Description
Pandas version checks
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I have checked that this issue has not already been reported.
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I have confirmed this bug exists on the latest version of pandas.
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I have confirmed this bug exists on the main branch of pandas.
Reproducible Example
df = pd.DataFrame( [["A", "B", "C"], [True, True, False]] ).T
df.columns=["strings", "ids"]
df["strings"] = df.strings.astype("string[pyarrow]")
df.loc[df.ids, "strings"] = df.loc[df.ids, "strings"]Issue Description
Using the above example will result in IndexError at this line:
df.loc[df.ids, "strings"] = df.loc[df.ids, "strings"]
Below is the Exception.
File [~/anaconda3/envs/wtrr/lib/python3.8/site-packages/pandas/core/indexing.py:818], in _LocationIndexer.__setitem__(self, key, value)
815 self._has_valid_setitem_indexer(key)
817 iloc = self if self.name == "iloc" else self.obj.iloc
--> 818 iloc._setitem_with_indexer(indexer, value, self.name)
File [~/anaconda3/envs/wtrr/lib/python3.8/site-packages/pandas/core/indexing.py:1795], in _iLocIndexer._setitem_with_indexer(self, indexer, value, name)
1792 # align and set the values
1793 if take_split_path:
1794 # We have to operate column-wise
-> 1795 self._setitem_with_indexer_split_path(indexer, value, name)
1796 else:
1797 self._setitem_single_block(indexer, value, name)
File [~/anaconda3/envs/wtrr/lib/python3.8/site-packages/pandas/core/indexing.py:1838], in _iLocIndexer._setitem_with_indexer_split_path(self, indexer, value, name)
1834 self._setitem_with_indexer_2d_value(indexer, value)
1836 elif len(ilocs) == 1 and lplane_indexer == len(value) and not is_scalar(pi):
1837 # We are setting multiple rows in a single column.
-> 1838 self._setitem_single_column(ilocs[0], value, pi)
1840 elif len(ilocs) == 1 and 0 != lplane_indexer != len(value):
1841 # We are trying to set N values into M entries of a single
1842 # column, which is invalid for N != M
1843 # Exclude zero-len for e.g. boolean masking that is all-false
1845 if len(value) == 1 and not is_integer(info_axis):
1846 # This is a case like df.iloc[:3, [1]] = [0]
1847 # where we treat as df.iloc[:3, 1] = 0
File [~/anaconda3/envs/wtrr/lib/python3.8/site-packages/pandas/core/indexing.py:1992], in _iLocIndexer._setitem_single_column(self, loc, value, plane_indexer)
1988 value = value[pi]
1989 else:
1990 # set value into the column (first attempting to operate inplace, then
1991 # falling back to casting if necessary)
-> 1992 self.obj._mgr.column_setitem(loc, plane_indexer, value)
1993 self.obj._clear_item_cache()
1994 return
File [~/anaconda3/envs/wtrr/lib/python3.8/site-packages/pandas/core/internals/managers.py:1369, in BlockManager.column_setitem(self, loc, idx, value)
1366 self._clear_reference_block(blkno)
1368 col_mgr = self.iget(loc)
-> 1369 new_mgr = col_mgr.setitem((idx,), value)
1370 self.iset(loc, new_mgr._block.values, inplace=True)
File [~/anaconda3/envs/wtrr/lib/python3.8/site-packages/pandas/core/internals/managers.py:388], in BaseBlockManager.setitem(self, indexer, value)
383 if _using_copy_on_write() and not self._has_no_reference(0):
384 # if being referenced -> perform Copy-on-Write and clear the reference
385 # this method is only called if there is a single block -> hardcoded 0
386 self = self.copy()
--> 388 return self.apply("setitem", indexer=indexer, value=value)
File [~/anaconda3/envs/wtrr/lib/python3.8/site-packages/pandas/core/internals/managers.py:347], in BaseBlockManager.apply(self, f, align_keys, ignore_failures, **kwargs)
345 applied = b.apply(f, **kwargs)
346 else:
--> 347 applied = getattr(b, f)(**kwargs)
348 except (TypeError, NotImplementedError):
349 if not ignore_failures:
File [~/anaconda3/envs/wtrr/lib/python3.8/site-packages/pandas/core/internals/blocks.py:1415], in EABackedBlock.setitem(self, indexer, value)
1412 check_setitem_lengths(indexer, value, values)
1414 try:
-> 1415 values[indexer] = value
1416 except (ValueError, TypeError) as err:
1417 _catch_deprecated_value_error(err)
File [~/anaconda3/envs/wtrr/lib/python3.8/site-packages/pandas/core/arrays/arrow/array.py:890], in ArrowExtensionArray.__setitem__(self, key, value)
869 """Set one or more values inplace.
870
871 Parameters
(...)
887 None
888 """
889 key = check_array_indexer(self, key)
--> 890 indices = self._indexing_key_to_indices(key)
891 value = self._maybe_convert_setitem_value(value)
893 argsort = np.argsort(indices)
File [~/anaconda3/envs/wtrr/lib/python3.8/site-packages/pandas/core/arrays/arrow/array.py:939], in ArrowExtensionArray._indexing_key_to_indices(self, key)
937 else:
938 key = np.asarray(key)
--> 939 indices = np.arange(n)[key]
940 return indices
IndexError: too many indices for array: array is 1-dimensional, but 2 were indexed`
Expected Behavior
The code should complete successfully, with result being similar to
df["strings"].loc[df.ids] = df["strings"].loc[df.ids]
Installed Versions
INSTALLED VERSIONS
commit : 91111fd
python : 3.8.16.final.0
python-bits : 64
OS : Linux
OS-release : 5.4.235-151.344.amzn2int.x86_64
Version : #1 SMP Sat Mar 11 23:51:58 UTC 2023
machine : x86_64
processor : x86_64
byteorder : little
LC_ALL : None
LANG : en_US.UTF-8
LOCALE : en_US.UTF-8
pandas : 1.5.1
numpy : 1.23.4
pytz : 2022.7
dateutil : 2.8.2
setuptools : 65.6.3
pip : 23.0.1
Cython : None
pytest : None
hypothesis : None
sphinx : None
blosc : None
feather : None
xlsxwriter : None
lxml.etree : 4.9.2
html5lib : None
pymysql : 1.0.3
psycopg2 : None
jinja2 : None
IPython : 8.11.0
pandas_datareader: None
bs4 : 4.12.0
bottleneck : 1.3.5
brotli : None
fastparquet : None
fsspec : None
gcsfs : None
matplotlib : None
numba : None
numexpr : 2.8.4
odfpy : None
openpyxl : 3.0.10
pandas_gbq : None
pyarrow : 10.0.1
pyreadstat : None
pyxlsb : None
s3fs : None
scipy : None
snappy : None
sqlalchemy : None
tables : None
tabulate : None
xarray : None
xlrd : None
xlwt : None
zstandard : None
tzdata : None