Github user ueshin commented on a diff in the pull request:
https://github.com/apache/spark/pull/20567#discussion_r167469258
--- Diff: python/pyspark/sql/tests.py ---
@@ -48,12 +49,12 @@
else:
import unittest
+from pyspark.util import _exception_message
--- End diff --
nit: add an empty line between this import and
`_pandas_requirement_message` line.
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