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## Summary
Add a packaged builder for [TsFile](https://tsfile.apache.org/) — the columnar time-series file format used as the native storage layer of [Apache IoTDB](https://iotdb.apache.org/). This enables `load_dataset("tsfile", data_files="...")` with automatic `.tsfile` extension detection.
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Version: 4.8.5
### Steps to reproduce the bug
n/a
### Expected behavior
n/a
### Environment info
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When `load_dataset()` falls back to the local cache, for example when offline or when the Hub is unreachable, it ignores the `revision` argument and simply returns the most recently modified cached version. This can lead to unexpected behavior when a specific revision is requested.
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- expand `~` before classifying local `data_files` patterns
- add a regression test covering `resolve_pattern(os.path.join("~", ...), ...)`
Impact
- `load_dataset(..., data_files="~/path/to/file.parquet")` currently treats `~` as a literal relative directory under the working tree instead of the user's h... | value:https://api.github.com/repos/huggingface/datasets/issues/8153/comments | value:PR_kwDODunzps7VYf09 | value:open | value:1 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8153", "html_url": "https://github.com/huggingface/datasets/pull/8153", "diff_url": "https://github.com/huggingface/datasets/pull/8153.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8153.patch", "merged_at": null} | value:2026-04-24T17:24:54Z | value:https://api.github.com/repos/huggingface/datasets/issues/8153/labels{/name} | value:8153 | json:{"login": "BerqiaMouad", "id": 83679093, "node_id": "MDQ6VXNlcjgzNjc5MDkz", "avatar_url": "https://avatars.githubusercontent.com/u/83679093?v=4", "gravatar_id": "", "url": "https://api.github.com/users/BerqiaMouad", "html_url": "https://github.com/BerqiaMouad", "followers_url": "https://api.github.com/users/Berqia... | value:False | true | |||||||||||
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kinda related: https://github.com/huggingface/datasets/issues/5717 | value:https://api.github.com/repos/huggingface/datasets/issues/8150/comments | value:PR_kwDODunzps7VDX2w | value:closed | value:0 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8150", "html_url": "https://github.com/huggingface/datasets/pull/8150", "diff_url": "https://github.com/huggingface/datasets/pull/8150.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8150.patch", "merged_at": "2026-04-23T16:48:34Z"} | value:2026-04-23T16:48:36Z | value:https://api.github.com/repos/huggingface/datasets/issues/8150/labels{/name} | value:8150 | json:{"login": "lhoestq", "id": 42851186, "node_id": "MDQ6VXNlcjQyODUxMTg2", "avatar_url": "https://avatars.githubusercontent.com/u/42851186?v=4", "gravatar_id": "", "url": "https://api.github.com/users/lhoestq", "html_url": "https://github.com/lhoestq", "followers_url": "https://api.github.com/users/lhoestq/followers"... | value:False | true | |||||||||
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Modify the dataset loading initialization, so that fsspec filesystem instances (like GCSFileSystem or S3FileSystem) are instantiated once in the main thread and explicitly passed down to the background threads.
By pre-instantiating the fs object in the main thread (where the directory cache ... | value:https://api.github.com/repos/huggingface/datasets/issues/8149/comments | value:I_kwDODunzps8AAAABAUM1HQ | value:open | value:3 | value:2026-08-29T21:42:58Z | value:https://api.github.com/repos/huggingface/datasets/issues/8149/labels{/name} | value:8149 | json:{"login": "ankitaluthra1", "id": 16970953, "node_id": "MDQ6VXNlcjE2OTcwOTUz", "avatar_url": "https://avatars.githubusercontent.com/u/16970953?v=4", "gravatar_id": "", "url": "https://api.github.com/users/ankitaluthra1", "html_url": "https://github.com/ankitaluthra1", "followers_url": "https://api.github.com/users/... | true | |||||||||||
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## Motivation
Apache Iceberg is the most widely adopted open table format for data lakes, supported by Databricks,
Snowflake, AWS Glue, Dremio, and others. A large amount of ML training data lives in Iceberg tables.
Currently, users must manually export Iceberg ... | value:https://api.github.com/repos/huggingface/datasets/issues/8148/comments | value:PR_kwDODunzps7U9MrN | value:closed | value:1 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8148", "html_url": "https://github.com/huggingface/datasets/pull/8148", "diff_url": "https://github.com/huggingface/datasets/pull/8148.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8148.patch", "merged_at": "2026-05-27T14:41:30Z"} | value:2026-05-27T14:41:30Z | value:https://api.github.com/repos/huggingface/datasets/issues/8148/labels{/name} | value:8148 | json:{"login": "frankliee", "id": 10219731, "node_id": "MDQ6VXNlcjEwMjE5NzMx", "avatar_url": "https://avatars.githubusercontent.com/u/10219731?v=4", "gravatar_id": "", "url": "https://api.github.com/users/frankliee", "html_url": "https://github.com/frankliee", "followers_url": "https://api.github.com/users/frankliee/fo... | value:False | true | |||||||||
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Fixes: https://github.com/huggingface/datasets/issues/8145
## Root Cause
`FormattedExamplesIterable.__iter__` ignored `force_convert_to_python` and used Arrow batch iteration, advancing the
underlying state by a full Arrow chunk before yielding Python examples.
## Fix
Only use Arrow batch iterati... | value:https://api.github.com/repos/huggingface/datasets/issues/8147/comments | value:PR_kwDODunzps7UzF0Q | value:closed | value:3 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8147", "html_url": "https://github.com/huggingface/datasets/pull/8147", "diff_url": "https://github.com/huggingface/datasets/pull/8147.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8147.patch", "merged_at": "2026-04-27T14:03:26Z"} | value:2026-04-27T14:03:27Z | value:https://api.github.com/repos/huggingface/datasets/issues/8147/labels{/name} | value:8147 | json:{"login": "Brianzhengca", "id": 30914529, "node_id": "MDQ6VXNlcjMwOTE0NTI5", "avatar_url": "https://avatars.githubusercontent.com/u/30914529?v=4", "gravatar_id": "", "url": "https://api.github.com/users/Brianzhengca", "html_url": "https://github.com/Brianzhengca", "followers_url": "https://api.github.com/users/Bri... | value:False | true | |||||||||
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Fixes #8125.
