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Stop infinite repet... | value:https://api.github.com/repos/huggingface/datasets/issues/8577/comments | value:PR_kwDODunzps8AAAABCjIFdQ | value:closed | value:1 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8577", "html_url": "https://github.com/huggingface/datasets/pull/8577", "diff_url": "https://github.com/huggingface/datasets/pull/8577.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8577.patch", "merged_at": "2026-09-10T13:39:06Z"} | value:2026-09-10T13:39:06Z | value:https://api.github.com/repos/huggingface/datasets/issues/8577/labels{/name} | value:8577 | json:{"login": "Jokasa7", "id": 42598207, "node_id": "MDQ6VXNlcjQyNTk4MjA3", "avatar_url": "https://avatars.githubusercontent.com/u/42598207?v=4", "gravatar_id": "", "url": "https://api.github.com/users/Jokasa7", "html_url": "https://github.com/Jokasa7", "followers_url": "https://api.github.com/users/Jokasa7/followers"... | value:False | true | |||||||||
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Adds a small worked example to the "nested field" JSON section of the loading guide (`docs/source/loading.mdx`), right after the existing `field="data"` example, showing the same mechanism applied to an eval/benchmark run's results file:
```py
{"version": "1.1.0",
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Fixes #8572
A source with no rows still contributes its columns, so horizontal concatenation has to check its row count like any other source. The empty-source filter in `_concatenate_map_style_datasets` ran before the axis dispatch, so on `axis=1` a 0-row source was removed before the "Number of rows must matc... | value:https://api.github.com/repos/huggingface/datasets/issues/8573/comments | value:PR_kwDODunzps8AAAABCcNUwQ | value:open | value:3 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8573", "html_url": "https://github.com/huggingface/datasets/pull/8573", "diff_url": "https://github.com/huggingface/datasets/pull/8573.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8573.patch", "merged_at": null} | value:2026-11-04T02:13:32Z | value:https://api.github.com/repos/huggingface/datasets/issues/8573/labels{/name} | value:8573 | json:{"login": "caiotheodoro", "id": 48462974, "node_id": "MDQ6VXNlcjQ4NDYyOTc0", "avatar_url": "https://avatars.githubusercontent.com/u/48462974?v=4", "gravatar_id": "", "url": "https://api.github.com/users/caiotheodoro", "html_url": "https://github.com/caiotheodoro", "followers_url": "https://api.github.com/users/cai... | value:False | true | |||||||||||
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`concatenate_datasets([ds1, ds2], axis=1)` returns a dataset without `ds2`'s columns when `ds2` has 0 rows, and raises nothing. The row-count check that rejects every other length mismatch never runs.
### Steps to reproduce
```python
from datasets import Dataset, Features, Value, concatenate_datasets
ds1 = Da... | value:https://api.github.com/repos/huggingface/datasets/issues/8572/comments | value:I_kwDODunzps8AAAABP_mhVQ | value:open | value:0 | value:2026-09-06T23:22:23Z | value:https://api.github.com/repos/huggingface/datasets/issues/8572/labels{/name} | value:8572 | json:{"login": "caiotheodoro", "id": 48462974, "node_id": "MDQ6VXNlcjQ4NDYyOTc0", "avatar_url": "https://avatars.githubusercontent.com/u/48462974?v=4", "gravatar_id": "", "url": "https://api.github.com/users/caiotheodoro", "html_url": "https://github.com/caiotheodoro", "followers_url": "https://api.github.com/users/cai... | true | |||||||||||
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Fixes #8570
This PR adds a comprehensive and high-quality Simplified Chinese translation of the project's README (`README.zh.md`) and establishes a seamless bidirectional language switcher in both English and Chinese documentation.
## Summary of Changes
- **New File `README.zh.md`**: F... | value:https://api.github.com/repos/huggingface/datasets/issues/8571/comments | value:PR_kwDODunzps8AAAABCYQTUQ | value:open | value:0 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8571", "html_url": "https://github.com/huggingface/datasets/pull/8571", "diff_url": "https://github.com/huggingface/datasets/pull/8571.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8571.patch", "merged_at": null} | value:2026-09-06T05:03:11Z | value:https://api.github.com/repos/huggingface/datasets/issues/8571/labels{/name} | value:8571 | json:{"login": "JasonYeYuhe", "id": 69640321, "node_id": "MDQ6VXNlcjY5NjQwMzIx", "avatar_url": "https://avatars.githubusercontent.com/u/69640321?v=4", "gravatar_id": "", "url": "https://api.github.com/users/JasonYeYuhe", "html_url": "https://github.com/JasonYeYuhe", "followers_url": "https://api.github.com/users/JasonY... | value:False | true | |||||||||||
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🤗 Datasets is a fundamental library widely used by researchers, data scientists, and developers worldwide, with a large and active Chinese-speaking developer and research community.
Providing an accurate, idiomatic Simplified Chinese translation (`README.zh.md`) along with a language switcher wi... | value:https://api.github.com/repos/huggingface/datasets/issues/8570/comments | value:I_kwDODunzps8AAAABP6jVhA | value:open | value:0 | value:2026-09-06T05:02:49Z | value:https://api.github.com/repos/huggingface/datasets/issues/8570/labels{/name} | value:8570 | json:{"login": "JasonYeYuhe", "id": 69640321, "node_id": "MDQ6VXNlcjY5NjQwMzIx", "avatar_url": "https://avatars.githubusercontent.com/u/69640321?v=4", "gravatar_id": "", "url": "https://api.github.com/users/JasonYeYuhe", "html_url": "https://github.com/JasonYeYuhe", "followers_url": "https://api.github.com/users/JasonY... | true | |||||||||||
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Calling `.skip()` on an iterable dataset that already went through `split_dataset_by_node` cancels the node split. Each rank then iterates every shard, so a distributed run sees each example `world_size` times.
`SkipExamplesIterable.shard_data_sources` returns `self` when `split_when_shardi... | value:https://api.github.com/repos/huggingface/datasets/issues/8568/comments | value:I_kwDODunzps8AAAABP6YOFg | value:closed | value:0 | value:2026-09-10T13:35:11Z | value:https://api.github.com/repos/huggingface/datasets/issues/8568/labels{/name} | value:8568 | json:{"login": "ebarkhordar", "id": 22658149, "node_id": "MDQ6VXNlcjIyNjU4MTQ5", "avatar_url": "https://avatars.githubusercontent.com/u/22658149?v=4", "gravatar_id": "", "url": "https://api.github.com/users/ebarkhordar", "html_url": "https://github.com/ebarkhordar", "followers_url": "https://api.github.com/users/ebarkh... | true | ||||||||
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```
>>> Pdf().decode_example({"path": "https://example.com/a.pdf", "bytes": None})
TypeError: 'NoneType' object is not subscriptable # src/datasets/features/pdf.py:158
```
`string_to_dict` returns `None` when the URL does not ma... | value:https://api.github.com/repos/huggingface/datasets/issues/8566/comments | value:PR_kwDODunzps8AAAABCPzgMA | value:closed | value:2 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8566", "html_url": "https://github.com/huggingface/datasets/pull/8566", "diff_url": "https://github.com/huggingface/datasets/pull/8566.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8566.patch", "merged_at": "2026-09-09T14:08:29Z"} | value:2026-09-09T14:08:29Z | value:https://api.github.com/repos/huggingface/datasets/issues/8566/labels{/name} | value:8566 | json:{"login": "behroozazarkhalili", "id": 80390531, "node_id": "MDQ6VXNlcjgwMzkwNTMx", "avatar_url": "https://avatars.githubusercontent.com/u/80390531?v=4", "gravatar_id": "", "url": "https://api.github.com/users/behroozazarkhalili", "html_url": "https://github.com/behroozazarkhalili", "followers_url": "https://api.gi... | value:False | true | |||||||||
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```python
split_dataset_by_node(ds, rank, world_size, strategy="auto" | "shards" | "examples")
```
- `"auto"`: unchanged. Shards are assigned when `num_shards % world_size == 0`, otherwise each node keeps one... | value:https://api.github.com/repos/huggingface/datasets/issues/8565/comments | value:PR_kwDODunzps8AAAABCPxt9Q | value:closed | value:2 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8565", "html_url": "https://github.com/huggingface/datasets/pull/8565", "diff_url": "https://github.com/huggingface/datasets/pull/8565.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8565.patch", "merged_at": "2026-09-09T13:54:28Z"} | value:2026-09-09T13:54:28Z | value:https://api.github.com/repos/huggingface/datasets/issues/8565/labels{/name} | value:8565 | json:{"login": "behroozazarkhalili", "id": 80390531, "node_id": "MDQ6VXNlcjgwMzkwNTMx", "avatar_url": "https://avatars.githubusercontent.com/u/80390531?v=4", "gravatar_id": "", "url": "https://api.github.com/users/behroozazarkhalili", "html_url": "https://github.com/behroozazarkhalili", "followers_url": "https://api.gi... | value:False | true | |||||||||
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Four feature classes show a repr in their `Examples` block that they cannot print.
```
>>> ds.features["image"]
Image(decode=True, id=None)
```
`Image`, `Pdf`, `Nifti` and `Video` all declare `id: Optional[str] = field(default=None, repr=False)`, so `id=None` never appears. On top of that `Imag... | value:https://api.github.com/repos/huggingface/datasets/issues/8564/comments | value:PR_kwDODunzps8AAAABCOtV6g | value:open | value:2 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8564", "html_url": "https://github.com/huggingface/datasets/pull/8564", "diff_url": "https://github.com/huggingface/datasets/pull/8564.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8564.patch", "merged_at": null} | value:2026-10-22T18:18:05Z | value:https://api.github.com/repos/huggingface/datasets/issues/8564/labels{/name} | value:8564 | json:{"login": "vineethsaivs", "id": 42468190, "node_id": "MDQ6VXNlcjQyNDY4MTkw", "avatar_url": "https://avatars.githubusercontent.com/u/42468190?v=4", "gravatar_id": "", "url": "https://api.github.com/users/vineethsaivs", "html_url": "https://github.com/vineethsaivs", "followers_url": "https://api.github.com/users/vin... | value:False | true | |||||||||||
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- validate local files referenced by folder metadata during example generation
- report both the missing file and the metadata file that references it
- preserve lazy access for remote files
## Testing
- `pytest -q tests/packaged_modules/test_folder_based_builder.py tests/packaged_modules/test_image... | value:https://api.github.com/repos/huggingface/datasets/issues/8563/comments | value:PR_kwDODunzps8AAAABCOPtdA | value:open | value:2 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8563", "html_url": "https://github.com/huggingface/datasets/pull/8563", "diff_url": "https://github.com/huggingface/datasets/pull/8563.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8563.patch", "merged_at": null} | value:2026-09-05T19:28:22Z | value:https://api.github.com/repos/huggingface/datasets/issues/8563/labels{/name} | value:8563 | json:{"login": "tadad", "id": 43223192, "node_id": "MDQ6VXNlcjQzMjIzMTky", "avatar_url": "https://avatars.githubusercontent.com/u/43223192?v=4", "gravatar_id": "", "url": "https://api.github.com/users/tadad", "html_url": "https://github.com/tadad", "followers_url": "https://api.github.com/users/tadad/followers", "follo... | value:False | true | |||||||||||
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Under numpy format a column holding zero rows came back as float32 no matter what dtype it was declared with, while the same column kept its dtype as soon as it held one row. pandas and arrow were unaffected.
