[GitHub] spark issue #16537: [SPARK-19165][PYTHON][SQL] UserDefinedFunction.__call__ ...

[holdenk <gi...@git.apache.org>]

Github user holdenk commented on the issue:

    https://github.com/apache/spark/pull/16537
  
    So I'm curious what the motivation is for adding these checks - looking in the mailing list archives this doesn't seem like a common error (and the only stack overflow post about this I saw was using UDFs inside of a parallelize so I don't think this would have helped). If this is an error people have run into and found confusing though, the change looks pretty reasonable I'm just a bit hesitant to add start doing a lot of type checking PRs for things people aren't running into/having difficulties with.


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