`Dataset.map()` (and the indices writer in `Dataset.flatten_indices` / `Dataset.select` path) calls `os.chmod(cache_file, 0o666 & ~umask)` on the freshly moved cache file. On flat-permission filesystems — GCS FUSE, S3 FUSE mounts, and similar object-storage-backed mounts — `chmod` raises... | value:https://api.github.com/repos/huggingface/datasets/issues/8146/comments | value:PR_kwDODunzps7UpCh7 | value:open | value:0 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8146", "html_url": "https://github.com/huggingface/datasets/pull/8146", "diff_url": "https://github.com/huggingface/datasets/pull/8146.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8146.patch", "merged_at": null} | value:2026-04-22T13:39:46Z | value:https://api.github.com/repos/huggingface/datasets/issues/8146/labels{/name} | value:8146 | json:{"login": "dschulmeist", "id": 62301265, "node_id": "MDQ6VXNlcjYyMzAxMjY1", "avatar_url": "https://avatars.githubusercontent.com/u/62301265?v=4", "gravatar_id": "", "url": "https://api.github.com/users/dschulmeist", "html_url": "https://github.com/dschulmeist", "followers_url": "https://api.github.com/users/dschul... | value:False | true | |||||||||||
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After `ds.map(fn)` on a streaming IterableDataset, saving state_dict() and loading it into a fresh dataset does not resume at the correct position. It jumps forward by up to one Arrow read-chunk (~1000 rows).
### Steps to reproduce the bug
```python
from datasets import Dataset
ds1 = Data... | value:https://api.github.com/repos/huggingface/datasets/issues/8145/comments | value:I_kwDODunzps8AAAABAK-nPw | value:closed | value:1 | value:2026-04-27T14:03:28Z | value:https://api.github.com/repos/huggingface/datasets/issues/8145/labels{/name} | value:8145 | json:{"login": "MonliH", "id": 30177086, "node_id": "MDQ6VXNlcjMwMTc3MDg2", "avatar_url": "https://avatars.githubusercontent.com/u/30177086?v=4", "gravatar_id": "", "url": "https://api.github.com/users/MonliH", "html_url": "https://github.com/MonliH", "followers_url": "https://api.github.com/users/MonliH/followers", "f... | true | ||||||||
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Adds first-class support for the [Apache TsFile](https://tsfile.apache.org/)
columnar time-series format (used by [Apache IoTDB](https://iotdb.apache.org/)
and other time-series systems) to 🤗 Datasets, and surfaces time-series
datasets as a dedicated modality in the documentation s... | value:https://api.github.com/repos/huggingface/datasets/issues/8144/comments | value:PR_kwDODunzps7UNskE | value:closed | value:0 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8144", "html_url": "https://github.com/huggingface/datasets/pull/8144", "diff_url": "https://github.com/huggingface/datasets/pull/8144.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8144.patch", "merged_at": null} | value:2026-04-21T07:16:23Z | value:https://api.github.com/repos/huggingface/datasets/issues/8144/labels{/name} | value:8144 | json:{"login": "Young-Leo", "id": 122667095, "node_id": "U_kgDOB0_AVw", "avatar_url": "https://avatars.githubusercontent.com/u/122667095?v=4", "gravatar_id": "", "url": "https://api.github.com/users/Young-Leo", "html_url": "https://github.com/Young-Leo", "followers_url": "https://api.github.com/users/Young-Leo/follower... | value:False | true | |||||||||
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Replaced `list` with `Sequence` in public API function signatures across:
- `arrow_dataset.py` — from_csv, from_json, from_parquet, from_text
- `iterable_dataset.py` — from_csv, from_json, from_parquet, from_text
- `combine.py` — interleave_datasets, concatenate_datasets
- `dataset_dict.py` —... | value:https://api.github.com/repos/huggingface/datasets/issues/8142/comments | value:PR_kwDODunzps7Txzfw | value:closed | value:0 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8142", "html_url": "https://github.com/huggingface/datasets/pull/8142", "diff_url": "https://github.com/huggingface/datasets/pull/8142.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8142.patch", "merged_at": null} | value:2026-05-13T19:04:10Z | value:https://api.github.com/repos/huggingface/datasets/issues/8142/labels{/name} | value:8142 | json:{"login": "Swaroop883", "id": 186127406, "node_id": "U_kgDOCxgULg", "avatar_url": "https://avatars.githubusercontent.com/u/186127406?v=4", "gravatar_id": "", "url": "https://api.github.com/users/Swaroop883", "html_url": "https://github.com/Swaroop883", "followers_url": "https://api.github.com/users/Swaroop883/foll... | value:False | true | |||||||||
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Introduce _get_target_pa_type() to detect large types from incoming storage and _to_struct_storage() to build struc... | value:https://api.github.com/repos/huggingface/datasets/issues/8141/comments | value:PR_kwDODunzps7TOjAR | value:open | value:9 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8141", "html_url": "https://github.com/huggingface/datasets/pull/8141", "diff_url": "https://github.com/huggingface/datasets/pull/8141.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8141.patch", "merged_at": null} | value:2026-10-16T20:12:54Z | value:https://api.github.com/repos/huggingface/datasets/issues/8141/labels{/name} | value:8141 | json:{"login": "kasperg3", "id": 34032375, "node_id": "MDQ6VXNlcjM0MDMyMzc1", "avatar_url": "https://avatars.githubusercontent.com/u/34032375?v=4", "gravatar_id": "", "url": "https://api.github.com/users/kasperg3", "html_url": "https://github.com/kasperg3", "followers_url": "https://api.github.com/users/kasperg3/follow... | value:True | true | |||||||||||
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```
../../.pyenv/versions/3.12.2/envs/hf-datasets/lib/python3.12/site-packages/transformers/__init__.py:843: in _getattr
return getattr(importlib.import_module(target, __name__), new_name)
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There is a change in the approach to decoding JSON types, added in https://github.com/huggingface/datasets/commit/d560b58e1f1ec96591a95a1780ee118f5eea6c74. Since 4.7.0, to_list() returns raw JSON strings for columns stored as Json(), while direct access via getitem returns dicts.
