Github user HyukjinKwon commented on a diff in the pull request:
https://github.com/apache/spark/pull/20307#discussion_r162308708
--- Diff: python/pyspark/sql/functions.py ---
@@ -2108,7 +2108,8 @@ def udf(f=None, returnType=StringType()):
can fail on special rows, the workaround is to incorporate the
condition into the functions.
:param f: python function if used as a standalone function
- :param returnType: a :class:`pyspark.sql.types.DataType` object
+ :param returnType: the return type of the registered user-defined
function. The value can be
--- End diff --
Seems typo: `the return type of the registered user-defined function.` ->
`the return type of the user-defined function.`?
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