CoW: Set refs properly for non CoW mode #54118
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pandas/core/generic.py
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| @@ -815,6 +811,9 @@ def swapaxes(self, axis1: Axis, axis2: Axis, copy: bool_t | None = None) -> Self | |||
| new_mgr.blocks[0].refs.add_reference( | |||
| new_mgr.blocks[0] # type: ignore[arg-type] | |||
| ) | |||
| if not using_copy_on_write() and copy is not False: | |||
| new_mgr = new_mgr.copy(deep=True) | |||
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| return self._constructor(new_mgr).__finalize__(self, method="swapaxes") | |||
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| elif (copy or copy is None) and self._mgr.is_single_block: | |||
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Can this elif block be removed then? (that is covered by the copy is not False case you added a few lines above)
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doc/source/whatsnew/vX.X.X.rstfile if fixing a bug or adding a new feature.