In versions p... | value:https://api.github.com/repos/huggingface/datasets/issues/8137/comments | value:PR_kwDODunzps7S9ENL | value:closed | value:3 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8137", "html_url": "https://github.com/huggingface/datasets/pull/8137", "diff_url": "https://github.com/huggingface/datasets/pull/8137.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8137.patch", "merged_at": "2026-04-27T15:32:29Z"} | value:2026-04-27T15:49:42Z | value:https://api.github.com/repos/huggingface/datasets/issues/8137/labels{/name} | value:8137 | json:{"login": "ItsTania", "id": 120768997, "node_id": "U_kgDOBzLJ5Q", "avatar_url": "https://avatars.githubusercontent.com/u/120768997?v=4", "gravatar_id": "", "url": "https://api.github.com/users/ItsTania", "html_url": "https://github.com/ItsTania", "followers_url": "https://api.github.com/users/ItsTania/followers", ... | value:False | true | |||||||||
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This PR adds support for **plain Zarr** to `datasets`, split into three complementary pieces:
1. a new `Zarr` **feature** that stores only a path in Arrow and lazily opens the store on access (arrays only, by design — see "Design contract" below);
2. a **`zarrfolder`** packaged module that builds an in... | value:https://api.github.com/repos/huggingface/datasets/issues/8135/comments | value:PR_kwDODunzps7Sm752 | value:open | value:8 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8135", "html_url": "https://github.com/huggingface/datasets/pull/8135", "diff_url": "https://github.com/huggingface/datasets/pull/8135.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8135.patch", "merged_at": null} | value:2026-08-21T06:12:20Z | value:https://api.github.com/repos/huggingface/datasets/issues/8135/labels{/name} | value:8135 | json:{"login": "Elsword016", "id": 29883365, "node_id": "MDQ6VXNlcjI5ODgzMzY1", "avatar_url": "https://avatars.githubusercontent.com/u/29883365?v=4", "gravatar_id": "", "url": "https://api.github.com/users/Elsword016", "html_url": "https://github.com/Elsword016", "followers_url": "https://api.github.com/users/Elsword01... | value:False | true | |||||||||||
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- Store the full repo-relative path in `file_name` instead of just the basename
- Extracts the path from the `hf://` origin URL set by the download manager
Before: `file_name = "614b8d50-097f-4e36-aee0-1fdd05333... | value:https://api.github.com/repos/huggingface/datasets/issues/8133/comments | value:PR_kwDODunzps7Sczz9 | value:closed | value:2 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8133", "html_url": "https://github.com/huggingface/datasets/pull/8133", "diff_url": "https://github.com/huggingface/datasets/pull/8133.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8133.patch", "merged_at": "2026-04-15T11:18:54Z"} | value:2026-04-15T11:18:56Z | value:https://api.github.com/repos/huggingface/datasets/issues/8133/labels{/name} | value:8133 | json:{"login": "cfahlgren1", "id": 13546028, "node_id": "MDQ6VXNlcjEzNTQ2MDI4", "avatar_url": "https://avatars.githubusercontent.com/u/13546028?v=4", "gravatar_id": "", "url": "https://api.github.com/users/cfahlgren1", "html_url": "https://github.com/cfahlgren1", "followers_url": "https://api.github.com/users/cfahlgren... | value:False | true | |||||||||
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Fixes #7990
## The Bug
When a map function returns `None` for the first examples and a dict for
later ones, `Dataset.map()` crashes with:
AttributeError: 'NoneType' object has no attribute 'write'
This happens because the ArrowWriter was initialized only when processin... | value:https://api.github.com/repos/huggingface/datasets/issues/8132/comments | value:PR_kwDODunzps7SPyRm | value:open | value:0 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8132", "html_url": "https://github.com/huggingface/datasets/pull/8132", "diff_url": "https://github.com/huggingface/datasets/pull/8132.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8132.patch", "merged_at": null} | value:2026-04-17T18:32:45Z | value:https://api.github.com/repos/huggingface/datasets/issues/8132/labels{/name} | value:8132 | json:{"login": "KamayaniR", "id": 87941109, "node_id": "MDQ6VXNlcjg3OTQxMTA5", "avatar_url": "https://avatars.githubusercontent.com/u/87941109?v=4", "gravatar_id": "", "url": "https://api.github.com/users/KamayaniR", "html_url": "https://github.com/KamayaniR", "followers_url": "https://api.github.com/users/KamayaniR/fo... | value:False | true | |||||||||||
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There is a change in the approach to decoding JSON types, added in https://github.com/huggingface/datasets/commit/d560b58e1f1ec96591a95a1780ee118f5eea6c74. Since 4.7.0, to_list() returns raw JSON strings for columns stored as Json(), while direct access via __getitem__ returns dicts.
In ve... | value:https://api.github.com/repos/huggingface/datasets/issues/8131/comments | value:I_kwDODunzps79a_wm | value:closed | value:2 | value:2026-04-27T15:32:30Z | value:https://api.github.com/repos/huggingface/datasets/issues/8131/labels{/name} | value:8131 | json:{"login": "ItsTania", "id": 120768997, "node_id": "U_kgDOBzLJ5Q", "avatar_url": "https://avatars.githubusercontent.com/u/120768997?v=4", "gravatar_id": "", "url": "https://api.github.com/users/ItsTania", "html_url": "https://github.com/ItsTania", "followers_url": "https://api.github.com/users/ItsTania/followers", ... | true | ||||||||
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While the current callers always use `visit_path + [k]` (creating new lists), the shared default list is a latent bug ... | value:https://api.github.com/repos/huggingface/datasets/issues/8130/comments | value:PR_kwDODunzps7RoV2k | value:open | value:0 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8130", "html_url": "https://github.com/huggingface/datasets/pull/8130", "diff_url": "https://github.com/huggingface/datasets/pull/8130.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8130.patch", "merged_at": null} | value:2026-04-11T05:36:02Z | value:https://api.github.com/repos/huggingface/datasets/issues/8130/labels{/name} | value:8130 | json:{"login": "stef41", "id": 87280280, "node_id": "MDQ6VXNlcjg3MjgwMjgw", "avatar_url": "https://avatars.githubusercontent.com/u/87280280?v=4", "gravatar_id": "", "url": "https://api.github.com/users/stef41", "html_url": "https://github.com/stef41", "followers_url": "https://api.github.com/users/stef41/followers", "f... | value:False | true | |||||||||||
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Hi! I am getting a peculiar download issue on the latest versions of `datasets` and `hfh` where datasets hang indefinitely:
```py
from datasets import load_dataset
load_dataset("openai/gsm8k", "main", split="test")
```
Note that:
- streaming=True works.
- Direct Hub access works.