```python
feats = Features({"a": Value("int64")})
ds = Dataset.from_dict({"a": [1, 2, 3]},... | value:https://api.github.com/repos/huggingface/datasets/issues/8562/comments | value:PR_kwDODunzps8AAAABCItE_A | value:open | value:0 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8562", "html_url": "https://github.com/huggingface/datasets/pull/8562", "diff_url": "https://github.com/huggingface/datasets/pull/8562.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8562.patch", "merged_at": null} | value:2026-09-04T20:30:36Z | value:https://api.github.com/repos/huggingface/datasets/issues/8562/labels{/name} | value:8562 | json:{"login": "akashjainn", "id": 80935005, "node_id": "MDQ6VXNlcjgwOTM1MDA1", "avatar_url": "https://avatars.githubusercontent.com/u/80935005?v=4", "gravatar_id": "", "url": "https://api.github.com/users/akashjainn", "html_url": "https://github.com/akashjainn", "followers_url": "https://api.github.com/users/akashjain... | value:False | true | |||||||||||
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- bump the fsspec upper bound from 2026.6.0 to 2026.7.0
- keep the existing minimum version unchanged
Fixes #8560
## Tests
- python -m pytest -q tests/test_filesystem.py (8 passed, 2 skipped)
- python -m pytest -q tests/test_file_utils.py tests/test_data_files.py tests/test_streaming_download_manag... | value:https://api.github.com/repos/huggingface/datasets/issues/8561/comments | value:PR_kwDODunzps8AAAABCH5b_w | value:closed | value:1 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8561", "html_url": "https://github.com/huggingface/datasets/pull/8561", "diff_url": "https://github.com/huggingface/datasets/pull/8561.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8561.patch", "merged_at": "2026-09-10T13:34:42Z"} | value:2026-09-10T13:34:42Z | value:https://api.github.com/repos/huggingface/datasets/issues/8561/labels{/name} | value:8561 | json:{"login": "roshanjrajan", "id": 13341160, "node_id": "MDQ6VXNlcjEzMzQxMTYw", "avatar_url": "https://avatars.githubusercontent.com/u/13341160?v=4", "gravatar_id": "", "url": "https://api.github.com/users/roshanjrajan", "html_url": "https://github.com/roshanjrajan", "followers_url": "https://api.github.com/users/ros... | value:False | true | |||||||||
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Can open a PR! | value:https://api.github.com/repos/huggingface/datasets/issues/8560/comments | value:I_kwDODunzps8AAAABPmcRAw | value:closed | value:0 | value:2026-09-10T13:34:43Z | value:https://api.github.com/repos/huggingface/datasets/issues/8560/labels{/name} | value:8560 | json:{"login": "roshanjrajan", "id": 13341160, "node_id": "MDQ6VXNlcjEzMzQxMTYw", "avatar_url": "https://avatars.githubusercontent.com/u/13341160?v=4", "gravatar_id": "", "url": "https://api.github.com/users/roshanjrajan", "html_url": "https://github.com/roshanjrajan", "followers_url": "https://api.github.com/users/ros... | true | ||||||||
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`Dataset.repeat`'s example calls `ds.take(2).repeat(2)`, which returns **four** rows, but the output printed under it has **six**: three distinct reviews, each twice.
`IterableDataset.repeat` carries the same example, and its `load_dataset` call is missing `streaming=True`, so it builds a `Dat... | value:https://api.github.com/repos/huggingface/datasets/issues/8559/comments | value:PR_kwDODunzps8AAAABCHXIsg | value:open | value:1 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8559", "html_url": "https://github.com/huggingface/datasets/pull/8559", "diff_url": "https://github.com/huggingface/datasets/pull/8559.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8559.patch", "merged_at": null} | value:2026-11-05T23:38:53Z | value:https://api.github.com/repos/huggingface/datasets/issues/8559/labels{/name} | value:8559 | json:{"login": "vineethsaivs", "id": 42468190, "node_id": "MDQ6VXNlcjQyNDY4MTkw", "avatar_url": "https://avatars.githubusercontent.com/u/42468190?v=4", "gravatar_id": "", "url": "https://api.github.com/users/vineethsaivs", "html_url": "https://github.com/vineethsaivs", "followers_url": "https://api.github.com/users/vin... | value:False | true | |||||||||||
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## Root cause
`_prepare_split_single` finalises the writer inside a `finally` block, in both builders (`builder.py:1558-1563` for `GeneratorBasedBuilder`, `builder.py:1864-1869` for `ArrowBasedBuilder`):
```python
finally:
yield job_id, False, num_examples_progress_update
num_shards = shar... | value:https://api.github.com/repos/huggingface/datasets/issues/8558/comments | value:PR_kwDODunzps8AAAABB-FZdw | value:open | value:3 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8558", "html_url": "https://github.com/huggingface/datasets/pull/8558", "diff_url": "https://github.com/huggingface/datasets/pull/8558.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8558.patch", "merged_at": null} | value:2026-09-18T02:24:25Z | value:https://api.github.com/repos/huggingface/datasets/issues/8558/labels{/name} | value:8558 | json:{"login": "antnewman", "id": 13312614, "node_id": "MDQ6VXNlcjEzMzEyNjE0", "avatar_url": "https://avatars.githubusercontent.com/u/13312614?v=4", "gravatar_id": "", "url": "https://api.github.com/users/antnewman", "html_url": "https://github.com/antnewman", "followers_url": "https://api.github.com/users/antnewman/fo... | value:False | true | |||||||||||
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## What
- `.jxl` added to the `imagefolder` and `webdataset` image extensions.
- `Image.decode_example` now imports the third-party Pillow plugins that are installed (`pillow_jxl` for now) before calling `PIL.Image.open`, via a small `_import_pil_plugins()` helper and a `config.PILLOW_JXL_AVAILABLE... | value:https://api.github.com/repos/huggingface/datasets/issues/8557/comments | value:PR_kwDODunzps8AAAABB8bvfQ | value:open | value:3 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8557", "html_url": "https://github.com/huggingface/datasets/pull/8557", "diff_url": "https://github.com/huggingface/datasets/pull/8557.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8557.patch", "merged_at": null} | value:2026-10-15T18:35:15Z | value:https://api.github.com/repos/huggingface/datasets/issues/8557/labels{/name} | value:8557 | json:{"login": "jayzuccarelli", "id": 11176606, "node_id": "MDQ6VXNlcjExMTc2NjA2", "avatar_url": "https://avatars.githubusercontent.com/u/11176606?v=4", "gravatar_id": "", "url": "https://api.github.com/users/jayzuccarelli", "html_url": "https://github.com/jayzuccarelli", "followers_url": "https://api.github.com/users/... | value:False | true | |||||||||||
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`batch(0)` and `batch(-1)` silently returned the whole dataset instead of raising an error. This is dangerous because a batch_size computed at runtime that comes out as 0 (e.g., from an empty config or integer division) would silently return the entire dataset.
The fix adds validation to both `Da... | value:https://api.github.com/repos/huggingface/datasets/issues/8556/comments | value:PR_kwDODunzps8AAAABB38ncA | value:open | value:0 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8556", "html_url": "https://github.com/huggingface/datasets/pull/8556", "diff_url": "https://github.com/huggingface/datasets/pull/8556.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8556.patch", "merged_at": null} | value:2026-09-02T09:30:54Z | value:https://api.github.com/repos/huggingface/datasets/issues/8556/labels{/name} | value:8556 | json:{"login": "dajiaohuang", "id": 108231307, "node_id": "U_kgDOBnN6iw", "avatar_url": "https://avatars.githubusercontent.com/u/108231307?v=4", "gravatar_id": "", "url": "https://api.github.com/users/dajiaohuang", "html_url": "https://github.com/dajiaohuang", "followers_url": "https://api.github.com/users/dajiaohuang/... | value:False | true | |||||||||||
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When using negative percentages like `train[-1%:]`, the sign was lost after rounding. For example, -1% of 30 examples rounds to 0, so `train[-1%:]` would return the whole dataset instead of the last 1%.
The fix converts negative percentages to their positive equivalents (`100 + from_%`) before ro... | value:https://api.github.com/repos/huggingface/datasets/issues/8555/comments | value:PR_kwDODunzps8AAAABB376LQ | value:open | value:2 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8555", "html_url": "https://github.com/huggingface/datasets/pull/8555", "diff_url": "https://github.com/huggingface/datasets/pull/8555.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8555.patch", "merged_at": null} | value:2026-09-04T07:14:09Z | value:https://api.github.com/repos/huggingface/datasets/issues/8555/labels{/name} | value:8555 | json:{"login": "dajiaohuang", "id": 108231307, "node_id": "U_kgDOBnN6iw", "avatar_url": "https://avatars.githubusercontent.com/u/108231307?v=4", "gravatar_id": "", "url": "https://api.github.com/users/dajiaohuang", "html_url": "https://github.com/dajiaohuang", "followers_url": "https://api.github.com/users/dajiaohuang/... | value:False | true | |||||||||||
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Dataset.select raised OverflowError for negative indices like -1, even though they are valid (e.g., -1 means last element). The issue was that pyarrow's uint64 array can't hold negative values.
The fix normalizes negative indices to positive ones after validation but before converting to pyarrow ... | value:https://api.github.com/repos/huggingface/datasets/issues/8554/comments | value:PR_kwDODunzps8AAAABB361jg | value:open | value:0 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8554", "html_url": "https://github.com/huggingface/datasets/pull/8554", "diff_url": "https://github.com/huggingface/datasets/pull/8554.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8554.patch", "merged_at": null} | value:2026-09-02T09:27:18Z | value:https://api.github.com/repos/huggingface/datasets/issues/8554/labels{/name} | value:8554 | json:{"login": "dajiaohuang", "id": 108231307, "node_id": "U_kgDOBnN6iw", "avatar_url": "https://avatars.githubusercontent.com/u/108231307?v=4", "gravatar_id": "", "url": "https://api.github.com/users/dajiaohuang", "html_url": "https://github.com/dajiaohuang", "followers_url": "https://api.github.com/users/dajiaohuang/... | value:False | true | |||||||||||
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ClassLabel.str2int and int2str were validating only the container (the list), not the elements inside it. This caused silent failures:
- `str2int([1])` returned `[1]` instead of raising ValueError
- `int2str([1.7])` returned `['pos']` (truncated float) instead of raising ValueError
## Fix
1. **... | value:https://api.github.com/repos/huggingface/datasets/issues/8553/comments | value:PR_kwDODunzps8AAAABB35yTw | value:open | value:0 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8553", "html_url": "https://github.com/huggingface/datasets/pull/8553", "diff_url": "https://github.com/huggingface/datasets/pull/8553.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8553.patch", "merged_at": null} | value:2026-09-02T09:25:14Z | value:https://api.github.com/repos/huggingface/datasets/issues/8553/labels{/name} | value:8553 | json:{"login": "dajiaohuang", "id": 108231307, "node_id": "U_kgDOBnN6iw", "avatar_url": "https://avatars.githubusercontent.com/u/108231307?v=4", "gravatar_id": "", "url": "https://api.github.com/users/dajiaohuang", "html_url": "https://github.com/dajiaohuang", "followers_url": "https://api.github.com/users/dajiaohuang/... | value:False | true | |||||||||||
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The `xPath.glob` method was double-wrapping storage_options when calling `url_to_fs`.
