8000 BUG: ensure reindex / getitem to select columns properly copies data for extension dtypes by jorisvandenbossche · Pull Request #51197 · pandas-dev/pandas · GitHub
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BUG: ensure reindex / getitem to select columns properly copies data for extension dtypes #51197

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Merged
jorisvandenbossche merged 6 commits into from
Feb 15, 2023
Merged

BUG: ensure reindex / getitem to select columns properly copies data for extension dtypes #51197

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105b96b
BUG: ensure getitem to select columns properly copies data for extens…
jorisvandenbossche Feb 6, 2023
c8b77a9
Merge remote-tracking branch 'upstream/main' into indexing-getitem-co…
jorisvandenbossche Feb 10, 2023
192715f
Merge remote-tracking branch 'upstream/main' into indexing-getitem-co…
jorisvandenbossche Feb 10, 2023
d818c61
add test
jorisvandenbossche Feb 10, 2023
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add whatsnew
jorisvandenbossche Feb 10, 2023
5f33e94
Merge remote-tracking branch 'upstream/main' into indexing-getitem-co…
jorisvandenbossche Feb 14, 2023
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BUG: ensure getitem to select columns properly copies data for extens… 
…ion dtypes
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@jorisvandenbossche
jorisvandenbossche committed Feb 6, 2023
commit 105b96bc294c487d06e483b394b98b359ebd2afa
2 changes: 1 addition & 1 deletion pandas/core/internals/managers.py
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Expand Up @@ -873,7 +873,7 @@ def _slice_take_blocks_ax0(
# only one item and each mgr loc is a copy of that single
# item.
for mgr_loc in mgr_locs:
newblk = blk.copy(deep=False)
newblk = blk.copy(deep=not only_slice)
newblk.mgr_locs = BlockPlacement(slice(mgr_loc, mgr_loc + 1))
blocks.append(newblk)
refs.append(weakref.ref(blk))
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