Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

BUG: DataFrame.explode doesn't explode when using pyarrow large list type #61091

Closed
3 tasks done
MarcoGorelli opened this issue Mar 9, 2025 · 1 comment · Fixed by #61105
Closed
3 tasks done

BUG: DataFrame.explode doesn't explode when using pyarrow large list type #61091

MarcoGorelli opened this issue Mar 9, 2025 · 1 comment · Fixed by #61105
Assignees
Labels
Arrow pyarrow functionality Bug Reshaping Concat, Merge/Join, Stack/Unstack, Explode

Comments

@MarcoGorelli
Copy link
Member

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 [4]: pd.DataFrame({'a': [[1, 2], [3, 4]]}, dtype=pd.ArrowDtype(pa.list_(pa.int64()))).explode('a')
Out[4]:
   a
0  1
0  2
1  3
1  4

In [5]: pd.DataFrame({'a': [[1, 2], [3, 4]]}, dtype=pd.ArrowDtype(pa.large_list(pa.int64()))).explode('a')
Out[5]:
       a
0  [1 2]
1  [3 4]

Issue Description

For list_, it explodes correctly, but for large_list, it's a no-op

Expected Behavior

   a
0  1
0  2
1  3
1  4

Installed Versions

INSTALLED VERSIONS

commit : 57fd502
python : 3.10.12
python-bits : 64
OS : Linux
OS-release : 5.15.167.4-microsoft-standard-WSL2
Version : #1 SMP Tue Nov 5 00:21:55 UTC 2024
machine : x86_64
processor : x86_64
byteorder : little
LC_ALL : None
LANG : C.UTF-8
LOCALE : en_US.UTF-8

pandas : 3.0.0.dev0+1979.g57fd50221e
numpy : 1.26.4
dateutil : 2.9.0.post0
pip : 25.0.1
Cython : 3.0.12
sphinx : 8.1.3
IPython : 8.33.0
adbc-driver-postgresql: None
adbc-driver-sqlite : None
bs4 : 4.13.3
blosc : None
bottleneck : 1.4.2
fastparquet : 2024.11.0
fsspec : 2025.2.0
html5lib : 1.1
hypothesis : 6.127.5
gcsfs : 2025.2.0
jinja2 : 3.1.5
lxml.etree : 5.3.1
matplotlib : 3.10.1
numba : 0.61.0
numexpr : 2.10.2
odfpy : None
openpyxl : 3.1.5
psycopg2 : 2.9.10
pymysql : 1.4.6
pyarrow : 19.0.1
pyreadstat : 1.2.8
pytest : 8.3.5
python-calamine : None
pytz : 2025.1
pyxlsb : 1.0.10
s3fs : 2025.2.0
scipy : 1.15.2
sqlalchemy : 2.0.38
tables : 3.10.1
tabulate : 0.9.0
xarray : 2024.9.0
xlrd : 2.0.1
xlsxwriter : 3.2.2
zstandard : 0.23.0
tzdata : 2025.1
qtpy : None
pyqt5 : None

@MarcoGorelli MarcoGorelli added Bug Needs Triage Issue that has not been reviewed by a pandas team member labels Mar 9, 2025
@rhshadrach rhshadrach added Arrow pyarrow functionality Reshaping Concat, Merge/Join, Stack/Unstack, Explode and removed Needs Triage Issue that has not been reviewed by a pandas team member labels Mar 11, 2025
@snitish
Copy link
Contributor

snitish commented Mar 11, 2025

take

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
Labels
Arrow pyarrow functionality Bug Reshaping Concat, Merge/Join, Stack/Unstack, Explode
Projects
None yet
Development

Successfully merging a pull request may close this issue.

3 participants