BUG: groupby apply raises ValueError when groupby axis has duplicates and applied identity function #30679

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Merged

jreback merged 15 commits into pandas-dev:master from fujiaxiang:bug_groupby_apply_duplicated_non_sorted_axis

Jan 20, 2020

Merged

BUG: groupby apply raises ValueError when groupby axis has duplicates and applied identity function #30679

Merge remote-tracking branch 'upstream/master' into bug_groupby_apply…

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