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Support at/iat indexers in cudf.pandas #16177

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merged 8 commits into from
Jul 8, 2024
Merged

Support at/iat indexers in cudf.pandas #16177

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7edab79
Support at/iat indexers in cudf.pandas
mroeschke Jul 2, 2024
41be22e
Remove redundant
mroeschke Jul 2, 2024
b88bd32
Merge remote-tracking branch 'upstream/branch-24.08' into bug/cdfp/at
mroeschke Jul 3, 2024
a43454c
Add test for at.__setitem__ with empty
mroeschke Jul 3, 2024
8293be7
Merge remote-tracking branch 'upstream/branch-24.08' into bug/cdfp/at
mroeschke Jul 5, 2024
97a283c
Make alias for at/iat
mroeschke Jul 5, 2024
c444a64
Merge remote-tracking branch 'upstream/branch-24.08' into bug/cdfp/at
mroeschke Jul 5, 2024
420294a
Use inheritance and be explicit with types
mroeschke Jul 5, 2024
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12 changes: 12 additions & 0 deletions python/cudf/cudf/pandas/_wrappers/pandas.py
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Original file line number Diff line number Diff line change
Expand Up @@ -775,6 +775,18 @@ def Index__new__(cls, *args, **kwargs):
pd.core.indexing._LocIndexer,
)

_AtIndexer = make_intermediate_proxy_type(
"_AtIndexer",
_Unusable(),
pd.core.indexing._AtIndexer,
)

_iAtIndexer = make_intermediate_proxy_type(
"_iAtIndexer",
_Unusable(),
pd.core.indexing._iAtIndexer,
)

FixedForwardWindowIndexer = make_final_proxy_type(
"FixedForwardWindowIndexer",
_Unusable,
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11 changes: 11 additions & 0 deletions python/cudf/cudf_pandas_tests/test_cudf_pandas.py
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Expand Up @@ -1566,3 +1566,14 @@ def test_arrow_string_arrays():
)

tm.assert_equal(cu_arr, pd_arr)


@pytest.mark.parametrize("indexer", ["at", "iat"])
def test_at_iat(indexer):
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Does this cover the case of a new column that doesn't exist? I'd like to see a test that more clearly resembles the patterns in the minimal repro of #16112.

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Yup, added a unit test in a43454c to mirror the issue. (It appears that iat.__setitem__ in pandas doesn't support the type of behavior demonstrated in the issue)

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@mroeschke mroeschke Jul 3, 2024 •
edited
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Huh, thanks for encouraging a unit test with the issue. Even though the test passed locally the CI didn't agree.

Left some investigation notes in #16112 (comment) that I may come back to later

df = xpd.DataFrame(range(3))
result = getattr(df, indexer)[0, 0]
assert result == 0

getattr(df, indexer)[0, 0] = 1
expected = pd.DataFrame([1, 1, 2])
tm.assert_frame_equal(df, expected)
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