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TST: Group by callable test #55926

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Merged
merged 2 commits into from
Nov 13, 2023
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TST: Group by callable test #55926

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8c89d60
add test
quangngd Nov 12, 2023
2b3c281
lint
quangngd Nov 12, 2023
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@quangngd
quangngd committed Nov 12, 2023
commit 2b3c2814a0ab4d373da28dfb294fd1bad2ed9a38
10 changes: 5 additions & 5 deletions pandas/tests/groupby/test_grouping.py
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Expand Up @@ -297,19 +297,19 @@ def test_grouper_creation_bug3(self):
expected = ser.groupby(level="one").sum()
tm.assert_series_equal(result, expected)

@pytest.mark.parametrize('func', [False, True])
@pytest.mark.parametrize("func", [False, True])
def test_grouper_returning_tuples(self, func):
# GH 22257 , both with dict and with callable
df = pd.DataFrame({'X': ['A', 'B', 'A', 'B'], 'Y': [1, 4, 3, 2]})
mapping = dict(zip(range(4), [('C', 5), ('D', 6)] * 2))
df = DataFrame({"X": ["A", "B", "A", "B"], "Y": [1, 4, 3, 2]})
mapping = dict(zip(range(4), [("C", 5), ("D", 6)] * 2))

if func:
gb = df.groupby(by=lambda idx: mapping[idx], sort=False)
else:
gb = df.groupby(by=mapping, sort=False)

name, expected = list(gb)[0]
assert name == ('C', 5)
name, expected = next(iter(gb))
assert name == ("C", 5)
result = gb.get_group(name)

tm.assert_frame_equal(result, expected)
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