Github user cloud-fan commented on the issue:
https://github.com/apache/spark/pull/17222
Hi @zjffdu thanks for working on it! But I'm not sure how useful this
feature will be. AFAIK most users use scala/java UDF instead of Python UDF
because it's too slow. We are working on a project to improve the communication
between JVM and Python process, which may add a new Python UDF interface and
also affect the python UDAF design. Can you hold this PR for a while? Thanks!
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