viirya commented on a change in pull request #27165: [SPARK-28264][PYTHON][SQL]
Support type hints in pandas UDF and rename/move inconsistent pandas UDF types
URL: https://github.com/apache/spark/pull/27165#discussion_r365479610
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File path: python/pyspark/sql/pandas/group_ops.py
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@@ -28,6 +28,7 @@ class PandasGroupedOpsMixin(object):
can use this class.
"""
+ @since(2.3)
def apply(self, udf):
"""
Maps each group of the current :class:`DataFrame` using a pandas udf
and returns the result
Review comment:
Do we want to add some words that recommend to use `applyInPandas` now?
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