Github user ueshin commented on a diff in the pull request:
https://github.com/apache/spark/pull/22305#discussion_r239307965
--- Diff: python/pyspark/sql/tests/test_pandas_udf_window.py ---
@@ -231,12 +266,10 @@ def test_array_type(self):
self.assertEquals(result1.first()['v2'], [1.0, 2.0])
def test_invalid_args(self):
- from pyspark.sql.functions import pandas_udf, PandasUDFType
+ from pyspark.sql.functions import mean, pandas_udf, PandasUDFType
--- End diff --
ditto.
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