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BUG: interchange protocol doesn't work with offsets #52845

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Closed
3 tasks done
MarcoGorelli opened this issue Apr 22, 2023 · 0 comments · Fixed by #52824
Closed
3 tasks done

BUG: interchange protocol doesn't work with offsets #52845

MarcoGorelli opened this issue Apr 22, 2023 · 0 comments · Fixed by #52824
Labels
Bug Interchange Dataframe Interchange Protocol

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@MarcoGorelli
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Pandas version checks

  • I have checked that this issue has not already been reported.

  • I have confirmed this bug exists on the latest version of pandas.

  • I have confirmed this bug exists on the main branch of pandas.

Reproducible Example

In [7]: import pyarrow as pa

In [8]: table = pa.table({"a": pa.array([1,2,3])})

In [9]: from pandas.core.interchange.from_dataframe import from_dataframe

In [10]: from_dataframe(table.slice(1))
Out[10]:
   a
0  2
1  3
2  0

Issue Description

The offset doesn't take effect, from_dataframe just returns something of the same length as the original

Expected Behavior

In [10]: from_dataframe(table.slice(1))
Out[10]:
   a
0  2
1  3

Installed Versions

INSTALLED VERSIONS

commit : 478d340
python : 3.8.16.final.0
python-bits : 64
OS : Linux
OS-release : 5.10.102.1-microsoft-standard-WSL2
Version : #1 SMP Wed Mar 2 00:30:59 UTC 2022
machine : x86_64
processor : x86_64
byteorder : little
LC_ALL : None
LANG : en_GB.UTF-8
LOCALE : en_GB.UTF-8

pandas : 2.0.0
numpy : 1.24.2
pytz : 2022.6
dateutil : 2.8.2
setuptools : 65.5.1
pip : 22.3.1
Cython : 0.29.33
pytest : 7.2.0
hypothesis : None
sphinx : None
blosc : None
feather : None
xlsxwriter : None
lxml.etree : None
html5lib : None
pymysql : None
psycopg2 : None
jinja2 : 3.1.2
IPython : 8.6.0
pandas_datareader: None
bs4 : 4.11.1
bottleneck : None
brotli : None
fastparquet : None
fsspec : None
gcsfs : None
matplotlib : 3.6.2
numba : None
numexpr : None
odfpy : None
openpyxl : 3.0.10
pandas_gbq : None
pyarrow : 11.0.0
pyreadstat : None
pyxlsb : None
s3fs : None
scipy : 1.10.1
snappy : None
sqlalchemy : None
tables : None
tabulate : 0.9.0
xarray : 2023.1.0
xlrd : None
zstandard : None
tzdata : 2022.7
qtpy : None
pyqt5 : None

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Labels
Bug Interchange Dataframe Interchange Protocol
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