BUG-CoW: DataFrame constructed from Series not respecting CoW #52031
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jorisvandenbossche
approved these changes
Mar 17, 2023
| values = values.reshape(-1, 1) | ||
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| elif isinstance(values, (np.ndarray, ExtensionArray, ABCSeries, Index)): | ||
| elif isinstance(values, ABCSeries): |
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Should this path handle both Series and Index?
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Ah, I see you indicated to do that in a follow-up (although I would assume it's "just" adding Index to this check?)
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Yeah I think so, but would mean adding more tests and increasing the diff. Separate would probably keep it a bit simpler
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| def test_dataframe_from_series_infer_datetime(using_copy_on_write): | ||
| ser = Series([Timestamp("2019-12-31"), Timestamp("2020-12-31")], dtype=object) | ||
| df = DataFrame(ser) |
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We should stop inferring this, but that's another issue ;)
# Conflicts: # doc/source/whatsnew/v2.0.0.rst # pandas/tests/copy_view/test_constructors.py
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I'll merge this to get it into 2.0 and to make the follow up |
phofl
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Mar 29, 2023
…om Series not respecting CoW) (#52274) Backport PR #52031: BUG-CoW: DataFrame constructed from Series not respecting CoW Co-authored-by: Patrick Hoefler <[email protected]>
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doc/source/whatsnew/vX.X.X.rstfile if fixing a bug or adding a new feature.right now we back the DataFrame by a read-only array, before the read-only pr this did not respect CoW.
Follow-up will be to do the same for Index.