The `_prepare_path_and_storage_options` function already returns storage_options keyed by protocol (e.g., `{protocol: options}`), but the code was re-wrapping it as `{protocol: {protocol: options}}`, causing fs... | value:https://api.github.com/repos/huggingface/datasets/issues/8552/comments | value:PR_kwDODunzps8AAAABB344Tg | value:open | value:0 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8552", "html_url": "https://github.com/huggingface/datasets/pull/8552", "diff_url": "https://github.com/huggingface/datasets/pull/8552.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8552.patch", "merged_at": null} | value:2026-09-02T09:23:23Z | value:https://api.github.com/repos/huggingface/datasets/issues/8552/labels{/name} | value:8552 | json:{"login": "dajiaohuang", "id": 108231307, "node_id": "U_kgDOBnN6iw", "avatar_url": "https://avatars.githubusercontent.com/u/108231307?v=4", "gravatar_id": "", "url": "https://api.github.com/users/dajiaohuang", "html_url": "https://github.com/dajiaohuang", "followers_url": "https://api.github.com/users/dajiaohuang/... | value:False | true | |||||||||||
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| Location | Documented | Actual signature |
|---|---|---|
| `Dataset.train_test_split` | `train_cache_file_name`, `test_cache_file_name` | `train_indices_cache_file_name`, `tes... | value:https://api.github.com/repos/huggingface/datasets/issues/8551/comments | value:PR_kwDODunzps8AAAABB2KANg | value:open | value:1 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8551", "html_url": "https://github.com/huggingface/datasets/pull/8551", "diff_url": "https://github.com/huggingface/datasets/pull/8551.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8551.patch", "merged_at": null} | value:2026-09-09T13:52:32Z | value:https://api.github.com/repos/huggingface/datasets/issues/8551/labels{/name} | value:8551 | json:{"login": "IshaanPotle", "id": 64418106, "node_id": "MDQ6VXNlcjY0NDE4MTA2", "avatar_url": "https://avatars.githubusercontent.com/u/64418106?v=4", "gravatar_id": "", "url": "https://api.github.com/users/IshaanPotle", "html_url": "https://github.com/IshaanPotle", "followers_url": "https://api.github.com/users/Ishaan... | value:False | true | |||||||||||
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## Summary
- Add a semantic segmentation section on swapping left/right class IDs during horizontal flips
- Show a NumPy-only `set_transform` recipe for the human parsing dataset
- Mention AlbumentationsX as an optional path with license notes
## Test plan
- [x] Docs reviewed loc... | value:https://api.github.com/repos/huggingface/datasets/issues/8550/comments | value:PR_kwDODunzps8AAAABB1zrzA | value:open | value:0 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8550", "html_url": "https://github.com/huggingface/datasets/pull/8550", "diff_url": "https://github.com/huggingface/datasets/pull/8550.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8550.patch", "merged_at": null} | value:2026-09-02T03:48:29Z | value:https://api.github.com/repos/huggingface/datasets/issues/8550/labels{/name} | value:8550 | json:{"login": "ShamikOfficial", "id": 51356328, "node_id": "MDQ6VXNlcjUxMzU2MzI4", "avatar_url": "https://avatars.githubusercontent.com/u/51356328?v=4", "gravatar_id": "", "url": "https://api.github.com/users/ShamikOfficial", "html_url": "https://github.com/ShamikOfficial", "followers_url": "https://api.github.com/use... | value:False | true | |||||||||||
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## Summary
- Replace `list[PathLike]` with `Sequence[PathLike]` in `from_csv`, `from_json`, `from_parquet`, and `from_text` signatures
## Test plan
- [x] Type-only change; no runtime behavior change | value:https://api.github.com/repos/huggingface/datasets/issues/8549/comments | value:PR_kwDODunzps8AAAABB1zgdg | value:open | value:0 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8549", "html_url": "https://github.com/huggingface/datasets/pull/8549", "diff_url": "https://github.com/huggingface/datasets/pull/8549.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8549.patch", "merged_at": null} | value:2026-09-02T03:48:00Z | value:https://api.github.com/repos/huggingface/datasets/issues/8549/labels{/name} | value:8549 | json:{"login": "ShamikOfficial", "id": 51356328, "node_id": "MDQ6VXNlcjUxMzU2MzI4", "avatar_url": "https://avatars.githubusercontent.com/u/51356328?v=4", "gravatar_id": "", "url": "https://api.github.com/users/ShamikOfficial", "html_url": "https://github.com/ShamikOfficial", "followers_url": "https://api.github.com/use... | value:False | true | |||||||||||
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## Summary
- Convert path-like arguments with `os.fspath` before `url_to_fs` in Dataset, DatasetDict, and `load_from_disk`
- Add regression test for `pathlib.Path` round-trip
## Test plan
- [x] Added `test_save_and_load_from_disk_with_pathlib` | value:https://api.github.com/repos/huggingface/datasets/issues/8548/comments | value:PR_kwDODunzps8AAAABB1yTmQ | value:open | value:0 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8548", "html_url": "https://github.com/huggingface/datasets/pull/8548", "diff_url": "https://github.com/huggingface/datasets/pull/8548.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8548.patch", "merged_at": null} | value:2026-09-02T03:44:01Z | value:https://api.github.com/repos/huggingface/datasets/issues/8548/labels{/name} | value:8548 | json:{"login": "ShamikOfficial", "id": 51356328, "node_id": "MDQ6VXNlcjUxMzU2MzI4", "avatar_url": "https://avatars.githubusercontent.com/u/51356328?v=4", "gravatar_id": "", "url": "https://api.github.com/users/ShamikOfficial", "html_url": "https://github.com/ShamikOfficial", "followers_url": "https://api.github.com/use... | value:False | true | |||||||||||
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## Summary
- Cross-link file and folder builders with the loading guide
- Clarify in-memory vs file-based dataset creation paths
- Link to the repository structure guide
## Test plan
- [x] Docs links reviewed locally | value:https://api.github.com/repos/huggingface/datasets/issues/8547/comments | value:PR_kwDODunzps8AAAABBzza-w | value:open | value:0 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8547", "html_url": "https://github.com/huggingface/datasets/pull/8547", "diff_url": "https://github.com/huggingface/datasets/pull/8547.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8547.patch", "merged_at": null} | value:2026-09-01T21:17:17Z | value:https://api.github.com/repos/huggingface/datasets/issues/8547/labels{/name} | value:8547 | json:{"login": "ShamikOfficial", "id": 51356328, "node_id": "MDQ6VXNlcjUxMzU2MzI4", "avatar_url": "https://avatars.githubusercontent.com/u/51356328?v=4", "gravatar_id": "", "url": "https://api.github.com/users/ShamikOfficial", "html_url": "https://github.com/ShamikOfficial", "followers_url": "https://api.github.com/use... | value:False | true | |||||||||||
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## Summary
- Add repository structure to the Tutorials section in the docs navigation
- Link the guide from the docs index and quickstart
## Test plan
- [x] Docs navigation and links reviewed locally
Made with [Cursor](https://cursor.com) | value:https://api.github.com/repos/huggingface/datasets/issues/8546/comments | value:PR_kwDODunzps8AAAABBzw9fg | value:open | value:0 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8546", "html_url": "https://github.com/huggingface/datasets/pull/8546", "diff_url": "https://github.com/huggingface/datasets/pull/8546.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8546.patch", "merged_at": null} | value:2026-09-01T21:11:21Z | value:https://api.github.com/repos/huggingface/datasets/issues/8546/labels{/name} | value:8546 | json:{"login": "ShamikOfficial", "id": 51356328, "node_id": "MDQ6VXNlcjUxMzU2MzI4", "avatar_url": "https://avatars.githubusercontent.com/u/51356328?v=4", "gravatar_id": "", "url": "https://api.github.com/users/ShamikOfficial", "html_url": "https://github.com/ShamikOfficial", "followers_url": "https://api.github.com/use... | value:False | true | |||||||||||
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## Summary
Expanded the **Improve performance** section in `docs/source/cache.mdx` with three practical guides:
- **Maximize iteration speed** - in-memory loading, `num_proc`, batched `.map()`, caching
- **Minimize RAM usage** - streaming, column selection, cache cleanup
- **Minim... | value:https://api.github.com/repos/huggingface/datasets/issues/8545/comments | value:PR_kwDODunzps8AAAABBzfsnw | value:open | value:0 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8545", "html_url": "https://github.com/huggingface/datasets/pull/8545", "diff_url": "https://github.com/huggingface/datasets/pull/8545.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8545.patch", "merged_at": null} | value:2026-09-01T20:36:42Z | value:https://api.github.com/repos/huggingface/datasets/issues/8545/labels{/name} | value:8545 | json:{"login": "ShamikOfficial", "id": 51356328, "node_id": "MDQ6VXNlcjUxMzU2MzI4", "avatar_url": "https://avatars.githubusercontent.com/u/51356328?v=4", "gravatar_id": "", "url": "https://api.github.com/users/ShamikOfficial", "html_url": "https://github.com/ShamikOfficial", "followers_url": "https://api.github.com/use... | value:False | true | |||||||||||
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### Root cause
`_prepare_path_and_storage_options` returns storage options already keyed by protocol. That contract is stated in the docstring of `_prepare_single_hop_path_and_storage_options` ("Storage options are formatted in the form {protocol: storage_options_for_protocol}") and applied just bef... | value:https://api.github.com/repos/huggingface/datasets/issues/8544/comments | value:PR_kwDODunzps8AAAABBtRb4w | value:closed | value:2 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8544", "html_url": "https://github.com/huggingface/datasets/pull/8544", "diff_url": "https://github.com/huggingface/datasets/pull/8544.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8544.patch", "merged_at": null} | value:2026-10-14T23:39:25Z | value:https://api.github.com/repos/huggingface/datasets/issues/8544/labels{/name} | value:8544 | json:{"login": "ebarkhordar", "id": 22658149, "node_id": "MDQ6VXNlcjIyNjU4MTQ5", "avatar_url": "https://avatars.githubusercontent.com/u/22658149?v=4", "gravatar_id": "", "url": "https://api.github.com/users/ebarkhordar", "html_url": "https://github.com/ebarkhordar", "followers_url": "https://api.github.com/users/ebarkh... | value:False | true | |||||||||
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`xPath.glob` adds a second protocol key to the storage options before passing them to `url_to_fs`, so fsspec receives `https={'https': {...}}` instead of `https={...}`.
`_prepare_path_and_storage_options` already returns them protocol keyed, and the docstring of `_prepare_single_hop_path_an... | value:https://api.github.com/repos/huggingface/datasets/issues/8543/comments | value:I_kwDODunzps8AAAABPG2gpg | value:open | value:2 | value:2026-09-01T08:48:03Z | value:https://api.github.com/repos/huggingface/datasets/issues/8543/labels{/name} | value:8543 | json:{"login": "ebarkhordar", "id": 22658149, "node_id": "MDQ6VXNlcjIyNjU4MTQ5", "avatar_url": "https://avatars.githubusercontent.com/u/22658149?v=4", "gravatar_id": "", "url": "https://api.github.com/users/ebarkhordar", "html_url": "https://github.com/ebarkhordar", "followers_url": "https://api.github.com/users/ebarkh... | true | |||||||||||
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| Type | Module | `decode_example` returns | Serves |
|---|---|---|---|
| `BioSequence` | `features/bio_sequence.py` | `Bio.SeqRecord.SeqRecord` | FASTA #7923, FASTQ #7924, GenBank #... | value:https://api.github.com/repos/huggingface/datasets/issues/8542/comments | value:PR_kwDODunzps8AAAABBsDRGw | value:closed | value:6 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8542", "html_url": "https://github.com/huggingface/datasets/pull/8542", "diff_url": "https://github.com/huggingface/datasets/pull/8542.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8542.patch", "merged_at": "2026-09-10T12:40:54Z"} | value:2026-09-11T19:59:10Z | value:https://api.github.com/repos/huggingface/datasets/issues/8542/labels{/name} | value:8542 | json:{"login": "behroozazarkhalili", "id": 80390531, "node_id": "MDQ6VXNlcjgwMzkwNTMx", "avatar_url": "https://avatars.githubusercontent.com/u/80390531?v=4", "gravatar_id": "", "url": "https://api.github.com/users/behroozazarkhalili", "html_url": "https://github.com/behroozazarkhalili", "followers_url": "https://api.gi... | value:False | true | |||||||||
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```python
if yaml_data.get("splits") is n... | value:https://api.github.com/repos/huggingface/datasets/issues/8541/comments | value:PR_kwDODunzps8AAAABBpLTzg | value:closed | value:2 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8541", "html_url": "https://github.com/huggingface/datasets/pull/8541", "diff_url": "https://github.com/huggingface/datasets/pull/8541.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8541.patch", "merged_at": null} | value:2026-09-30T18:59:46Z | value:https://api.github.com/repos/huggingface/datasets/issues/8541/labels{/name} | value:8541 | json:{"login": "ebarkhordar", "id": 22658149, "node_id": "MDQ6VXNlcjIyNjU4MTQ5", "avatar_url": "https://avatars.githubusercontent.com/u/22658149?v=4", "gravatar_id": "", "url": "https://api.github.com/users/ebarkhordar", "html_url": "https://github.com/ebarkhordar", "followers_url": "https://api.github.com/users/ebarkh... | value:False | true | |||||||||
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`convert_file_size_to_int()` treats a lowercase trailing `b` as bits and divides by 8, but only for the decimal units. The binary units ignore the suffix entirely:
```python
>>> from datasets.utils.py_utils import convert_file_size_to_int
>>> convert_file_size_to_int("1Gb") # gigabit, correct
125... | value:https://api.github.com/repos/huggingface/datasets/issues/8539/comments | value:PR_kwDODunzps8AAAABBhiXpQ | value:open | value:1 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8539", "html_url": "https://github.com/huggingface/datasets/pull/8539", "diff_url": "https://github.com/huggingface/datasets/pull/8539.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8539.patch", "merged_at": null} | value:2026-10-22T18:18:01Z | value:https://api.github.com/repos/huggingface/datasets/issues/8539/labels{/name} | value:8539 | json:{"login": "vineethsaivs", "id": 42468190, "node_id": "MDQ6VXNlcjQyNDY4MTkw", "avatar_url": "https://avatars.githubusercontent.com/u/42468190?v=4", "gravatar_id": "", "url": "https://api.github.com/users/vineethsaivs", "html_url": "https://github.com/vineethsaivs", "followers_url": "https://api.github.com/users/vin... | value:False | true | |||||||||||
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Fixed a stray closing bracket in about_mapstyle_vs_iterable.mdx that broke the markdown link to the audio_load guide.
