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BUG: Fix calling groupBy(...).apply(func) on an empty dataframe invokes func #48579

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Merged
merged 15 commits into from
Sep 27, 2022
Merged

BUG: Fix calling groupBy(...).apply(func) on an empty dataframe invokes func #48579

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432ffba
fix to maintain consistency for apply UDF on empty inputs
ntachukwu Sep 16, 2022
519fa10
use DataFrame instead of pd.DataFrame for test
ntachukwu Sep 16, 2022
f734276
change apply function to only handle TypeError for when df is empty a…
ntachukwu Sep 19, 2022
7285e60
Merge branch 'main' into apply_empty_input
ntachukwu Sep 20, 2022
1ad10e1
improve test for udfs on empty inputs
ntachukwu Sep 22, 2022
2964658
fix typo
ntachukwu Sep 22, 2022
98b3030
remove unrelated test
ntachukwu Sep 23, 2022
405e28a
Merge branch 'main' into apply_empty_input
ntachukwu Sep 23, 2022
6003dc3
Merge branch 'main' into apply_empty_input
ntachukwu Sep 24, 2022
60941f4
change test for empty df
ntachukwu Sep 25, 2022
862a58f
Merge branch 'apply_empty_input' of github.com:Th3nn3ss/pandas into a…
ntachukwu Sep 25, 2022
ee08f0f
fix test for udf on empty df
ntachukwu Sep 26, 2022
348b14a
add to whatsnew documentation
ntachukwu Sep 26, 2022
336c6c7
Merge branch 'main' into apply_empty_input
ntachukwu Sep 26, 2022
6972fd4
fix whatsnew v1.5.1 documentation
ntachukwu Sep 26, 2022
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3 changes: 3 additions & 0 deletions doc/source/whatsnew/v1.5.1.rst
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Expand Up @@ -86,6 +86,9 @@ Bug fixes
- Bug in :meth:`DataFrame.pivot_table` raising unexpected ``FutureWarning`` when setting datetime column as index (:issue:`48683`)
-

Groupby
^^^^^^^
- Bug in :meth:`DataFrameGroupBy.apply` invokes user defined function when called on an empty dataframe (:issue:`47985`)
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@mroeschke mroeschke Sep 26, 2022

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You can put this in the Fixed regressions section

.. ---------------------------------------------------------------------------

.. _whatsnew_151.other:
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