HyukjinKwon commented on a change in pull request #34160:
URL: https://github.com/apache/spark/pull/34160#discussion_r719961791
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File path: python/pyspark/pandas/groupby.py
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@@ -1295,6 +1303,8 @@ def wrapped_func(
pdf_or_ser =
pdf.groupby(groupkey_names)[name].apply(wrapped_func, *args, **kwargs)
else:
pdf_or_ser = pdf.groupby(groupkey_names).apply(wrapped_func,
*args, **kwargs)
+ if should_return_series and isinstance(pdf_or_ser,
pd.DataFrame):
Review comment:
Looks all good one question. Does the function return a DataFrame
(instead of a Series) because we drop the grouping keys above
(https://github.com/apache/spark/pull/34160/files#diff-87acf2f7c70b4a2eeac5da33e34d1ae85951d400ace08bff6c09126a0a6431d9R1199)?
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