... | value:https://api.github.com/repos/huggingface/datasets/issues/8129/comments | value:I_kwDODunzps7800er | value:closed | value:1 | value:2026-04-10T21:07:56Z | value:https://api.github.com/repos/huggingface/datasets/issues/8129/labels{/name} | value:8129 | json:{"login": "lewtun", "id": 26859204, "node_id": "MDQ6VXNlcjI2ODU5MjA0", "avatar_url": "https://avatars.githubusercontent.com/u/26859204?v=4", "gravatar_id": "", "url": "https://api.github.com/users/lewtun", "html_url": "https://github.com/lewtun", "followers_url": "https://api.github.com/users/lewtun/followers", "f... | true | ||||||||
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I also removed old deprecated stuff linked to files list like the old concept of "post-processing" and cleaned the checksum recording logic | value:https://api.github.com/repos/huggingface/datasets/issues/8128/comments | value:PR_kwDODunzps7RfgVx | value:closed | value:1 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8128", "html_url": "https://github.com/huggingface/datasets/pull/8128", "diff_url": "https://github.com/huggingface/datasets/pull/8128.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8128.patch", "merged_at": "2026-04-16T09:23:45Z"} | value:2026-04-16T09:23:48Z | value:https://api.github.com/repos/huggingface/datasets/issues/8128/labels{/name} | value:8128 | json:{"login": "lhoestq", "id": 42851186, "node_id": "MDQ6VXNlcjQyODUxMTg2", "avatar_url": "https://avatars.githubusercontent.com/u/42851186?v=4", "gravatar_id": "", "url": "https://api.github.com/users/lhoestq", "html_url": "https://github.com/lhoestq", "followers_url": "https://api.github.com/users/lhoestq/followers"... | value:False | true | |||||||||
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This small PR allows an optional `harness` field to be parsed.
When present, the harness field takes priority over type-value heuristics.
This allows agents to self-identify even when they contain property names that collide with an existing harness ("session", "system", etc.) | value:https://api.github.com/repos/huggingface/datasets/issues/8127/comments | value:PR_kwDODunzps7Q23En | value:closed | value:4 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8127", "html_url": "https://github.com/huggingface/datasets/pull/8127", "diff_url": "https://github.com/huggingface/datasets/pull/8127.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8127.patch", "merged_at": null} | value:2026-05-12T10:10:09Z | value:https://api.github.com/repos/huggingface/datasets/issues/8127/labels{/name} | value:8127 | json:{"login": "jedisct1", "id": 124872, "node_id": "MDQ6VXNlcjEyNDg3Mg==", "avatar_url": "https://avatars.githubusercontent.com/u/124872?v=4", "gravatar_id": "", "url": "https://api.github.com/users/jedisct1", "html_url": "https://github.com/jedisct1", "followers_url": "https://api.github.com/users/jedisct1/followers"... | value:False | true | |||||||||
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Fix #8075
Fix `.batch()` on table-formatted `Dataset` and `IterableDataset`.
Before this change, calling `.batch()` on datasets formatted as `pyarrow`, `pandas`, or `polars` could fail because the batching path assumed dict-like inputs. This updates batching to use an Arrow-based path for table-... | value:https://api.github.com/repos/huggingface/datasets/issues/8126/comments | value:PR_kwDODunzps7Qz_UY | value:closed | value:1 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8126", "html_url": "https://github.com/huggingface/datasets/pull/8126", "diff_url": "https://github.com/huggingface/datasets/pull/8126.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8126.patch", "merged_at": "2026-04-10T13:14:00Z"} | value:2026-04-10T13:14:01Z | value:https://api.github.com/repos/huggingface/datasets/issues/8126/labels{/name} | value:8126 | json:{"login": "bluehyena", "id": 42088479, "node_id": "MDQ6VXNlcjQyMDg4NDc5", "avatar_url": "https://avatars.githubusercontent.com/u/42088479?v=4", "gravatar_id": "", "url": "https://api.github.com/users/bluehyena", "html_url": "https://github.com/bluehyena", "followers_url": "https://api.github.com/users/bluehyena/fo... | value:False | true | |||||||||
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For flat permission file systems, `os.chmod` simply fails when trying to cache datasets - in some places such as: https://github.com/huggingface/datasets/blob/main/src/datasets/arrow_dataset.py#L4043-L4048 for arrow datasets.
This seems to be optional to obtained desired behavior as simply c... | value:https://api.github.com/repos/huggingface/datasets/issues/8125/comments | value:I_kwDODunzps77t3eK | value:open | value:2 | value:2026-07-08T16:35:43Z | value:https://api.github.com/repos/huggingface/datasets/issues/8125/labels{/name} | value:8125 | json:{"login": "younesbelkada", "id": 49240599, "node_id": "MDQ6VXNlcjQ5MjQwNTk5", "avatar_url": "https://avatars.githubusercontent.com/u/49240599?v=4", "gravatar_id": "", "url": "https://api.github.com/users/younesbelkada", "html_url": "https://github.com/younesbelkada", "followers_url": "https://api.github.com/users/... | true | |||||||||||
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fixes (https://github.com/huggingface/datasets/issues/8116)
Basically the issue is that if a dataset column uses Json() as a feature type, calling to_json() on that dataset causes a raw json escaped string to be exported, without decoding it first.
### root cause
`to_json` exports feature values in... | value:https://api.github.com/repos/huggingface/datasets/issues/8122/comments | value:PR_kwDODunzps7P_9lo | value:closed | value:3 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8122", "html_url": "https://github.com/huggingface/datasets/pull/8122", "diff_url": "https://github.com/huggingface/datasets/pull/8122.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8122.patch", "merged_at": "2026-04-10T13:12:48Z"} | value:2026-04-10T13:12:48Z | value:https://api.github.com/repos/huggingface/datasets/issues/8122/labels{/name} | value:8122 | json:{"login": "Brianzhengca", "id": 30914529, "node_id": "MDQ6VXNlcjMwOTE0NTI5", "avatar_url": "https://avatars.githubusercontent.com/u/30914529?v=4", "gravatar_id": "", "url": "https://api.github.com/users/Brianzhengca", "html_url": "https://github.com/Brianzhengca", "followers_url": "https://api.github.com/users/Bri... | value:False | true | |||||||||
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This PR fixes `Audio.cast_storage()` so that audio path columns loaded as `large_string` can be cast to `Audio()` correctly.
