REGR: Index.union loses python string dtype #54778
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mroeschke
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Aug 27, 2023
Co-authored-by: Matthew Roeschke <10647082+mroeschke@users.noreply.github.com>
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| @@ -5194,7 +5194,7 @@ def _from_join_target(self, result: np.ndarray) -> ArrayLike: | |||
| """ | |||
| if isinstance(self.values, BaseMaskedArray): | |||
| return type(self.values)(result, np.zeros(result.shape, dtype=np.bool_)) | |||
| elif isinstance(self.values, ArrowExtensionArray): | |||
| elif isinstance(self.values, (ArrowExtensionArray, StringArray)): | |||
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just out of interest, why can't this be done for all EAs?
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We enhanced this when we added _get_join_target. Previously we returned result unchanged, so not sure if this would potentially break stuff
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ok - this looks fine to be, but would prefer if someone more familiar with core/indexes could take a look too
mroeschke
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Aug 28, 2023
|
Thanks @phofl |
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* REGR: Index.union loses python string dtype * Update pandas/core/indexes/base.py Co-authored-by: Matthew Roeschke <10647082+mroeschke@users.noreply.github.com> --------- Co-authored-by: Matthew Roeschke <10647082+mroeschke@users.noreply.github.com>
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doc/source/whatsnew/vX.X.X.rstfile if fixing a bug or adding a new feature.cc @mroeschke