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largelisttype not supported (.from_polars()) #6834

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Modexus opened this issue Apr 24, 2024 · 0 comments · May be fixed by #6835
Open

largelisttype not supported (.from_polars()) #6834

Modexus opened this issue Apr 24, 2024 · 0 comments · May be fixed by #6835

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@Modexus
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Modexus commented Apr 24, 2024 •
edited

Describe the bug

The following code fails because LargeListType is not supported.
This is especially a problem for .from_polars since polars uses LargeListType.

Steps to reproduce the bug

import datasets
import polars as pl

df = pl.DataFrame({"list": [[]]})
datasets.Dataset.from_polars(df)

Expected behavior

Convert LargeListType to list.

Environment info

  • datasets version: 2.19.1.dev0
  • Platform: Linux-6.8.7-200.fc39.x86_64-x86_64-with-glibc2.38
  • Python version: 3.12.2
  • huggingface_hub version: 0.22.2
  • PyArrow version: 16.0.0
  • Pandas version: 2.1.4
  • fsspec version: 2024.3.1
@Modexus Modexus linked a pull request Apr 24, 2024 that will close this issue
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LargeListType support #6834 Modexus/datasets
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@Modexus