## Motivation
`Dataset.from_dict({"audio": [...]})` produces a `string` column and `cast_column("audio", Audio())` works, but `load_dataset("csv", ...)` produces a `large_st... | value:https://api.github.com/repos/huggingface/datasets/issues/8121/comments | value:PR_kwDODunzps7P9H7w | value:open | value:6 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8121", "html_url": "https://github.com/huggingface/datasets/pull/8121", "diff_url": "https://github.com/huggingface/datasets/pull/8121.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8121.patch", "merged_at": null} | value:2026-04-10T21:29:05Z | value:https://api.github.com/repos/huggingface/datasets/issues/8121/labels{/name} | value:8121 | json:{"login": "pdTetteh", "id": 168739852, "node_id": "U_kgDOCg7EDA", "avatar_url": "https://avatars.githubusercontent.com/u/168739852?v=4", "gravatar_id": "", "url": "https://api.github.com/users/pdTetteh", "html_url": "https://github.com/pdTetteh", "followers_url": "https://api.github.com/users/pdTetteh/followers", ... | value:False | true | |||||||||||
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Affected instances (confirmed): atlanhq_atlan-... | value:https://api.github.com/repos/huggingface/datasets/issues/8120/comments | value:I_kwDODunzps76aTCF | value:closed | value:2 | value:2026-04-30T15:45:52Z | value:https://api.github.com/repos/huggingface/datasets/issues/8120/labels{/name} | value:8120 | json:{"login": "hetao-git", "id": 84258860, "node_id": "MDQ6VXNlcjg0MjU4ODYw", "avatar_url": "https://avatars.githubusercontent.com/u/84258860?v=4", "gravatar_id": "", "url": "https://api.github.com/users/hetao-git", "html_url": "https://github.com/hetao-git", "followers_url": "https://api.github.com/users/hetao-git/fo... | true | ||||||||
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When a dataset column uses the `Json()` feature type, calling `to_json()` writes the value as an escaped JSON string (e.g., `"{\"cat_a\":1,\"cat_b\":2}"`) instead of a native JSON object (e.g., `{"cat_a":1,"cat_b":2}`).
This causes two problems:
1. The output JSON file is not interoperable... | value:https://api.github.com/repos/huggingface/datasets/issues/8116/comments | value:I_kwDODunzps76LAf0 | value:closed | value:2 | value:2026-04-10T13:12:51Z | value:https://api.github.com/repos/huggingface/datasets/issues/8116/labels{/name} | value:8116 | json:{"login": "ain-soph", "id": 13214530, "node_id": "MDQ6VXNlcjEzMjE0NTMw", "avatar_url": "https://avatars.githubusercontent.com/u/13214530?v=4", "gravatar_id": "", "url": "https://api.github.com/users/ain-soph", "html_url": "https://github.com/ain-soph", "followers_url": "https://api.github.com/users/ain-soph/follow... | true | ||||||||
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Fixes #5752.
`IterableDataset.add_column()` lost the dataset's feature schema on every call because it delegated to `map()` without passing the `features` argument. `map()` unconditionally writes `info.features = features`, so the default `None` silently overwrote the existing schema.
**Root cause**... | value:https://api.github.com/repos/huggingface/datasets/issues/8115/comments | value:PR_kwDODunzps7PldtS | value:open | value:1 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8115", "html_url": "https://github.com/huggingface/datasets/pull/8115", "diff_url": "https://github.com/huggingface/datasets/pull/8115.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8115.patch", "merged_at": null} | value:2026-04-07T14:19:35Z | value:https://api.github.com/repos/huggingface/datasets/issues/8115/labels{/name} | value:8115 | json:{"login": "IgnazioDS", "id": 132545917, "node_id": "U_kgDOB-Z9fQ", "avatar_url": "https://avatars.githubusercontent.com/u/132545917?v=4", "gravatar_id": "", "url": "https://api.github.com/users/IgnazioDS", "html_url": "https://github.com/IgnazioDS", "followers_url": "https://api.github.com/users/IgnazioDS/follower... | value:False | true | |||||||||||
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This PR pins all GitHub Actions to their exact commit SHA instead of mutable tags or branch names.
**Why?**
Pinning to a SHA prevents supply chain attacks where a tag (e.g. `v4`) could be moved to point to malicious code.
### Changes
| Workflow | Action | Avant | Après ... | value:https://api.github.com/repos/huggingface/datasets/issues/8114/comments | value:PR_kwDODunzps7PgMNx | value:closed | value:1 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8114", "html_url": "https://github.com/huggingface/datasets/pull/8114", "diff_url": "https://github.com/huggingface/datasets/pull/8114.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8114.patch", "merged_at": "2026-04-07T14:11:31Z"} | value:2026-04-07T14:11:33Z | value:https://api.github.com/repos/huggingface/datasets/issues/8114/labels{/name} | value:8114 | json:{"login": "paulinebm", "id": 155966238, "node_id": "U_kgDOCUvbHg", "avatar_url": "https://avatars.githubusercontent.com/u/155966238?v=4", "gravatar_id": "", "url": "https://api.github.com/users/paulinebm", "html_url": "https://github.com/paulinebm", "followers_url": "https://api.github.com/users/paulinebm/follower... | value:False | true | |||||||||
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JSON Lines files are parsed so one file = one row
The resulting row has three fields: harness, session_id, traces, and file_name with features:
```python
AGENT_TRACES_FEATURES = datasets.Features(
{
"harness": datasets.Value("string"),
"session_i... | value:https://api.github.com/repos/huggingface/datasets/issues/8113/comments | value:PR_kwDODunzps7PUfD_ | value:closed | value:1 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8113", "html_url": "https://github.com/huggingface/datasets/pull/8113", "diff_url": "https://github.com/huggingface/datasets/pull/8113.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8113.patch", "merged_at": "2026-04-23T16:47:43Z"} | value:2026-04-23T16:47:45Z | value:https://api.github.com/repos/huggingface/datasets/issues/8113/labels{/name} | value:8113 | json:{"login": "lhoestq", "id": 42851186, "node_id": "MDQ6VXNlcjQyODUxMTg2", "avatar_url": "https://avatars.githubusercontent.com/u/42851186?v=4", "gravatar_id": "", "url": "https://api.github.com/users/lhoestq", "html_url": "https://github.com/lhoestq", "followers_url": "https://api.github.com/users/lhoestq/followers"... | value:False | true | |||||||||
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Fixes #5354
Replaces `list[X]` with `Sequence[X]` in function argument type annotations
across the public API. `List` is invariant while `Sequence` is covariant,
which means passing a `list` to a parameter typed as `List` causes mypy errors,
even though lists are valid sequences.