## Why
A small, objectively-verifiable improvement (broken-link) found during a
daily open-source maintenance pass (2026-08-30).
## How verified
Read the source line, confirmed the audio... | value:https://api.github.com/repos/huggingface/datasets/issues/8536/comments | value:PR_kwDODunzps8AAAABBfvMuQ | value:open | value:0 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8536", "html_url": "https://github.com/huggingface/datasets/pull/8536", "diff_url": "https://github.com/huggingface/datasets/pull/8536.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8536.patch", "merged_at": null} | value:2026-10-09T19:53:05Z | value:https://api.github.com/repos/huggingface/datasets/issues/8536/labels{/name} | value:8536 | json:{"login": "aarushkandukoori", "id": 66923736, "node_id": "MDQ6VXNlcjY2OTIzNzM2", "avatar_url": "https://avatars.githubusercontent.com/u/66923736?v=4", "gravatar_id": "", "url": "https://api.github.com/users/aarushkandukoori", "html_url": "https://github.com/aarushkandukoori", "followers_url": "https://api.github.c... | value:False | true | |||||||||||
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Two `ConllConfig` arguments reach low-level code before anything validates them, so the resulting error never mentions the argument that is wrong. Both arrive wrapped in `DatasetGenerationError: An error occurred while generating the dataset`:
```python
load_dataset("conll", data_files=path, column_... | value:https://api.github.com/repos/huggingface/datasets/issues/8535/comments | value:PR_kwDODunzps8AAAABBfNdjg | value:open | value:0 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8535", "html_url": "https://github.com/huggingface/datasets/pull/8535", "diff_url": "https://github.com/huggingface/datasets/pull/8535.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8535.patch", "merged_at": null} | value:2026-09-02T01:22:14Z | value:https://api.github.com/repos/huggingface/datasets/issues/8535/labels{/name} | value:8535 | json:{"login": "LeSingh1", "id": 197028264, "node_id": "U_kgDOC75pqA", "avatar_url": "https://avatars.githubusercontent.com/u/197028264?v=4", "gravatar_id": "", "url": "https://api.github.com/users/LeSingh1", "html_url": "https://github.com/LeSingh1", "followers_url": "https://api.github.com/users/LeSingh1/followers", ... | value:False | true | |||||||||||
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`ParquetConfig` and `VortexConfig` declare `on_bad_files: Literal["error", "warn", "skip"]` but never check it, and the code branches as `if "error" / elif "warn" / else`. Anything unrecognised lands in the permissive `else`.
So a typo in the *strict* value silently selects the *least* strict behavi... | value:https://api.github.com/repos/huggingface/datasets/issues/8534/comments | value:PR_kwDODunzps8AAAABBfMvvw | value:open | value:0 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8534", "html_url": "https://github.com/huggingface/datasets/pull/8534", "diff_url": "https://github.com/huggingface/datasets/pull/8534.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8534.patch", "merged_at": null} | value:2026-08-30T06:42:06Z | value:https://api.github.com/repos/huggingface/datasets/issues/8534/labels{/name} | value:8534 | json:{"login": "LeSingh1", "id": 197028264, "node_id": "U_kgDOC75pqA", "avatar_url": "https://avatars.githubusercontent.com/u/197028264?v=4", "gravatar_id": "", "url": "https://api.github.com/users/LeSingh1", "html_url": "https://github.com/LeSingh1", "followers_url": "https://api.github.com/users/LeSingh1/followers", ... | value:False | true | |||||||||||
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`Text._generate_tables` branches on `sample_by` as `if "line" / elif "paragraph" / elif "document"` with no fallback, and `TextConfig` never validates the value. An unrecognised one therefore produces no rows at all, and the load fails much later on schema inference:
```python
load_dataset("text", d... | value:https://api.github.com/repos/huggingface/datasets/issues/8533/comments | value:PR_kwDODunzps8AAAABBfMSPQ | value:open | value:0 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8533", "html_url": "https://github.com/huggingface/datasets/pull/8533", "diff_url": "https://github.com/huggingface/datasets/pull/8533.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8533.patch", "merged_at": null} | value:2026-08-30T06:38:59Z | value:https://api.github.com/repos/huggingface/datasets/issues/8533/labels{/name} | value:8533 | json:{"login": "LeSingh1", "id": 197028264, "node_id": "U_kgDOC75pqA", "avatar_url": "https://avatars.githubusercontent.com/u/197028264?v=4", "gravatar_id": "", "url": "https://api.github.com/users/LeSingh1", "html_url": "https://github.com/LeSingh1", "followers_url": "https://api.github.com/users/LeSingh1/followers", ... | value:False | true | |||||||||||
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`tests/test_file_utils.py` imports `zstandard` at module level, so without it installed the entire file fails to collect:
```
ERROR tests/test_file_utils.py
E ModuleNotFoundError: No module named 'zstandard'
!!!!! Interrupted: 1 error during collection !!!!!
```
136 tests are lost, almost non... | value:https://api.github.com/repos/huggingface/datasets/issues/8532/comments | value:PR_kwDODunzps8AAAABBfLVqA | value:open | value:0 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8532", "html_url": "https://github.com/huggingface/datasets/pull/8532", "diff_url": "https://github.com/huggingface/datasets/pull/8532.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8532.patch", "merged_at": null} | value:2026-08-30T06:32:43Z | value:https://api.github.com/repos/huggingface/datasets/issues/8532/labels{/name} | value:8532 | json:{"login": "LeSingh1", "id": 197028264, "node_id": "U_kgDOC75pqA", "avatar_url": "https://avatars.githubusercontent.com/u/197028264?v=4", "gravatar_id": "", "url": "https://api.github.com/users/LeSingh1", "html_url": "https://github.com/LeSingh1", "followers_url": "https://api.github.com/users/LeSingh1/followers", ... | value:False | true | |||||||||||
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`test_dataset_to_iterable_dataset` fails when torch is not installed:
```
FAILED tests/test_arrow_dataset.py::test_dataset_to_iterable_dataset
E ValueError: PyTorch needs to be installed to be able to return PyTorch tensors.
```
torch is an optional dependency, so running the suite without it... | value:https://api.github.com/repos/huggingface/datasets/issues/8531/comments | value:PR_kwDODunzps8AAAABBfK2kQ | value:open | value:0 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8531", "html_url": "https://github.com/huggingface/datasets/pull/8531", "diff_url": "https://github.com/huggingface/datasets/pull/8531.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8531.patch", "merged_at": null} | value:2026-08-30T06:29:27Z | value:https://api.github.com/repos/huggingface/datasets/issues/8531/labels{/name} | value:8531 | json:{"login": "LeSingh1", "id": 197028264, "node_id": "U_kgDOC75pqA", "avatar_url": "https://avatars.githubusercontent.com/u/197028264?v=4", "gravatar_id": "", "url": "https://api.github.com/users/LeSingh1", "html_url": "https://github.com/LeSingh1", "followers_url": "https://api.github.com/users/LeSingh1/followers", ... | value:False | true | |||||||||||
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`test_interleave_dataset_with_sharding` imports `torch.utils.data` and calls `.with_format("torch")`, but it is the only torch-using test in `tests/test_iterable_dataset.py` without `@require_torch`. Without torch installed it fails rather than skipping:
```
FAILED tests/test_iterable_dataset.py... | value:https://api.github.com/repos/huggingface/datasets/issues/8530/comments | value:PR_kwDODunzps8AAAABBfKesQ | value:open | value:0 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8530", "html_url": "https://github.com/huggingface/datasets/pull/8530", "diff_url": "https://github.com/huggingface/datasets/pull/8530.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8530.patch", "merged_at": null} | value:2026-08-30T06:26:52Z | value:https://api.github.com/repos/huggingface/datasets/issues/8530/labels{/name} | value:8530 | json:{"login": "LeSingh1", "id": 197028264, "node_id": "U_kgDOC75pqA", "avatar_url": "https://avatars.githubusercontent.com/u/197028264?v=4", "gravatar_id": "", "url": "https://api.github.com/users/LeSingh1", "html_url": "https://github.com/LeSingh1", "followers_url": "https://api.github.com/users/LeSingh1/followers", ... | value:False | true | |||||||||||
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`Dataset.remove_columns` does not deduplicate its argument, so a repeated name deletes the same feature twice:
```python
d = Dataset.from_dict({"a": [1, 2], "b": ["x", "y"]})
d.remove_columns(["a", "a"])
# KeyError: 'a'
```
The second `del dataset._info.features[column_name]` raises a bare `KeyErro... | value:https://api.github.com/repos/huggingface/datasets/issues/8529/comments | value:PR_kwDODunzps8AAAABBfJZAw | value:open | value:0 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8529", "html_url": "https://github.com/huggingface/datasets/pull/8529", "diff_url": "https://github.com/huggingface/datasets/pull/8529.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8529.patch", "merged_at": null} | value:2026-08-30T06:20:32Z | value:https://api.github.com/repos/huggingface/datasets/issues/8529/labels{/name} | value:8529 | json:{"login": "LeSingh1", "id": 197028264, "node_id": "U_kgDOC75pqA", "avatar_url": "https://avatars.githubusercontent.com/u/197028264?v=4", "gravatar_id": "", "url": "https://api.github.com/users/LeSingh1", "html_url": "https://github.com/LeSingh1", "followers_url": "https://api.github.com/users/LeSingh1/followers", ... | value:False | true | |||||||||||
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Two problems in `_rename_columns_fn`, both in the clash check.
