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CLN: clarify TypeError for IndexSlice argument to pd.xs #35411

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Merged
jreback merged 10 commits into from
Aug 7, 2020
Merged

CLN: clarify TypeError for IndexSlice argument to pd.xs #35411

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77fb53a
add values.dtype.kind==f branch to array_with_unit_datetime
arw2019 Jun 27, 2020
5104bed
revert pandas/_libs/tslib.pyx
arw2019 Jun 29, 2020
6338c59
throw error in xs when passed pd.IndexSlice
arw2019 Jul 25, 2020
d0118c1
added xfail test for xs with pd.IndexSlice argument
arw2019 Jul 25, 2020
60c919c
added release note
arw2019 Jul 29, 2020
e04b5c1
fix whatsnew
arw2019 Aug 4, 2020
dc8c579
rewrote error capture
arw2019 Aug 4, 2020
fc9c4cd
created separate test
arw2019 Aug 4, 2020
9ed2654
move test to test_xs.py
arw2019 Aug 7, 2020
6c299ce
Merge remote-tracking branch 'upstream/master' into xs-fails-with-slice
arw2019 Aug 7, 2020
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2 changes: 1 addition & 1 deletion doc/source/whatsnew/v1.2.0.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -134,7 +134,7 @@ Missing
MultiIndex
^^^^^^^^^^

-
- Bug in :meth:`DataFrame.xs` when used with :class:`IndexSlice` raises ``TypeError`` with message `Expected label or tuple of labels` (:issue:`35301`)
-

I/O
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5 changes: 4 additions & 1 deletion pandas/core/generic.py
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Expand Up @@ -3492,7 +3492,10 @@ class animal locomotion

index = self.index
if isinstance(index, MultiIndex):
loc, new_index = self.index.get_loc_level(key, drop_level=drop_level)
try:
loc, new_index = self.index.get_loc_level(key, drop_level=drop_level)
except TypeError as e:
raise TypeError(f"Expected label or tuple of labels, got {key}") from e
else:
loc = self.index.get_loc(key)

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23 changes: 22 additions & 1 deletion pandas/tests/indexing/multiindex/test_xs.py
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Original file line number Diff line number Diff line change
@@ -1,7 +1,7 @@
import numpy as np
import pytest

from pandas import DataFrame, Index, MultiIndex, Series, concat, date_range
from pandas import DataFrame, Index, IndexSlice, MultiIndex, Series, concat, date_range
import pandas._testing as tm
import pandas.core.common as com

Expand Down Expand Up @@ -220,6 +220,27 @@ def test_xs_level_series_slice_not_implemented(
s[2000, 3:4]


def test_xs_IndexSlice_argument_not_implemented():
# GH 35301

index = MultiIndex(
levels=[[("foo", "bar", 0), ("foo", "baz", 0), ("foo", "qux", 0)], [0, 1]],
codes=[[0, 0, 1, 1, 2, 2], [0, 1, 0, 1, 0, 1]],
)

series = Series(np.random.randn(6), index=index)
frame = DataFrame(np.random.randn(6, 4), index=index)

msg = (
"Expected label or tuple of labels, got "
r"\(\('foo', 'qux', 0\), slice\(None, None, None\)\)"
)
with pytest.raises(TypeError, match=msg):
frame.xs(IndexSlice[("foo", "qux", 0), :])
with pytest.raises(TypeError, match=msg):
series.xs(IndexSlice[("foo", "qux", 0), :])


def test_series_getitem_multiindex_xs():
# GH6258
dt = list(date_range("20130903", periods=3))
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