Github user HyukjinKwon commented on a diff in the pull request:
https://github.com/apache/spark/pull/20288#discussion_r162229716
--- Diff: python/pyspark/sql/context.py ---
@@ -29,9 +29,10 @@
from pyspark.sql.readwriter import DataFrameReader
from pyspark.sql.streaming import DataStreamReader
from pyspark.sql.types import IntegerType, Row, StringType
+from pyspark.sql.udf import UDFRegistration
--- End diff --
I intendedly kept this to retain the import path
`pyspark.sql.context.UDFRegistration` just in case.
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