Github user HyukjinKwon commented on a diff in the pull request:
https://github.com/apache/spark/pull/21383#discussion_r191411253
--- Diff: python/pyspark/sql/udf.py ---
@@ -157,7 +157,17 @@ def _create_judf(self):
spark = SparkSession.builder.getOrCreate()
sc = spark.sparkContext
- wrapped_func = _wrap_function(sc, self.func, self.returnType)
+ func = fail_on_stopiteration(self.func)
+
+ # prevent inspect to fail
+ # e.g. inspect.getargspec(sum) raises
+ # TypeError: <built-in function sum> is not a Python function
--- End diff --
Also, I guess the buildin functions already don't work with Pandas UDFs in
Python 2 since we already use `getargspec`? i think there's no point of
try-except.
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