**Swapping two names is refused.** The check rejects any new name that is already a column, without noticing that the same mapping renames that column away:
```python
it = Dataset.from_dict({"a": [1, 2], "b": ["x", "y"], "c": [1.0, 2.0]... | value:https://api.github.com/repos/huggingface/datasets/issues/8528/comments | value:PR_kwDODunzps8AAAABBfIs3g | value:open | value:3 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8528", "html_url": "https://github.com/huggingface/datasets/pull/8528", "diff_url": "https://github.com/huggingface/datasets/pull/8528.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8528.patch", "merged_at": null} | value:2026-09-10T13:33:19Z | value:https://api.github.com/repos/huggingface/datasets/issues/8528/labels{/name} | value:8528 | json:{"login": "LeSingh1", "id": 197028264, "node_id": "U_kgDOC75pqA", "avatar_url": "https://avatars.githubusercontent.com/u/197028264?v=4", "gravatar_id": "", "url": "https://api.github.com/users/LeSingh1", "html_url": "https://github.com/LeSingh1", "followers_url": "https://api.github.com/users/LeSingh1/followers", ... | value:False | true | |||||||||||
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`input_columns` naming a column that does not exist is not checked on `IterableDataset`. The name is only looked up while iterating, so the call that is actually wrong succeeds and the failure arrives later, detached from its cause:
```python
it = Dataset.from_dict({"a": [1, 2], "b": ["x", "y"]}).to... | value:https://api.github.com/repos/huggingface/datasets/issues/8527/comments | value:PR_kwDODunzps8AAAABBfIR9Q | value:open | value:0 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8527", "html_url": "https://github.com/huggingface/datasets/pull/8527", "diff_url": "https://github.com/huggingface/datasets/pull/8527.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8527.patch", "merged_at": null} | value:2026-08-30T06:11:54Z | value:https://api.github.com/repos/huggingface/datasets/issues/8527/labels{/name} | value:8527 | json:{"login": "LeSingh1", "id": 197028264, "node_id": "U_kgDOC75pqA", "avatar_url": "https://avatars.githubusercontent.com/u/197028264?v=4", "gravatar_id": "", "url": "https://api.github.com/users/LeSingh1", "html_url": "https://github.com/LeSingh1", "followers_url": "https://api.github.com/users/LeSingh1/followers", ... | value:False | true | |||||||||||
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`IterableDataset.skip` and `take` silently treat a negative `n` as zero:
```python
it = Dataset.from_dict({"a": [1, 2, 3, 4]}).to_iterable_dataset()
list(it.skip(-1)) # [{'a': 1}, {'a': 2}, {'a': 3}, {'a': 4}] -- the whole dataset
list(it.take(-1)) # [] -... | value:https://api.github.com/repos/huggingface/datasets/issues/8526/comments | value:PR_kwDODunzps8AAAABBfHWtg | value:open | value:0 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8526", "html_url": "https://github.com/huggingface/datasets/pull/8526", "diff_url": "https://github.com/huggingface/datasets/pull/8526.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8526.patch", "merged_at": null} | value:2026-08-30T06:05:59Z | value:https://api.github.com/repos/huggingface/datasets/issues/8526/labels{/name} | value:8526 | json:{"login": "LeSingh1", "id": 197028264, "node_id": "U_kgDOC75pqA", "avatar_url": "https://avatars.githubusercontent.com/u/197028264?v=4", "gravatar_id": "", "url": "https://api.github.com/users/LeSingh1", "html_url": "https://github.com/LeSingh1", "followers_url": "https://api.github.com/users/LeSingh1/followers", ... | value:False | true | |||||||||||
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Removing a column that does not exist is silently ignored on `IterableDataset`, through either entry point:
```python
it = Dataset.from_dict({"a": [1, 2], "b": ["x", "y"]}).to_iterable_dataset()._resolve_features()
list(it.remove_columns(["nope"])) # [{'a': 1, 'b': 'x'}, ...] -- ... | value:https://api.github.com/repos/huggingface/datasets/issues/8525/comments | value:PR_kwDODunzps8AAAABBfHDsg | value:open | value:0 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8525", "html_url": "https://github.com/huggingface/datasets/pull/8525", "diff_url": "https://github.com/huggingface/datasets/pull/8525.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8525.patch", "merged_at": null} | value:2026-08-30T06:08:19Z | value:https://api.github.com/repos/huggingface/datasets/issues/8525/labels{/name} | value:8525 | json:{"login": "LeSingh1", "id": 197028264, "node_id": "U_kgDOC75pqA", "avatar_url": "https://avatars.githubusercontent.com/u/197028264?v=4", "gravatar_id": "", "url": "https://api.github.com/users/LeSingh1", "html_url": "https://github.com/LeSingh1", "followers_url": "https://api.github.com/users/LeSingh1/followers", ... | value:False | true | |||||||||||
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So for a column like `Array2D(dtype="int32", shape=(None, 2))` with a `No... | value:https://api.github.com/repos/huggingface/datasets/issues/8524/comments | value:PR_kwDODunzps8AAAABBX0Ihg | value:open | value:0 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8524", "html_url": "https://github.com/huggingface/datasets/pull/8524", "diff_url": "https://github.com/huggingface/datasets/pull/8524.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8524.patch", "merged_at": null} | value:2026-10-08T17:10:37Z | value:https://api.github.com/repos/huggingface/datasets/issues/8524/labels{/name} | value:8524 | json:{"login": "Kayvan-Zahiri", "id": 123409429, "node_id": "U_kgDOB1sUFQ", "avatar_url": "https://avatars.githubusercontent.com/u/123409429?v=4", "gravatar_id": "", "url": "https://api.github.com/users/Kayvan-Zahiri", "html_url": "https://github.com/Kayvan-Zahiri", "followers_url": "https://api.github.com/users/Kayvan... | value:False | true | |||||||||||
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Would you be open to a self-contained documentation recipe showing how to relabel directional semantic classes during a horizontal flip? It could be a separate section in [`docs/source/semantic_segmentation.mdx`](https://github.com/huggingface/datasets/blob/main/docs/source/semantic_segmentat... | value:https://api.github.com/repos/huggingface/datasets/issues/8522/comments | value:I_kwDODunzps8AAAABOo45eg | value:open | value:1 | value:2026-09-02T03:48:31Z | value:https://api.github.com/repos/huggingface/datasets/issues/8522/labels{/name} | value:8522 | json:{"login": "ternaus", "id": 5481618, "node_id": "MDQ6VXNlcjU0ODE2MTg=", "avatar_url": "https://avatars.githubusercontent.com/u/5481618?v=4", "gravatar_id": "", "url": "https://api.github.com/users/ternaus", "html_url": "https://github.com/ternaus", "followers_url": "https://api.github.com/users/ternaus/followers", ... | true | |||||||||||
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Adds defensive validation and recovery for malformed nested Arrow arrays returned by pyarrow.json.read_json().
When a batch produces invalid nested offsets, the JSON loader reparses only that batch row by row with pa.Table.from_pylist(), concatenates the rows while preserving late-a... | value:https://api.github.com/repos/huggingface/datasets/issues/8521/comments | value:PR_kwDODunzps8AAAABBS9mvQ | value:closed | value:5 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8521", "html_url": "https://github.com/huggingface/datasets/pull/8521", "diff_url": "https://github.com/huggingface/datasets/pull/8521.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8521.patch", "merged_at": "2026-10-15T12:36:43Z"} | value:2026-10-15T12:36:44Z | value:https://api.github.com/repos/huggingface/datasets/issues/8521/labels{/name} | value:8521 | json:{"login": "FinalSunFlower", "id": 187966628, "node_id": "U_kgDOCzQkpA", "avatar_url": "https://avatars.githubusercontent.com/u/187966628?v=4", "gravatar_id": "", "url": "https://api.github.com/users/FinalSunFlower", "html_url": "https://github.com/FinalSunFlower", "followers_url": "https://api.github.com/users/Fin... | value:False | true | |||||||||
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`storage.to_pylist()` materializes the values as plain Python `int`s, which drops the Arrow value type. `np.array(arr)` on nested lists of Python ints then defaults to `int64`, and `encode_np_array` warns about a downcast to `uint8` that the storage never needed:
```python
arr = np.random.randint(... | value:https://api.github.com/repos/huggingface/datasets/issues/8520/comments | value:PR_kwDODunzps8AAAABBJERrg | value:open | value:1 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8520", "html_url": "https://github.com/huggingface/datasets/pull/8520", "diff_url": "https://github.com/huggingface/datasets/pull/8520.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8520.patch", "merged_at": null} | value:2026-08-28T19:21:36Z | value:https://api.github.com/repos/huggingface/datasets/issues/8520/labels{/name} | value:8520 | json:{"login": "Kayvan-Zahiri", "id": 123409429, "node_id": "U_kgDOB1sUFQ", "avatar_url": "https://avatars.githubusercontent.com/u/123409429?v=4", "gravatar_id": "", "url": "https://api.github.com/users/Kayvan-Zahiri", "html_url": "https://github.com/Kayvan-Zahiri", "followers_url": "https://api.github.com/users/Kayvan... | value:False | true | |||||||||||
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Two problems in `NumpyFormatter`, both falling out of numpy's type hierarchy.
**Scalars.** `np.bool_` and `np.datetime64` are not `np.number`, so `_tensorize`
did not early-return them and `_recursive_tensorize` ran them through
`__array__` first. Row access handed back 0-d `ndarray`s, which are u... | value:https://api.github.com/repos/huggingface/datasets/issues/8519/comments | value:PR_kwDODunzps8AAAABBI4BwQ | value:open | value:1 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8519", "html_url": "https://github.com/huggingface/datasets/pull/8519", "diff_url": "https://github.com/huggingface/datasets/pull/8519.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8519.patch", "merged_at": null} | value:2026-08-29T01:00:38Z | value:https://api.github.com/repos/huggingface/datasets/issues/8519/labels{/name} | value:8519 | json:{"login": "Kayvan-Zahiri", "id": 123409429, "node_id": "U_kgDOB1sUFQ", "avatar_url": "https://avatars.githubusercontent.com/u/123409429?v=4", "gravatar_id": "", "url": "https://api.github.com/users/Kayvan-Zahiri", "html_url": "https://github.com/Kayvan-Zahiri", "followers_url": "https://api.github.com/users/Kayvan... | value:False | true | |||||||||||
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`pa.Schema.__eq__` ignores metadata, so casting int64 storage to a `ClassLabel`
leaves the arrow schema equal and `table_cast` took the
`replace_schema_metadata` branch. That skips `cast_array_to_feature`, and with
it the range check in `ClassLabel.cast_storage`, so an out-of-range label index
was ... | value:https://api.github.com/repos/huggingface/datasets/issues/8518/comments | value:PR_kwDODunzps8AAAABBI1yLw | value:open | value:2 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8518", "html_url": "https://github.com/huggingface/datasets/pull/8518", "diff_url": "https://github.com/huggingface/datasets/pull/8518.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8518.patch", "merged_at": null} | value:2026-10-19T19:12:57Z | value:https://api.github.com/repos/huggingface/datasets/issues/8518/labels{/name} | value:8518 | json:{"login": "Kayvan-Zahiri", "id": 123409429, "node_id": "U_kgDOB1sUFQ", "avatar_url": "https://avatars.githubusercontent.com/u/123409429?v=4", "gravatar_id": "", "url": "https://api.github.com/users/Kayvan-Zahiri", "html_url": "https://github.com/Kayvan-Zahiri", "followers_url": "https://api.github.com/users/Kayvan... | value:False | true | |||||||||||
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## Summary
- Raise a **version-aware** `ImportError` when the A... | value:https://api.github.com/repos/huggingface/datasets/issues/8517/comments | value:PR_kwDODunzps8AAAABBB5iuA | value:closed | value:2 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8517", "html_url": "https://github.com/huggingface/datasets/pull/8517", "diff_url": "https://github.com/huggingface/datasets/pull/8517.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8517.patch", "merged_at": null} | value:2026-10-27T15:59:33Z | value:https://api.github.com/repos/huggingface/datasets/issues/8517/labels{/name} | value:8517 | json:{"login": "AxelNoun", "id": 150222552, "node_id": "U_kgDOCPQ22A", "avatar_url": "https://avatars.githubusercontent.com/u/150222552?v=4", "gravatar_id": "", "url": "https://api.github.com/users/AxelNoun", "html_url": "https://github.com/AxelNoun", "followers_url": "https://api.github.com/users/AxelNoun/followers", ... | value:True | true | |||||||||
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Bug: Image.cast_storage at image.py:266 warns about downcasting int64 to uint8 even though storage is already uint8. When storage is a nested pa.list type like list<item: list<item: list<item: uint8>>>, to_pylist returns Python ints and np.array(arr) w... | value:https://api.github.com/repos/huggingface/datasets/issues/8516/comments | value:PR_kwDODunzps8AAAABBAtkOA | value:open | value:1 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8516", "html_url": "https://github.com/huggingface/datasets/pull/8516", "diff_url": "https://github.com/huggingface/datasets/pull/8516.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8516.patch", "merged_at": null} | value:2026-09-18T13:57:36Z | value:https://api.github.com/repos/huggingface/datasets/issues/8516/labels{/name} | value:8516 | json:{"login": "shoemoney", "id": 444294, "node_id": "MDQ6VXNlcjQ0NDI5NA==", "avatar_url": "https://avatars.githubusercontent.com/u/444294?v=4", "gravatar_id": "", "url": "https://api.github.com/users/shoemoney", "html_url": "https://github.com/shoemoney", "followers_url": "https://api.github.com/users/shoemoney/follow... | value:False | true | |||||||||||
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Fixes #7551.
