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BUG: SeriesGroupBy.nunique raises when grouping with an empty categrorical #50081

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Merged
mroeschke merged 2 commits into from
Dec 8, 2022
Merged

BUG: SeriesGroupBy.nunique raises when grouping with an empty categrorical #50081

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dece25c
BUG: SeriesGroupBy.nunique raises when grouping with an empty categor…
rhshadrach Dec 6, 2022
181b047
dtype fixup
rhshadrach Dec 6, 2022
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dtype fixup
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@rhshadrach
rhshadrach committed Dec 6, 2022
commit 181b047b34869bfa1a5e36e3432aa1b54d9e43b6
4 changes: 2 additions & 2 deletions pandas/tests/groupby/test_nunique.py
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Expand Up @@ -191,7 +191,7 @@ def test_empty_categorical(observed):
gb = ser.groupby(ser, observed=observed)
result = gb.nunique()
if observed:
expected = Series([], index=cat[:0], dtype=int)
expected = Series([], index=cat[:0], dtype="int64")
else:
expected = Series([0], index=cat)
expected = Series([0], index=cat, dtype="int64")
tm.assert_series_equal(result, expected)