## Chan... | value:https://api.github.com/repos/huggingface/datasets/issues/8112/comments | value:PR_kwDODunzps7PMvUa | value:open | value:2 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8112", "html_url": "https://github.com/huggingface/datasets/pull/8112", "diff_url": "https://github.com/huggingface/datasets/pull/8112.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8112.patch", "merged_at": null} | value:2026-04-02T06:47:20Z | value:https://api.github.com/repos/huggingface/datasets/issues/8112/labels{/name} | value:8112 | json:{"login": "abdulhayykhan", "id": 134889827, "node_id": "U_kgDOCApBYw", "avatar_url": "https://avatars.githubusercontent.com/u/134889827?v=4", "gravatar_id": "", "url": "https://api.github.com/users/abdulhayykhan", "html_url": "https://github.com/abdulhayykhan", "followers_url": "https://api.github.com/users/abdulh... | value:False | true | |||||||||||
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Datasets like https://huggingface.co/datasets/cfahlgren1/agent-sessions contain one JSONL file per session. Without sample_by, ea... | value:https://api.github.com/repos/huggingface/datasets/issues/8111/comments | value:PR_kwDODunzps7PAKZk | value:closed | value:4 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8111", "html_url": "https://github.com/huggingface/datasets/pull/8111", "diff_url": "https://github.com/huggingface/datasets/pull/8111.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8111.patch", "merged_at": null} | value:2026-04-01T16:57:00Z | value:https://api.github.com/repos/huggingface/datasets/issues/8111/labels{/name} | value:8111 | json:{"login": "cfahlgren1", "id": 13546028, "node_id": "MDQ6VXNlcjEzNTQ2MDI4", "avatar_url": "https://avatars.githubusercontent.com/u/13546028?v=4", "gravatar_id": "", "url": "https://api.github.com/users/cfahlgren1", "html_url": "https://github.com/cfahlgren1", "followers_url": "https://api.github.com/users/cfahlgren... | value:False | true | |||||||||
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Calling `dataset.set_format('...')` resets the informative features such as `Array2D` etc. back into `List(List(Value))` and so on.
### Steps to reproduce the bug
```py
>>> dataset.features
{'lld': Array2D(shape=(None, 26), dtype='float32')}
>>> dataset.set_format('torch')
>>> dataset.fea... | value:https://api.github.com/repos/huggingface/datasets/issues/8110/comments | value:I_kwDODunzps749rc2 | value:closed | value:3 | value:2026-05-11T07:15:16Z | value:https://api.github.com/repos/huggingface/datasets/issues/8110/labels{/name} | value:8110 | json:{"login": "plutonium-239", "id": 29684689, "node_id": "MDQ6VXNlcjI5Njg0Njg5", "avatar_url": "https://avatars.githubusercontent.com/u/29684689?v=4", "gravatar_id": "", "url": "https://api.github.com/users/plutonium-239", "html_url": "https://github.com/plutonium-239", "followers_url": "https://api.github.com/users/... | true | ||||||||
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## Changes
### README.md
- Fix duplicate word: "frameworks frameworks" → "frameworks"
- Standardize ... | value:https://api.github.com/repos/huggingface/datasets/issues/8109/comments | value:PR_kwDODunzps7Onjr6 | value:closed | value:0 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8109", "html_url": "https://github.com/huggingface/datasets/pull/8109", "diff_url": "https://github.com/huggingface/datasets/pull/8109.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8109.patch", "merged_at": null} | value:2026-08-19T13:44:21Z | value:https://api.github.com/repos/huggingface/datasets/issues/8109/labels{/name} | value:8109 | json:{"login": "Edge-Explorer", "id": 192764477, "node_id": "U_kgDOC31aPQ", "avatar_url": "https://avatars.githubusercontent.com/u/192764477?v=4", "gravatar_id": "", "url": "https://api.github.com/users/Edge-Explorer", "html_url": "https://github.com/Edge-Explorer", "followers_url": "https://api.github.com/users/Edge-E... | value:False | true | |||||||||
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Closes #7699 | value:https://api.github.com/repos/huggingface/datasets/issues/8107/comments | value:PR_kwDODunzps7N0KQH | value:open | value:0 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8107", "html_url": "https://github.com/huggingface/datasets/pull/8107", "diff_url": "https://github.com/huggingface/datasets/pull/8107.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8107.patch", "merged_at": null} | value:2026-03-26T18:43:47Z | value:https://api.github.com/repos/huggingface/datasets/issues/8107/labels{/name} | value:8107 | json:{"login": "jingwangl", "id": 161790061, "node_id": "U_kgDOCaS4bQ", "avatar_url": "https://avatars.githubusercontent.com/u/161790061?v=4", "gravatar_id": "", "url": "https://api.github.com/users/jingwangl", "html_url": "https://github.com/jingwangl", "followers_url": "https://api.github.com/users/jingwangl/follower... | value:False | true | |||||||||||
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Previously, passing identical keys caused a confusing Python `TypeError` during unpacking. This fix intercepts the duplicates early and raises a clear `ValueError... | value:https://api.github.com/repos/huggingface/datasets/issues/8106/comments | value:PR_kwDODunzps7Nowf0 | value:open | value:0 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8106", "html_url": "https://github.com/huggingface/datasets/pull/8106", "diff_url": "https://github.com/huggingface/datasets/pull/8106.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8106.patch", "merged_at": null} | value:2026-03-26T09:03:47Z | value:https://api.github.com/repos/huggingface/datasets/issues/8106/labels{/name} | value:8106 | json:{"login": "lohith360", "id": 217548139, "node_id": "U_kgDODPeFaw", "avatar_url": "https://avatars.githubusercontent.com/u/217548139?v=4", "gravatar_id": "", "url": "https://api.github.com/users/lohith360", "html_url": "https://github.com/lohith360", "followers_url": "https://api.github.com/users/lohith360/follower... | value:False | true | |||||||||||
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For PyTorch 2.11 + torchvision 0.26.0 when using the datasets library and setting the format to "torch", an ImportError occurs because the datasets library attempts to import VideoReader from torchvision.io, but this object is not found in the installed torchvision version.
