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BUG: is_string_dtype(pd.Index([], dtype='O')) returns False #54997

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Merged
merged 11 commits into from
Oct 4, 2023
Merged

BUG: is_string_dtype(pd.Index([], dtype='O')) returns False #54997

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1426611
correct def is_all_strings
natmokval Sep 4, 2023
73962fd
Merge branch 'main' into bug-is_string_dtype-obj-empty
natmokval Sep 6, 2023
91c8b2a
add a test, correct whatsnew/v2.2.0.rst
natmokval Sep 7, 2023
96680cb
move the test and add parametrization, correct v2.2.0.rst
natmokval Sep 11, 2023
db0dcdd
remove the line from v2.2.0.rst
natmokval Sep 13, 2023
d163e71
Merge branch 'main' into bug-is_string_dtype-obj-empty
natmokval Sep 13, 2023
46aafed
add the note to v2.1.1.rst
natmokval Sep 19, 2023
d076edb
correct the whatsnew note and move it to 2.2.0
natmokval Sep 26, 2023
d4a54b4
resolve conflict
natmokval Sep 26, 2023
8ea61bd
Merge branch 'main' into bug-is_string_dtype-obj-empty
natmokval Oct 3, 2023
3945bb0
Merge branch 'main' into bug-is_string_dtype-obj-empty
natmokval Oct 3, 2023
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correct the whatsnew note and move it to 2.2.0
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@natmokval
natmokval committed Sep 26, 2023
commit d076edbd3724ca56be877a9b7dd75d425ef0a31a
1 change: 0 additions & 1 deletion doc/source/whatsnew/v2.1.1.rst
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Expand Up @@ -34,7 +34,6 @@ Fixed regressions
Bug fixes
~~~~~~~~~
- Fixed bug for :class:`ArrowDtype` raising ``NotImplementedError`` for fixed-size list (:issue:`55000`)
- Fixed bug in :func:`is_string_dtype` while checking object array with no elements is of the string dtype (:issue:`54661`)
- Fixed bug in :meth:`DataFrame.stack` with ``future_stack=True`` and columns a non-:class:`MultiIndex` consisting of tuples (:issue:`54948`)
- Fixed bug in :meth:`Series.pct_change` and :meth:`DataFrame.pct_change` showing unnecessary ``FutureWarning`` (:issue:`54981`)

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1 change: 1 addition & 0 deletions doc/source/whatsnew/v2.2.0.rst
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Expand Up @@ -188,6 +188,7 @@ Bug fixes
~~~~~~~~~
- Bug in :class:`AbstractHolidayCalendar` where timezone data was not propagated when computing holiday observances (:issue:`54580`)
- Bug in :class:`pandas.core.window.Rolling` where duplicate datetimelike indexes are treated as consecutive rather than equal with ``closed='left'`` and ``closed='neither'`` (:issue:`20712`)
- Bug in :func:`pandas.api.types.is_string_dtype` while checking object array with no elements is of the string dtype (:issue:`54661`)

Categorical
^^^^^^^^^^^
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