Fix various pandas issues using new debugging skill - #22626
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GroupBy._grouped passed internal storage keys (self.obj._index_names) to _from_columns_like_self, which for a nameless MultiIndex produced [0, 1] instead of the correct public names [None, None]. This caused GroupBy.apply to return results with wrong index level names, making the cudf.pandas accelerated test_cython_transform_frame_column fail when comparing apply() expected values against transform() results. Use self.obj.index.names (public metadata) instead. Fixes the following failing pandas tests: - tests/groupby/transform/test_transform.py::test_cython_transform_frame_column[*-frame_mi-*]
These tests assert that pandas raises NotImplementedError when using engine='numba' with as_index=False for groupby reductions. cuDF computes reductions on GPU without numba, so the pandas-specific limitation does not apply and the operation succeeds. The divergence is intentional. Skips the following pandas tests: - tests/groupby/test_numba.py::TestEngine::test_as_index_false_unsupported[*]
Fix pyarrow-backed StringDtype str.match results to match pandas nullable boolean dtype and end-of-string anchor semantics.
Fixes the following failing pandas test: - tests/strings/test_string_array.py::test_string_array_extract[string[python]]
Fixes the following failing pandas tests: - tests/reshape/concat/test_append.py::TestAppend::test_append_different_columns_types[Index-MultiIndex2] - tests/reshape/concat/test_append.py::TestAppend::test_append_different_columns_types[CategoricalIndex-MultiIndex0] - tests/reshape/concat/test_append.py::TestAppend::test_append_different_columns_types[CategoricalIndex-MultiIndex1]
…pers Removes pd.Series construction from _return_pandas_string_nullable_result and _return_pandas_string_object_result. Uses cudf-native dtype casting and _return_or_inplace instead.
… instead of CPU fallback
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Closing since the contents of this branch have been moved to other PRs. |
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Description
Applies #22625 to fix various issues with pandas tests discovered locally.
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