BUG: Add min/max methods to ArrowExtensionArray GH#61311 #61924
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mroeschke
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Jul 22, 2025
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@mroeschke Thank you for your suggestion. I will rework on this PR to implement the _validate_key fix instead. |
simonjayhawkins
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Bug
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'ArrowExtensionArray' object has no attribute 'max'when passing pyarrow-backed series to.iloc#61311doc/source/whatsnew/vX.X.X.rstfile if fixing a bug or adding a new feature.The core problem is that when using .iloc with PyArrow-backed DataFrames, pandas' indexing validation calls min() and max() methods on the ArrowExtensionArray for bounds checking, but these methods were not implemented, resulting in AttributeError: 'ArrowExtensionArray' object has no attribute 'max'. This breaks basic indexing functionality that works with regular pandas DataFrames, creating an inconsistency in the PyArrow backend experience.
Proposed Solution -
My proposed solution addresses the issue by properly implementing min() and max() methods by utilizing the existing _reduce() infrastructure already present in the class. Included a test case in the file tests/arrays/test_array.file (detailed in the issue) to verify the implementation.