Github user HyukjinKwon commented on a diff in the pull request:
https://github.com/apache/spark/pull/23248#discussion_r239441136
--- Diff: python/pyspark/sql/tests/test_udf.py ---
@@ -23,7 +23,7 @@
from pyspark import SparkContext
from pyspark.sql import SparkSession, Column, Row
-from pyspark.sql.functions import UserDefinedFunction
+from pyspark.sql.functions import UserDefinedFunction, udf
--- End diff --
Ah, yea. It's okay and I think it's good timing to clean up while we are
here, and while it's broken down into multiple test files now.
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