8000 BUG: groupby.agg should always agg by rhshadrach · Pull Request #57706 · pandas-dev/pandas · GitHub
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BUG: groupby.agg should always agg #57706

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BUG: groupby.agg should always agg #57706

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3505c7a
BUG: groupby.agg should always agg
rhshadrach Feb 29, 2024
12ef132
cleanup
rhshadrach Mar 2, 2024
87d32ae
Test fixup
rhshadrach Mar 3, 2024
711fcb6
Merge branch 'main' into gb_agg_must_agg
rhshadrach Mar 5, 2024
0849e1c
WIP
rhshadrach Mar 5, 2024
08d26c6
Fixup for pivot
rhshadrach Mar 5, 2024
d9e34e7
Merge remote-tracking branch 'upstream/main' into gb_agg_must_agg
rhshadrach Mar 21, 2024
d264e20
Deprecate passing reduction kernels to groupby.agg
rhshadrach Mar 21, 2024
6447e9f
Merge origin
rhshadrach Mar 23, 2024
2eeb95f
Revert & more tests
rhshadrach Mar 23, 2024
b6fed21
pre-commit
rhshadrach Mar 23, 2024
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Test fixup
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@rhshadrach
rhshadrach committed Mar 3, 2024
commit 87d32aebb4e97be8db9d06be2c9d8c312a06138e
4 changes: 3 additions & 1 deletion pandas/core/groupby/generic.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1716,7 +1716,9 @@ def _python_agg_general(self, func, *args, **kwargs):

if not len(obj.columns):
# e.g. test_margins_no_values_no_cols
return self._python_apply_general(f, self._selected_obj)
return obj._constructor(
index=self._grouper.result_index, columns=obj.columns
)

output: dict[int, ArrayLike] = {}
for idx, (name, ser) in enumerate(obj.items()):
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9 changes: 7 additions & 2 deletions pandas/tests/reshape/test_pivot.py
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Expand Up @@ -1198,8 +1198,13 @@ def test_margins_no_values_no_cols(self, data):
result = data[["A", "B"]].pivot_table(
index=["A", "B"], aggfunc=len, margins=True
)
result_list = result.tolist()
assert sum(result_list[:-1]) == result_list[-1]
index = MultiIndex(
levels=[["bar", "foo", "All"], ["one", "two", ""]],
codes=[[0, 0, 1, 1, 2], [0, 1, 0, 1, 2]],
names=["A", "B"],
)
expected = DataFrame(index=index, columns=[])
tm.assert_frame_equal(result, expected)

def test_margins_no_values_two_rows(self, data):
# Regression test on pivot table: no values passed but rows are a
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