Datasets loaded from the Hub with a `data_files` override could not be reloaded in offline mode.
During online loading, relative data file patterns are resolved to revision-pinned Hub URLs before computing the cache configuration ID. During offline lookup, only the original unreso... | value:https://api.github.com/repos/huggingface/datasets/issues/8515/comments | value:PR_kwDODunzps8AAAABA_M4eQ | value:open | value:0 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8515", "html_url": "https://github.com/huggingface/datasets/pull/8515", "diff_url": "https://github.com/huggingface/datasets/pull/8515.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8515.patch", "merged_at": null} | value:2026-09-12T12:30:00Z | value:https://api.github.com/repos/huggingface/datasets/issues/8515/labels{/name} | value:8515 | json:{"login": "mdeff", "id": 6806065, "node_id": "MDQ6VXNlcjY4MDYwNjU=", "avatar_url": "https://avatars.githubusercontent.com/u/6806065?v=4", "gravatar_id": "", "url": "https://api.github.com/users/mdeff", "html_url": "https://github.com/mdeff", "followers_url": "https://api.github.com/users/mdeff/followers", "followi... | value:False | true | |||||||||||
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- Guard every `tsfile` SDK import behind `_require_tsfile()` so missing extras raise `ImportError: ... pip install 'datasets[tsfile]'` instead of a bare `ModuleNotFoundError`.
- Add a `tsfile` extra (`tsfile>=2.3.0`), install it in the `tests` extra on Python 3.14 (where it does not conflict with `py... | value:https://api.github.com/repos/huggingface/datasets/issues/8514/comments | value:PR_kwDODunzps8AAAABA2t1tw | value:closed | value:1 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8514", "html_url": "https://github.com/huggingface/datasets/pull/8514", "diff_url": "https://github.com/huggingface/datasets/pull/8514.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8514.patch", "merged_at": null} | value:2026-10-07T10:54:05Z | value:https://api.github.com/repos/huggingface/datasets/issues/8514/labels{/name} | value:8514 | json:{"login": "AxelNoun", "id": 150222552, "node_id": "U_kgDOCPQ22A", "avatar_url": "https://avatars.githubusercontent.com/u/150222552?v=4", "gravatar_id": "", "url": "https://api.github.com/users/AxelNoun", "html_url": "https://github.com/AxelNoun", "followers_url": "https://api.github.com/users/AxelNoun/followers", ... | value:False | true | |||||||||
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- `filesystems/compression.py`: "compresssed" -> "compressed"
- `fingerprint.py`: error message "Maximum lenth is" -> "Maximum length is"
- `dataset_dict.py` (x2): "contain None valies" -> "values"
- `iterable_dataset.py` (x2): "one thousand simulaten... | value:https://api.github.com/repos/huggingface/datasets/issues/8513/comments | value:PR_kwDODunzps8AAAABA18kwA | value:open | value:0 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8513", "html_url": "https://github.com/huggingface/datasets/pull/8513", "diff_url": "https://github.com/huggingface/datasets/pull/8513.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8513.patch", "merged_at": null} | value:2026-08-24T19:04:21Z | value:https://api.github.com/repos/huggingface/datasets/issues/8513/labels{/name} | value:8513 | json:{"login": "MsfPablo", "id": 129399053, "node_id": "U_kgDOB7Z5DQ", "avatar_url": "https://avatars.githubusercontent.com/u/129399053?v=4", "gravatar_id": "", "url": "https://api.github.com/users/MsfPablo", "html_url": "https://github.com/MsfPablo", "followers_url": "https://api.github.com/users/MsfPablo/followers", ... | value:False | true | |||||||||||
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Fixed README.md link to PDF processing docs that pointed to a non-existent page (docs/datasets/pdf_process); redirected to docs/datasets/document_dataset, which contains the actual PDF processing content.
## Why
A small, objectively-verifiable improvement (broken-link) found during a
daily open-source ma... | value:https://api.github.com/repos/huggingface/datasets/issues/8512/comments | value:PR_kwDODunzps8AAAABAzRvgg | value:closed | value:0 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8512", "html_url": "https://github.com/huggingface/datasets/pull/8512", "diff_url": "https://github.com/huggingface/datasets/pull/8512.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8512.patch", "merged_at": "2026-09-09T14:28:20Z"} | value:2026-10-09T19:53:09Z | value:https://api.github.com/repos/huggingface/datasets/issues/8512/labels{/name} | value:8512 | json:{"login": "aarushkandukoori", "id": 66923736, "node_id": "MDQ6VXNlcjY2OTIzNzM2", "avatar_url": "https://avatars.githubusercontent.com/u/66923736?v=4", "gravatar_id": "", "url": "https://api.github.com/users/aarushkandukoori", "html_url": "https://github.com/aarushkandukoori", "followers_url": "https://api.github.c... | value:False | true | |||||||||
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Casting a nested-list column whose Arrow value type is already `uint8` to `Image()` emits a spurious warning:
```
UserWarning: Downcasting array dtype int64 to uint8 to be compatible with 'Pillow'
```
No downcast is actually needed. The Arrow storage type is `list<item: list<item: list<ite... | value:https://api.github.com/repos/huggingface/datasets/issues/8511/comments | value:I_kwDODunzps8AAAABN-s6LA | value:open | value:0 | value:2026-08-24T09:23:22Z | value:https://api.github.com/repos/huggingface/datasets/issues/8511/labels{/name} | value:8511 | json:{"login": "albertvillanova", "id": 8515462, "node_id": "MDQ6VXNlcjg1MTU0NjI=", "avatar_url": "https://avatars.githubusercontent.com/u/8515462?v=4", "gravatar_id": "", "url": "https://api.github.com/users/albertvillanova", "html_url": "https://github.com/albertvillanova", "followers_url": "https://api.github.com/us... | true | |||||||||||
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This PR adds a `return_file_name` parameter to the JSON dataset loader. When enabled, the dataset will include a `file_name` column containing the source file name for each row.
## Changes
1. **Added `return_file_name` parameter to `JsonConfig`** - A new boolean parameter that defaults to `False` fo... | value:https://api.github.com/repos/huggingface/datasets/issues/8509/comments | value:PR_kwDODunzps8AAAABAwk97w | value:open | value:0 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8509", "html_url": "https://github.com/huggingface/datasets/pull/8509", "diff_url": "https://github.com/huggingface/datasets/pull/8509.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8509.patch", "merged_at": null} | value:2026-08-24T06:22:02Z | value:https://api.github.com/repos/huggingface/datasets/issues/8509/labels{/name} | value:8509 | json:{"login": "mukktinaadh", "id": 159904553, "node_id": "U_kgDOCYfzKQ", "avatar_url": "https://avatars.githubusercontent.com/u/159904553?v=4", "gravatar_id": "", "url": "https://api.github.com/users/mukktinaadh", "html_url": "https://github.com/mukktinaadh", "followers_url": "https://api.github.com/users/mukktinaadh/... | value:False | true | |||||||||||
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`ArrayXD` storage uses variable-length Arrow lists for compatibility, but reading the array reshapes values to the declared feature shape. This meant malformed nested input could be accepted and later returned with different row boundaries.
This PR:
- checks every fixed `ArrayXD` dimension a... | value:https://api.github.com/repos/huggingface/datasets/issues/8508/comments | value:PR_kwDODunzps8AAAABAuH1Tg | value:open | value:2 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8508", "html_url": "https://github.com/huggingface/datasets/pull/8508", "diff_url": "https://github.com/huggingface/datasets/pull/8508.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8508.patch", "merged_at": null} | value:2026-10-12T09:23:33Z | value:https://api.github.com/repos/huggingface/datasets/issues/8508/labels{/name} | value:8508 | json:{"login": "oroikono", "id": 91159033, "node_id": "MDQ6VXNlcjkxMTU5MDMz", "avatar_url": "https://avatars.githubusercontent.com/u/91159033?v=4", "gravatar_id": "", "url": "https://api.github.com/users/oroikono", "html_url": "https://github.com/oroikono", "followers_url": "https://api.github.com/users/oroikono/follow... | value:False | true | |||||||||||
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`Array2D` and the other `ArrayXD` features accept nested input whose dimensions do not match the declared shape when the total number of values happens to match.
For example, data shaped like `(2, 2)` can be created from rows of lengths `3` and `1`. When the value is read back, the rows are... | value:https://api.github.com/repos/huggingface/datasets/issues/8507/comments | value:I_kwDODunzps8AAAABN6Ra9w | value:open | value:1 | value:2026-08-23T18:43:58Z | value:https://api.github.com/repos/huggingface/datasets/issues/8507/labels{/name} | value:8507 | json:{"login": "oroikono", "id": 91159033, "node_id": "MDQ6VXNlcjkxMTU5MDMz", "avatar_url": "https://avatars.githubusercontent.com/u/91159033?v=4", "gravatar_id": "", "url": "https://api.github.com/users/oroikono", "html_url": "https://github.com/oroikono", "followers_url": "https://api.github.com/users/oroikono/follow... | true | |||||||||||
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Dear Hugging Face Team,
I am writing to request a correction regarding the language display name associated with the ISO 639-3 code `blk` on the platform.
Currently, it is displayed as **"Pa'O Karen"**. However, as a native speaker and local member of the Pa'O community, this terminology i... | value:https://api.github.com/repos/huggingface/datasets/issues/8505/comments | value:I_kwDODunzps8AAAABN4p-IQ | value:open | value:0 | value:2026-08-23T12:05:19Z | value:https://api.github.com/repos/huggingface/datasets/issues/8505/labels{/name} | value:8505 | json:{"login": "KhunPhanDuae", "id": 127810188, "node_id": "U_kgDOB546jA", "avatar_url": "https://avatars.githubusercontent.com/u/127810188?v=4", "gravatar_id": "", "url": "https://api.github.com/users/KhunPhanDuae", "html_url": "https://github.com/KhunPhanDuae", "followers_url": "https://api.github.com/users/KhunPhanD... | true | |||||||||||
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performance. Vortex files are self contained the integration logic
largely resembles parquet.
pyarrow minimum version has been raised in this pr to include fix for
Table.nbytes error with view types https://github.com/apache/arrow/issues/47279.
