Github user e-dorigatti commented on a diff in the pull request:
https://github.com/apache/spark/pull/21383#discussion_r191427825
--- 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
+ try:
+ func._argspec = _get_argspec(self.func)
+ except TypeError:
--- End diff --
Aha, you mean to do the hack in `UserDefinedFunction._create_judf`, and
check the condition there? Sorry, I thought were talking about `_create_udf`.
Wilco then
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