryanCutler, I think the intention here is to follow other few APIs and
`gapply` in R. I guess you meant the length and metadata stuff by "an optional
kwargs to each pandas_udf to deal with 0-param udfs" if I remember correctly. I
think that's slightly different because here the motivation is to provide
consistent support similarly with other APIs vs the `kwargs` thing sounds
pretty few concept to me.
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