... | value:https://api.github.com/repos/huggingface/datasets/issues/8502/comments | value:PR_kwDODunzps8AAAABAkvL1g | value:closed | value:9 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8502", "html_url": "https://github.com/huggingface/datasets/pull/8502", "diff_url": "https://github.com/huggingface/datasets/pull/8502.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8502.patch", "merged_at": "2026-08-26T12:48:03Z"} | value:2026-08-27T17:02:22Z | value:https://api.github.com/repos/huggingface/datasets/issues/8502/labels{/name} | value:8502 | json:{"login": "robert3005", "id": 512084, "node_id": "MDQ6VXNlcjUxMjA4NA==", "avatar_url": "https://avatars.githubusercontent.com/u/512084?v=4", "gravatar_id": "", "url": "https://api.github.com/users/robert3005", "html_url": "https://github.com/robert3005", "followers_url": "https://api.github.com/users/robert3005/fo... | value:False | true | |||||||||
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`NumpyFormatter._tensorize` now early-returns `np.bool_`/`np.datetime64`/`np.timedelta64` scalars like other numpy scalars, `_recursive_tensorize` excludes all `np.generic` scalars from `__array__` conversion (previously it re-wrapped bool/datetime scalars into 0-d arrays), and the int64 default dtyp... | value:https://api.github.com/repos/huggingface/datasets/issues/8501/comments | value:PR_kwDODunzps8AAAABAWX4Qw | value:open | value:0 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8501", "html_url": "https://github.com/huggingface/datasets/pull/8501", "diff_url": "https://github.com/huggingface/datasets/pull/8501.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8501.patch", "merged_at": null} | value:2026-08-19T23:48:34Z | value:https://api.github.com/repos/huggingface/datasets/issues/8501/labels{/name} | value:8501 | json:{"login": "2sumtech", "id": 206164974, "node_id": "U_kgDODEnT7g", "avatar_url": "https://avatars.githubusercontent.com/u/206164974?v=4", "gravatar_id": "", "url": "https://api.github.com/users/2sumtech", "html_url": "https://github.com/2sumtech", "followers_url": "https://api.github.com/users/2sumtech/followers", ... | value:False | true | |||||||||||
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With numpy formatting, row access returns `np.int64`/`np.float64`/`np.str_` scalars for most dtypes, but **bool and timestamp/date values come back as 0-dimensional `ndarray`s** (`array(True)`), which are unhashable and fail `isinstance(x, np.bool_)` checks. Separately, **batch/column access... | value:https://api.github.com/repos/huggingface/datasets/issues/8500/comments | value:I_kwDODunzps8AAAABNdXI8A | value:open | value:0 | value:2026-08-19T23:48:11Z | value:https://api.github.com/repos/huggingface/datasets/issues/8500/labels{/name} | value:8500 | json:{"login": "2sumtech", "id": 206164974, "node_id": "U_kgDODEnT7g", "avatar_url": "https://avatars.githubusercontent.com/u/206164974?v=4", "gravatar_id": "", "url": "https://api.github.com/users/2sumtech", "html_url": "https://github.com/2sumtech", "followers_url": "https://api.github.com/users/2sumtech/followers", ... | true | |||||||||||
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## Summary
There appear to be two related issues with the `TsFile` format filter on the Hugging Face Datasets page:
1. The URL parameter for `TsFile` is inconsistent with other formats.
2. `TsFile` is not initially shown in the format filter and only appears after visiting a TsFile-specific URL.
## 1. Incons... | value:https://api.github.com/repos/huggingface/datasets/issues/8499/comments | value:I_kwDODunzps8AAAABNXpH_A | value:open | value:3 | value:2026-10-27T15:59:37Z | value:https://api.github.com/repos/huggingface/datasets/issues/8499/labels{/name} | value:8499 | json:{"login": "ColinLeeo", "id": 105656576, "node_id": "U_kgDOBkwxAA", "avatar_url": "https://avatars.githubusercontent.com/u/105656576?v=4", "gravatar_id": "", "url": "https://api.github.com/users/ColinLeeo", "html_url": "https://github.com/ColinLeeo", "followers_url": "https://api.github.com/users/ColinLeeo/follower... | true | |||||||||||
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Fixes #8483
Currently \Dataset.take(n)\ executes \self.select(range(n))\. When \
\ exceeds the dataset size \len(self)\, \
ange(n)\ attempts to index beyond the end of the table and raises an \IndexError\. Meanwhile, \IterableDataset.take(n)\ gracefully yields up to \
\ items.
## Changes
- In \src/... | value:https://api.github.com/repos/huggingface/datasets/issues/8497/comments | value:PR_kwDODunzps8AAAABAPp-7w | value:open | value:0 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8497", "html_url": "https://github.com/huggingface/datasets/pull/8497", "diff_url": "https://github.com/huggingface/datasets/pull/8497.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8497.patch", "merged_at": null} | value:2026-08-19T06:58:54Z | value:https://api.github.com/repos/huggingface/datasets/issues/8497/labels{/name} | value:8497 | json:{"login": "webdevsamran", "id": 121370806, "node_id": "U_kgDOBzv4tg", "avatar_url": "https://avatars.githubusercontent.com/u/121370806?v=4", "gravatar_id": "", "url": "https://api.github.com/users/webdevsamran", "html_url": "https://github.com/webdevsamran", "followers_url": "https://api.github.com/users/webdevsam... | value:False | true | |||||||||||
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- return the accumulated storage options for every hop in chained fsspec URLs
- add a regression test covering protocol-specific options on both `zip` and `https` hops
## Problem
`_prepare_path_and_storage_options` builds `prepared_storage_options` while iterating over a multi-hop path, but returned... | value:https://api.github.com/repos/huggingface/datasets/issues/8496/comments | value:PR_kwDODunzps8AAAABAJ1kuQ | value:closed | value:2 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8496", "html_url": "https://github.com/huggingface/datasets/pull/8496", "diff_url": "https://github.com/huggingface/datasets/pull/8496.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8496.patch", "merged_at": "2026-09-10T13:32:53Z"} | value:2026-09-10T13:32:53Z | value:https://api.github.com/repos/huggingface/datasets/issues/8496/labels{/name} | value:8496 | json:{"login": "tandede", "id": 127607634, "node_id": "U_kgDOB5sjUg", "avatar_url": "https://avatars.githubusercontent.com/u/127607634?v=4", "gravatar_id": "", "url": "https://api.github.com/users/tandede", "html_url": "https://github.com/tandede", "followers_url": "https://api.github.com/users/tandede/followers", "fol... | value:False | true | |||||||||
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`Dataset.cast_column` / `Dataset.cast` to a `ClassLabel` column silently keeps label indices that are out of range for the target number of classes. The corruption only shows up later — e.g. on the first `int2str` call — or silently trains on wrong labels:
```python
from datasets import Dat... | value:https://api.github.com/repos/huggingface/datasets/issues/8494/comments | value:I_kwDODunzps8AAAABNLraXQ | value:open | value:0 | value:2026-08-18T08:11:05Z | value:https://api.github.com/repos/huggingface/datasets/issues/8494/labels{/name} | value:8494 | json:{"login": "shoutoutuoadi325", "id": 218713058, "node_id": "U_kgDODQlL4g", "avatar_url": "https://avatars.githubusercontent.com/u/218713058?v=4", "gravatar_id": "", "url": "https://api.github.com/users/shoutoutuoadi325", "html_url": "https://github.com/shoutoutuoadi325", "followers_url": "https://api.github.com/use... | true | |||||||||||
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Fixes #8491.
When `writer.finalize()` raises in `_map_single()`, the `except` block calls `finalize()` again on a writer whose stream is already closed. `finalize()` then hits `self.pa_writer is None and self.schema` and calls `_build_writer(self.schema)`, which raises `ValueError: I/O operation on c... | value:https://api.github.com/repos/huggingface/datasets/issues/8493/comments | value:PR_kwDODunzps8AAAABAEV0fA | value:open | value:3 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8493", "html_url": "https://github.com/huggingface/datasets/pull/8493", "diff_url": "https://github.com/huggingface/datasets/pull/8493.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8493.patch", "merged_at": null} | value:2026-10-07T18:28:51Z | value:https://api.github.com/repos/huggingface/datasets/issues/8493/labels{/name} | value:8493 | json:{"login": "jayzuccarelli", "id": 11176606, "node_id": "MDQ6VXNlcjExMTc2NjA2", "avatar_url": "https://avatars.githubusercontent.com/u/11176606?v=4", "gravatar_id": "", "url": "https://api.github.com/users/jayzuccarelli", "html_url": "https://github.com/jayzuccarelli", "followers_url": "https://api.github.com/users/... | value:False | true | |||||||||||
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### Problem
`Dataset.take(n)` is `select(range(n))`, so asking for more elements than the dataset has raises from the out-of-range index — while the `IterableDataset` counterpart returns the elements it has:
```python
>>> ds = Dataset.from_dict({"a": [1, 2, 3]})
>>> ds.take(3)
Dataset({features: ['... | value:https://api.github.com/repos/huggingface/datasets/issues/8492/comments | value:PR_kwDODunzps7_7cuf | value:open | value:0 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8492", "html_url": "https://github.com/huggingface/datasets/pull/8492", "diff_url": "https://github.com/huggingface/datasets/pull/8492.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8492.patch", "merged_at": null} | value:2026-08-17T06:20:57Z | value:https://api.github.com/repos/huggingface/datasets/issues/8492/labels{/name} | value:8492 | json:{"login": "shashvat-singham", "id": 78735607, "node_id": "MDQ6VXNlcjc4NzM1NjA3", "avatar_url": "https://avatars.githubusercontent.com/u/78735607?v=4", "gravatar_id": "", "url": "https://api.github.com/users/shashvat-singham", "html_url": "https://github.com/shashvat-singham", "followers_url": "https://api.github.c... | value:False | true | |||||||||||
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We hit this while running Megatron-LM training through ms-swift, which uses `datasets` under the hood for preprocessing. Our preprocessing step calls `Dataset.map()` with a fairly aggressive `num_proc=512` on a ~25k-example JSONL file:
```bash
swift --dataset_num_proc 512 --dataset large.js... | value:https://api.github.com/repos/huggingface/datasets/issues/8491/comments | value:I_kwDODunzps8AAAABNBXb3g | value:open | value:5 | value:2026-09-29T22:49:46Z | value:https://api.github.com/repos/huggingface/datasets/issues/8491/labels{/name} | value:8491 | json:{"login": "HowardZorn", "id": 18005538, "node_id": "MDQ6VXNlcjE4MDA1NTM4", "avatar_url": "https://avatars.githubusercontent.com/u/18005538?v=4", "gravatar_id": "", "url": "https://api.github.com/users/HowardZorn", "html_url": "https://github.com/HowardZorn", "followers_url": "https://api.github.com/users/HowardZor... | true | |||||||||||
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The `safemembers` path check that guards archive extraction (the CVE-2007-4559 mitigation, duplicated across the tar/zip/rar/7z extractors) uses a plain `startswith(base)`. That also matches **sibling directories whose name starts with the output directory's name**:
```py
target = resolved(os.path.join(b... | value:https://api.github.com/repos/huggingface/datasets/issues/8490/comments | value:PR_kwDODunzps7_yA7P | value:closed | value:1 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8490", "html_url": "https://github.com/huggingface/datasets/pull/8490", "diff_url": "https://github.com/huggingface/datasets/pull/8490.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8490.patch", "merged_at": "2026-08-31T09:38:34Z"} | value:2026-08-31T09:38:34Z | value:https://api.github.com/repos/huggingface/datasets/issues/8490/labels{/name} | value:8490 | json:{"login": "icn5381", "id": 255778606, "node_id": "U_kgDODz7fLg", "avatar_url": "https://avatars.githubusercontent.com/u/255778606?v=4", "gravatar_id": "", "url": "https://api.github.com/users/icn5381", "html_url": "https://github.com/icn5381", "followers_url": "https://api.github.com/users/icn5381/followers", "fol... | value:False | true | |||||||||
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Adds `TestLoadFromHub.test_load_dataset_after_repo_rename` to `tests/test_upstream_hub.py`:
1. pushes a small dataset to a temporary repo on hub-ci
2. renames the repo with `HfApi.move_repo` (the `/api/repos/move` endpoint suggested in the issue), with a sanity assertion that the repo now lives und... | value:https://api.github.com/repos/huggingface/datasets/issues/8489/comments | value:PR_kwDODunzps7_riae | value:open | value:0 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8489", "html_url": "https://github.com/huggingface/datasets/pull/8489", "diff_url": "https://github.com/huggingface/datasets/pull/8489.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8489.patch", "merged_at": null} | value:2026-08-16T09:53:40Z | value:https://api.github.com/repos/huggingface/datasets/issues/8489/labels{/name} | value:8489 | json:{"login": "chintan-diwakar", "id": 48587709, "node_id": "MDQ6VXNlcjQ4NTg3NzA5", "avatar_url": "https://avatars.githubusercontent.com/u/48587709?v=4", "gravatar_id": "", "url": "https://api.github.com/users/chintan-diwakar", "html_url": "https://github.com/chintan-diwakar", "followers_url": "https://api.github.com/... | value:False | true | |||||||||||
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The Spark test module no longer imports PySpark during collection. Its configuration tests remain active without the optional dependency, while the eight tests that actually create Spark sessions use the existing `require_pyspark` decorator and local imports already used elsewhere in the test suite.... | value:https://api.github.com/repos/huggingface/datasets/issues/8488/comments | value:PR_kwDODunzps7_mowk | value:open | value:1 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8488", "html_url": "https://github.com/huggingface/datasets/pull/8488", "diff_url": "https://github.com/huggingface/datasets/pull/8488.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8488.patch", "merged_at": null} | value:2026-08-28T13:48:51Z | value:https://api.github.com/repos/huggingface/datasets/issues/8488/labels{/name} | value:8488 | json:{"login": "fallenmi", "id": 33496176, "node_id": "MDQ6VXNlcjMzNDk2MTc2", "avatar_url": "https://avatars.githubusercontent.com/u/33496176?v=4", "gravatar_id": "", "url": "https://api.github.com/users/fallenmi", "html_url": "https://github.com/fallenmi", "followers_url": "https://api.github.com/users/fallenmi/follow... | value:False | true | |||||||||||
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`test_move_script_doesnt_change_hash` now invokes both temporary scripts with `sys.executable` instead of relying on a `python` command being available on `PATH`. This keeps the subprocess interpreter aligned with the interpreter running pytest and fixes environments such as FreeBSD where only `pyth... | value:https://api.github.com/repos/huggingface/datasets/issues/8487/comments | value:PR_kwDODunzps7_mc-m | value:open | value:0 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8487", "html_url": "https://github.com/huggingface/datasets/pull/8487", "diff_url": "https://github.com/huggingface/datasets/pull/8487.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8487.patch", "merged_at": null} | value:2026-08-25T12:56:49Z | value:https://api.github.com/repos/huggingface/datasets/issues/8487/labels{/name} | value:8487 | json:{"login": "fallenmi", "id": 33496176, "node_id": "MDQ6VXNlcjMzNDk2MTc2", "avatar_url": "https://avatars.githubusercontent.com/u/33496176?v=4", "gravatar_id": "", "url": "https://api.github.com/users/fallenmi", "html_url": "https://github.com/fallenmi", "followers_url": "https://api.github.com/users/fallenmi/follow... | value:False | true | |||||||||||
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## Problem
`PandasArrayExtensionArray.take` coerces `fill_value` to the pandas dtype *before* checking whether any row is actually missing. When `allow_fill=True` with a mask that contains no missing indices, `take` still needs to return a proper pandas Series — but the coercion can blow up for valu... | value:https://api.github.com/repos/huggingface/datasets/issues/8486/comments | value:PR_kwDODunzps7_loWI | value:open | value:0 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8486", "html_url": "https://github.com/huggingface/datasets/pull/8486", "diff_url": "https://github.com/huggingface/datasets/pull/8486.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8486.patch", "merged_at": null} | value:2026-08-15T23:08:41Z | value:https://api.github.com/repos/huggingface/datasets/issues/8486/labels{/name} | value:8486 | json:{"login": "aryansk", "id": 70511529, "node_id": "MDQ6VXNlcjcwNTExNTI5", "avatar_url": "https://avatars.githubusercontent.com/u/70511529?v=4", "gravatar_id": "", "url": "https://api.github.com/users/aryansk", "html_url": "https://github.com/aryansk", "followers_url": "https://api.github.com/users/aryansk/followers"... | value:True | true | |||||||||||
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## Problem
`Dataset.take(n)` raises `IndexError: index ... is out of bounds for axis 0 with size ...` when `n` exceeds the number of rows, while `IterableDataset.take(n)` returns everything available (list-slice semantics). The two dataset flavors should behave consistently.
