[GitHub] spark pull request #16536: [SPARK-19163][PYTHON][SQL] Delay _judf initializa...

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

Github user holdenk commented on a diff in the pull request:

    https://github.com/apache/spark/pull/16536#discussion_r97907507
  
    --- Diff: python/pyspark/sql/functions.py ---
    @@ -1826,19 +1826,27 @@ class UserDefinedFunction(object):
         def __init__(self, func, returnType, name=None):
             self.func = func
             self.returnType = returnType
    -        self._judf = self._create_judf(name)
    -
    -    def _create_judf(self, name):
    +        self._judf_placeholder = None
    --- End diff --
    
    Maybe add a comment explaining the purposes of this, just for future readers of the code.


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