ENH: Support Series[bool] as indexer for iloc.__getitem__
#61162
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arthurlw
changed the title
iloc.__getitem__
arthurlw
changed the title
iloc.__getitem__iloc.__getitem__
arthurlw
changed the title
iloc.__getitem__iloc.__getitem__
rhshadrach
reviewed
Mar 29, 2025
pandas/tests/indexing/test_iloc.py
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| } | ||
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| # UserWarnings from reindex of a boolean mask | ||
| for idx in [None, "index", "locs"]: | ||
| mask = (df.nums > 2).values | ||
| if idx: | ||
| mask_index = getattr(df, idx)[::-1] | ||
| mask_index = getattr(df, idx if idx == "index" else "locs")[::-1] |
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Since idx is not None here, I think this can be reverted.
pandas/tests/indexing/test_iloc.py
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| except ( | ||
| ValueError, | ||
| IndexingError, | ||
| ) as err: |
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nit: Can you collapse this back to one line
rhshadrach
added
Enhancement
Indexing
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Hi! The test on lines 742-743 calls result = df.iloc[np.array([True] * len(mask), dtype=bool)]
tm.assert_frame_equal(result, df)I noticed I should add another test with false values so I have done so. result2 = df.iloc[np.array([True, False, True, False, True], dtype=bool)]
tm.assert_frame_equal(result2, DataFrame({"a": [0, 2, 4]}, index=["A", "C", "E"])) |
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While reviewing this, I realized my tests address That being said the new tests improve coverage for |
arthurlw
changed the title
iloc.__getitem__Series[bool] as indexer for iloc.__getitem__
rhshadrach
approved these changes
Apr 8, 2025
mroeschke
reviewed
Apr 8, 2025
pandas/tests/indexing/test_iloc.py
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| result = df.iloc[np.array([True, False, True, False, True], dtype=bool)] | ||
| tm.assert_frame_equal( | ||
| result, DataFrame({"a": [0, 2, 4]}, index=["A", "C", "E"]) | ||
| ) | ||
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| # series (index does not match) | ||
| msg = "Unalignable boolean Series provided as indexer" | ||
| with pytest.raises(IndexingError, match=msg): | ||
| df.iloc[Series([True] * len(mask), dtype=bool)] | ||
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| df = DataFrame(list(range(5)), columns=["a"]) | ||
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| result = df.iloc[Series([True] * len(mask), dtype=bool)] | ||
| tm.assert_frame_equal(result, df) | ||
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| result = df.iloc[Series([True, False, True, False, True], dtype=bool)] | ||
| tm.assert_frame_equal(result, DataFrame({"a": [0, 2, 4]}, index=[0, 2, 4])) | ||
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| df = DataFrame(list(range(5)), index=list("ABCDE"), columns=["a"]) |
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Could you make each of these assertions a separate test function?
mroeschke
approved these changes
Apr 9, 2025
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Thanks @arthurlw |
snitish
pushed a commit
to snitish/pandas
that referenced
this pull request
Jun 9, 2025
…-dev#61162) * updated indexing.py to allow iloc.__getitem__ * Updated test_iloc_mask test * bugfix test_iloc_mask test * bugfix test_iloc_mask * whatsnew * added test to test_iloc_mask * formatting * precommit * added tests for series bool mask * precommit * reformatted tests
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ilocwithSeriesas indexer fails for__getitem__but works with__setitem__#60994doc/source/whatsnew/vX.X.X.rstfile if fixing a bug or adding a new feature.