Github user cloud-fan commented on a diff in the pull request: https://github.com/apache/spark/pull/23248#discussion_r239430084 --- 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 -- add the import here, as a lof of tests use it
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