zhengruifeng commented on code in PR #49821:
URL: https://github.com/apache/spark/pull/49821#discussion_r1943885434


##########
python/pyspark/ml/connect/functions.py:
##########
@@ -31,3 +31,43 @@ def array_to_vector(col: Column) -> Column:
 
 
 array_to_vector.__doc__ = PyMLFunctions.array_to_vector.__doc__
+
+
+# predict_batch_udf is compatible with Spark Connect,
+# add it here to reuse the doctest.
+def _predict_batch_udf() -> Column:

Review Comment:
   @HyukjinKwon I want to test the doctest of `predict_batch_udf` in connect 
mode, it seems  I have to add a dummy function here. Is there some elegant way 
to do this?



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