**Error message*... | value:https://api.github.com/repos/huggingface/datasets/issues/8085/comments | value:I_kwDODunzps71k8L4 | value:closed | value:1 | value:2026-03-23T14:23:25Z | value:https://api.github.com/repos/huggingface/datasets/issues/8085/labels{/name} | value:8085 | json:{"login": "DamJanusz", "id": 186563008, "node_id": "U_kgDOCx65wA", "avatar_url": "https://avatars.githubusercontent.com/u/186563008?v=4", "gravatar_id": "", "url": "https://api.github.com/users/DamJanusz", "html_url": "https://github.com/DamJanusz", "followers_url": "https://api.github.com/users/DamJanusz/follower... | true | ||||||||
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### Summary
- JSON Lines : Resharding splits files by line boundaries (only when num_shards is specified)
- CSV : Resharding splits files by line boundaries (only ... | value:https://api.github.com/repos/huggingface/datasets/issues/8084/comments | value:PR_kwDODunzps7MYMNy | value:open | value:4 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8084", "html_url": "https://github.com/huggingface/datasets/pull/8084", "diff_url": "https://github.com/huggingface/datasets/pull/8084.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8084.patch", "merged_at": null} | value:2026-04-07T13:04:17Z | value:https://api.github.com/repos/huggingface/datasets/issues/8084/labels{/name} | value:8084 | json:{"login": "muyihao", "id": 37872457, "node_id": "MDQ6VXNlcjM3ODcyNDU3", "avatar_url": "https://avatars.githubusercontent.com/u/37872457?v=4", "gravatar_id": "", "url": "https://api.github.com/users/muyihao", "html_url": "https://github.com/muyihao", "followers_url": "https://api.github.com/users/muyihao/followers"... | value:False | true | |||||||||||
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I also took the opportunity to improve the arrow logic to not have to do an unnecessary python -> arrow -> python in FormattedExamplesIterable when streaming webdatasets | value:https://api.github.com/repos/huggingface/datasets/issues/8081/comments | value:PR_kwDODunzps7L6ktq | value:closed | value:1 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8081", "html_url": "https://github.com/huggingface/datasets/pull/8081", "diff_url": "https://github.com/huggingface/datasets/pull/8081.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8081.patch", "merged_at": "2026-03-19T17:29:39Z"} | value:2026-03-19T17:35:40Z | value:https://api.github.com/repos/huggingface/datasets/issues/8081/labels{/name} | value:8081 | json:{"login": "lhoestq", "id": 42851186, "node_id": "MDQ6VXNlcjQyODUxMTg2", "avatar_url": "https://avatars.githubusercontent.com/u/42851186?v=4", "gravatar_id": "", "url": "https://api.github.com/users/lhoestq", "html_url": "https://github.com/lhoestq", "followers_url": "https://api.github.com/users/lhoestq/followers"... | value:False | true | |||||||||
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This PR makes a minor change to the `cast_storage` method in the `Json` feature, updating its return type and documentation to better reflect its intended functionality.
* Updated the `cast_storage` method to return a `pa.JsonArray` instead of a `pa.Int64Array`, and rev... | value:https://api.github.com/repos/huggingface/datasets/issues/8080/comments | value:PR_kwDODunzps7L3DFR | value:closed | value:1 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8080", "html_url": "https://github.com/huggingface/datasets/pull/8080", "diff_url": "https://github.com/huggingface/datasets/pull/8080.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8080.patch", "merged_at": "2026-03-19T14:22:47Z"} | value:2026-03-19T14:22:47Z | value:https://api.github.com/repos/huggingface/datasets/issues/8080/labels{/name} | value:8080 | 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... | value:False | true | |||||||||
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As titled
### Steps to reproduce the bug
Running following Python script:
```
"""
Reproducer for HuggingFace datasets 4.x bug:
StepExamplesIterable._iter_arrow drops samples for non-zero ranks
when Arrow batches have size 1 (e.g. single-shard streaming WebDataset).
Bug: split_dataset_by_... | value:https://api.github.com/repos/huggingface/datasets/issues/8079/comments | value:I_kwDODunzps70VYi- | value:closed | value:0 | value:2026-03-19T17:29:40Z | value:https://api.github.com/repos/huggingface/datasets/issues/8079/labels{/name} | value:8079 | json:{"login": "wwwjn", "id": 40016222, "node_id": "MDQ6VXNlcjQwMDE2MjIy", "avatar_url": "https://avatars.githubusercontent.com/u/40016222?v=4", "gravatar_id": "", "url": "https://api.github.com/users/wwwjn", "html_url": "https://github.com/wwwjn", "followers_url": "https://api.github.com/users/wwwjn/followers", "follo... | true | |||||||
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Describe the bug
Some files in the Dangindev/viet-cultural-vqa dataset fail to load via the Hugging Face datasets library.
xet-hosted files load fine
LFS-hosted files sometimes fail
Example:
Fails: https://huggingface.co/datasets/Dangindev/viet-cultural-vqa/blob/main/images/am_thuc/banh_c... | value:https://api.github.com/repos/huggingface/datasets/issues/8078/comments | value:I_kwDODunzps7zk_cT | value:closed | value:3 | value:2026-03-30T04:14:29Z | value:https://api.github.com/repos/huggingface/datasets/issues/8078/labels{/name} | value:8078 | json:{"login": "ngayngo9x", "id": 1835469, "node_id": "MDQ6VXNlcjE4MzU0Njk=", "avatar_url": "https://avatars.githubusercontent.com/u/1835469?v=4", "gravatar_id": "", "url": "https://api.github.com/users/ngayngo9x", "html_url": "https://github.com/ngayngo9x", "followers_url": "https://api.github.com/users/ngayngo9x/foll... | true | ||||||||
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For example:
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A collection of fixes and long-overdue feature completions that kept getting pushed off as TODO(QL) comments. Nothing here is a dramatic architectural change, mostly things that were partiall... | value:https://api.github.com/repos/huggingface/datasets/issues/8068/comments | value:PR_kwDODunzps7Kwbp4 | value:closed | value:7 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8068", "html_url": "https://github.com/huggingface/datasets/pull/8068", "diff_url": "https://github.com/huggingface/datasets/pull/8068.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8068.patch", "merged_at": "2026-03-16T22:54:07Z"} | value:2026-03-17T17:33:57Z | value:https://api.github.com/repos/huggingface/datasets/issues/8068/labels{/name} | value:8068 | 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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- update `Dataset.from_csv`, `from_json`, `from_parquet`, and `from_text` type hints from `list[PathLike]` to `Sequence[PathLike]`
- normalize non-string sequences to lists before passing paths to readers
