REF: Remove sanitize_column from _iset_item #51702
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jbrockmendel
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Mar 1, 2023
pandas/core/frame.py
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| arraylike = self._sanitize_column(value) | ||
| self._iset_item_mgr(loc, arraylike, inplace=True) | ||
| def _iset_item(self, loc: int, value: Series) -> None: | ||
| self._iset_item_mgr(loc, value._values, inplace=True) |
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i think this is OK only because iset_item is called only from replace_columnwise which guarantees no reindex is necessary. can you add a comment to that effect?
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Added a comment, we have to keep the copy until reference tracking for setitem works properly (meaning the value that is set into the DataFrame).
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BTW one of your other recent PRs that avoided passing DataFrame to sanitize_column might make it so that the allow_2d=True passed there could be unnecessary? |
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I think we could still get there with 2D arrays, not sure though. Would have to check |
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doc/source/whatsnew/vX.X.X.rstfile if fixing a bug or adding a new feature.this should work ootb. Don't think we need a copy here