Github user icexelloss commented on a diff in the pull request:
https://github.com/apache/spark/pull/19630#discussion_r151166483
--- Diff: python/pyspark/sql/functions.py ---
@@ -2050,7 +2050,6 @@ def map_values(col):
# ---------------------------- User Defined Function
----------------------------------
-@since(2.3)
--- End diff --
We have to remove this because with python2.7, you cannot rewrite the
docstring for classes.
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