## Change
Clamp the re... | value:https://api.github.com/repos/huggingface/datasets/issues/8485/comments | value:PR_kwDODunzps7_loOj | value:open | value:2 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8485", "html_url": "https://github.com/huggingface/datasets/pull/8485", "diff_url": "https://github.com/huggingface/datasets/pull/8485.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8485.patch", "merged_at": null} | value:2026-08-28T13:46:43Z | value:https://api.github.com/repos/huggingface/datasets/issues/8485/labels{/name} | value:8485 | json:{"login": "aryansk", "id": 70511529, "node_id": "MDQ6VXNlcjcwNTExNTI5", "avatar_url": "https://avatars.githubusercontent.com/u/70511529?v=4", "gravatar_id": "", "url": "https://api.github.com/users/aryansk", "html_url": "https://github.com/aryansk", "followers_url": "https://api.github.com/users/aryansk/followers"... | value:True | true | |||||||||||
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### Problem
`int2str` validates the container it is given, but never the elements inside it. Three consequences, in decreasing order of severity:
```python
>>> cl = ClassLabel(names=["neg", "pos"])
>>> cl.int2str([1.7])
['pos'] # silently truncated by the int(v) used t... | value:https://api.github.com/repos/huggingface/datasets/issues/8484/comments | value:PR_kwDODunzps7_lkDi | value:open | value:0 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8484", "html_url": "https://github.com/huggingface/datasets/pull/8484", "diff_url": "https://github.com/huggingface/datasets/pull/8484.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8484.patch", "merged_at": null} | value:2026-08-15T23:01:22Z | value:https://api.github.com/repos/huggingface/datasets/issues/8484/labels{/name} | value:8484 | json:{"login": "shashvat-singham", "id": 78735607, "node_id": "MDQ6VXNlcjc4NzM1NjA3", "avatar_url": "https://avatars.githubusercontent.com/u/78735607?v=4", "gravatar_id": "", "url": "https://api.github.com/users/shashvat-singham", "html_url": "https://github.com/shashvat-singham", "followers_url": "https://api.github.c... | value:False | true | |||||||||||
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`Dataset.take(n)` raises when asked for more elements than the dataset has, while `IterableDataset.take(n)` returns the elements it has. Both are documented identically as "Create a new [...] with only the first `n` elements".
```python
>>> from datasets import Dataset
>>> ds = Dataset.from... | value:https://api.github.com/repos/huggingface/datasets/issues/8483/comments | value:I_kwDODunzps8AAAABM5PaRw | value:open | value:3 | value:2026-09-08T10:02:39Z | value:https://api.github.com/repos/huggingface/datasets/issues/8483/labels{/name} | value:8483 | json:{"login": "shashvat-singham", "id": 78735607, "node_id": "MDQ6VXNlcjc4NzM1NjA3", "avatar_url": "https://avatars.githubusercontent.com/u/78735607?v=4", "gravatar_id": "", "url": "https://api.github.com/users/shashvat-singham", "html_url": "https://github.com/shashvat-singham", "followers_url": "https://api.github.c... | true | |||||||||||
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```python
>>> ds = Dataset.from_dict({"a": [1, 2, 3]})
>>> ds.skip(2)
Dataset({features: ['a'], num_rows: 1})
>>> ds.skip(3)
IndexError: Index 3 out of range for dataset of size 3.
>>> d... | value:https://api.github.com/repos/huggingface/datasets/issues/8482/comments | value:PR_kwDODunzps7_hL3C | value:open | value:0 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8482", "html_url": "https://github.com/huggingface/datasets/pull/8482", "diff_url": "https://github.com/huggingface/datasets/pull/8482.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8482.patch", "merged_at": null} | value:2026-08-18T13:03:04Z | value:https://api.github.com/repos/huggingface/datasets/issues/8482/labels{/name} | value:8482 | json:{"login": "shashvat-singham", "id": 78735607, "node_id": "MDQ6VXNlcjc4NzM1NjA3", "avatar_url": "https://avatars.githubusercontent.com/u/78735607?v=4", "gravatar_id": "", "url": "https://api.github.com/users/shashvat-singham", "html_url": "https://github.com/shashvat-singham", "followers_url": "https://api.github.c... | value:False | true | |||||||||||
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`ClassLabel.str2int` and `ClassLabel.int2str` both validate the *container* they're given, but never the elements inside it. Two of the resulting cases fail silently and return wrong labels rather than raising.
`str2int` accepts ints and hands them straight back, so a column of integer labe... | value:https://api.github.com/repos/huggingface/datasets/issues/8481/comments | value:I_kwDODunzps8AAAABM3kS-A | value:open | value:2 | value:2026-08-17T06:13:32Z | value:https://api.github.com/repos/huggingface/datasets/issues/8481/labels{/name} | value:8481 | json:{"login": "shashvat-singham", "id": 78735607, "node_id": "MDQ6VXNlcjc4NzM1NjA3", "avatar_url": "https://avatars.githubusercontent.com/u/78735607?v=4", "gravatar_id": "", "url": "https://api.github.com/users/shashvat-singham", "html_url": "https://github.com/shashvat-singham", "followers_url": "https://api.github.c... | true | |||||||||||
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I encountered an error when batching a dataset by a nullable column. Rows containing null values were not split into the expected groups, and grouping by an all-null Arrow column raised an `ArrowNotImplementedError`.
For example, batching this column:
```python
[None, None, "A", "A", None,... | value:https://api.github.com/repos/huggingface/datasets/issues/8478/comments | value:PR_kwDODunzps7-51NF | value:closed | value:0 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8478", "html_url": "https://github.com/huggingface/datasets/pull/8478", "diff_url": "https://github.com/huggingface/datasets/pull/8478.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8478.patch", "merged_at": null} | value:2026-10-03T02:51:55Z | value:https://api.github.com/repos/huggingface/datasets/issues/8478/labels{/name} | value:8478 | json:{"login": "Michael-RDev", "id": 89427972, "node_id": "MDQ6VXNlcjg5NDI3OTcy", "avatar_url": "https://avatars.githubusercontent.com/u/89427972?v=4", "gravatar_id": "", "url": "https://api.github.com/users/Michael-RDev", "html_url": "https://github.com/Michael-RDev", "followers_url": "https://api.github.com/users/Mic... | value:False | true | |||||||||
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- reject non-positive `batch_size` values in `Dataset.batch()` and `IterableDataset.batch()`
- raise before mapping or consuming an iterable source
- add focused regression tests for `0` and `-1`
Fixes #8472
## Related work
This includes the small `_check_batch_size` helper also proposed by @LeSing... | value:https://api.github.com/repos/huggingface/datasets/issues/8477/comments | value:PR_kwDODunzps7-stG2 | value:open | value:1 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8477", "html_url": "https://github.com/huggingface/datasets/pull/8477", "diff_url": "https://github.com/huggingface/datasets/pull/8477.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8477.patch", "merged_at": null} | value:2026-09-13T07:20:22Z | value:https://api.github.com/repos/huggingface/datasets/issues/8477/labels{/name} | value:8477 | json:{"login": "Anakintano", "id": 126348043, "node_id": "U_kgDOB4frCw", "avatar_url": "https://avatars.githubusercontent.com/u/126348043?v=4", "gravatar_id": "", "url": "https://api.github.com/users/Anakintano", "html_url": "https://github.com/Anakintano", "followers_url": "https://api.github.com/users/Anakintano/foll... | value:False | true | |||||||||||
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### What this fixes
`Dataset.select` validates indices with `_check_valid_indices_value`, which implements Python-style negative indexing (it only rejects a negative index when `index + size < 0`), but `_select_with_indices_mapping` then converts the indices with `pa.array(indices, type=pa.uint64()... | value:https://api.github.com/repos/huggingface/datasets/issues/8476/comments | value:PR_kwDODunzps7-YDwB | value:open | value:0 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8476", "html_url": "https://github.com/huggingface/datasets/pull/8476", "diff_url": "https://github.com/huggingface/datasets/pull/8476.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8476.patch", "merged_at": null} | value:2026-08-13T03:07:14Z | value:https://api.github.com/repos/huggingface/datasets/issues/8476/labels{/name} | value:8476 | json:{"login": "codeAnqiang-ma", "id": 273298913, "node_id": "U_kgDOEEo14Q", "avatar_url": "https://avatars.githubusercontent.com/u/273298913?v=4", "gravatar_id": "", "url": "https://api.github.com/users/codeAnqiang-ma", "html_url": "https://github.com/codeAnqiang-ma", "followers_url": "https://api.github.com/users/cod... | value:False | true |
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