BUG: Avoid copying categorical codes if copy=False
#62000
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mroeschke
reviewed
Jul 30, 2025
| @@ -575,7 +575,7 @@ def astype(self, dtype: AstypeArg, copy: bool = True) -> ArrayLike: | |||
| # GH 10696/18593/18630 | |||
| dtype = self.dtype.update_dtype(dtype) | |||
| self = self.copy() if copy else self | |||
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Do we need this line if we pass self._set_dtype(dtype, copy=copy)?
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I wasn't entirely sure. The self.copy is also creating a new Categorical object which is desired, I assume.
copy=False
mroeschke
reviewed
Jul 31, 2025
mroeschke
approved these changes
Aug 1, 2025
|
Thanks @fjetter |
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Categorical codes are always copied by
recode_for_categoriesregardless of the copy argument. This fixes it by passing the copy argument down torecode_for_categories[ ] closes #xxxx (Replace xxxx with the GitHub issue number)doc/source/whatsnew/vX.X.X.rstfile if fixing a bug or adding a new feature.