- add path-type tests to cover tuple input for all four loaders
## Why
`list` is invariant for st... | value:https://api.github.com/repos/huggingface/datasets/issues/8067/comments | value:PR_kwDODunzps7KpJ1W | value:open | value:0 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8067", "html_url": "https://github.com/huggingface/datasets/pull/8067", "diff_url": "https://github.com/huggingface/datasets/pull/8067.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8067.patch", "merged_at": null} | value:2026-03-14T20:37:21Z | value:https://api.github.com/repos/huggingface/datasets/issues/8067/labels{/name} | value:8067 | json:{"login": "biefan", "id": 70761325, "node_id": "MDQ6VXNlcjcwNzYxMzI1", "avatar_url": "https://avatars.githubusercontent.com/u/70761325?v=4", "gravatar_id": "", "url": "https://api.github.com/users/biefan", "html_url": "https://github.com/biefan", "followers_url": "https://api.github.com/users/biefan/followers", "f... | value:False | true | |||||||||||
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- avoid duplicate keyword collisions when `config_kwargs` overlap with module-provided `builder_kwargs` in `load_dataset_builder`
- this fixes cases like passing `base_path=...` where `base_path` is already present in `builder_kwargs`
- add a regression test using a local dataset directory to ensure ov... | value:https://api.github.com/repos/huggingface/datasets/issues/8066/comments | value:PR_kwDODunzps7KpFze | value:closed | value:1 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8066", "html_url": "https://github.com/huggingface/datasets/pull/8066", "diff_url": "https://github.com/huggingface/datasets/pull/8066.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8066.patch", "merged_at": null} | value:2026-03-17T00:04:08Z | value:https://api.github.com/repos/huggingface/datasets/issues/8066/labels{/name} | value:8066 | json:{"login": "biefan", "id": 70761325, "node_id": "MDQ6VXNlcjcwNzYxMzI1", "avatar_url": "https://avatars.githubusercontent.com/u/70761325?v=4", "gravatar_id": "", "url": "https://api.github.com/users/biefan", "html_url": "https://github.com/biefan", "followers_url": "https://api.github.com/users/biefan/followers", "f... | value:False | true | |||||||||
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`datasets` 4.0 moved to using `torchcodec` for audio datasets, which doesn't support ARM hardware under Linux and Windows
### Steps to reproduce the bug
try:
* Try to install `torchcodec` under Linux ARM64
or:
* Try to install `torchcodec` under Windows ARM64
or, on either of those pla... | value:https://api.github.com/repos/huggingface/datasets/issues/8065/comments | value:I_kwDODunzps7yzk24 | value:open | value:8 | value:2026-10-02T01:08:22Z | value:https://api.github.com/repos/huggingface/datasets/issues/8065/labels{/name} | value:8065 | json:{"login": "leondz", "id": 121934, "node_id": "MDQ6VXNlcjEyMTkzNA==", "avatar_url": "https://avatars.githubusercontent.com/u/121934?v=4", "gravatar_id": "", "url": "https://api.github.com/users/leondz", "html_url": "https://github.com/leondz", "followers_url": "https://api.github.com/users/leondz/followers", "follo... | true | |||||||||||
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- [x] load_dataset("csv", data_files=["hf://buckets/..."])
- [x] load_dataset("buckets/...")
- [x] Dataset.to_csv("hf://buckets/..."), to_json, to_parquet, etc.
- [x] DatasetDict.push_to_hub("buckets/...")
- [x] Dataset.push_to_hub("buckets/...")
- [x] DatasetDict.push_to_hub("buckets/...")
- [x] Ite... | value:https://api.github.com/repos/huggingface/datasets/issues/8064/comments | value:PR_kwDODunzps7KDQH- | value:closed | value:1 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8064", "html_url": "https://github.com/huggingface/datasets/pull/8064", "diff_url": "https://github.com/huggingface/datasets/pull/8064.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8064.patch", "merged_at": "2026-03-16T15:45:54Z"} | value:2026-03-16T15:45:56Z | value:https://api.github.com/repos/huggingface/datasets/issues/8064/labels{/name} | value:8064 | json:{"login": "lhoestq", "id": 42851186, "node_id": "MDQ6VXNlcjQyODUxMTg2", "avatar_url": "https://avatars.githubusercontent.com/u/42851186?v=4", "gravatar_id": "", "url": "https://api.github.com/users/lhoestq", "html_url": "https://github.com/lhoestq", "followers_url": "https://api.github.com/users/lhoestq/followers"... | value:False | true | |||||||||
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This handling of num_proc is as close to identical as the handling in IterableDataset.push_to_hub | value:https://api.github.com/repos/huggingface/datasets/issues/8062/comments | value:PR_kwDODunzps7KALNc | value:closed | value:1 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8062", "html_url": "https://github.com/huggingface/datasets/pull/8062", "diff_url": "https://github.com/huggingface/datasets/pull/8062.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8062.patch", "merged_at": null} | value:2026-03-17T00:10:20Z | value:https://api.github.com/repos/huggingface/datasets/issues/8062/labels{/name} | value:8062 | json:{"login": "HaukurPall", "id": 9451463, "node_id": "MDQ6VXNlcjk0NTE0NjM=", "avatar_url": "https://avatars.githubusercontent.com/u/9451463?v=4", "gravatar_id": "", "url": "https://api.github.com/users/HaukurPall", "html_url": "https://github.com/HaukurPall", "followers_url": "https://api.github.com/users/HaukurPall/... | value:False | true | |||||||||
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when an invalid data_files entry is provided.
The new message clearly explains the expected dictionary format:
{'split': <split_name>, 'path': <path_or_list_of_paths>}
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new `Mesh`feature class, which manages 3D data via a PyArrow `struct` containing both raw bytes and file paths. s... | value:https://api.github.com/repos/huggingface/datasets/issues/8055/comments | value:PR_kwDODunzps7I6knM | value:closed | value:4 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8055", "html_url": "https://github.com/huggingface/datasets/pull/8055", "diff_url": "https://github.com/huggingface/datasets/pull/8055.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8055.patch", "merged_at": "2026-05-27T15:07:13Z"} | value:2026-10-28T13:36:35Z | value:https://api.github.com/repos/huggingface/datasets/issues/8055/labels{/name} | value:8055 | json:{"login": "Vinay-Umrethe", "id": 175500353, "node_id": "U_kgDOCnXsQQ", "avatar_url": "https://avatars.githubusercontent.com/u/175500353?v=4", "gravatar_id": "", "url": "https://api.github.com/users/Vinay-Umrethe", "html_url": "https://github.com/Vinay-Umrethe", "followers_url": "https://api.github.com/users/Vinay-... | value:False | true | |||||||||
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**Reporter:** Conner Webber (conner.webber000@gmail.com)
**Severity:** HIGH (CVSS 3.1: 8.2)
**CWE:** CWE-22 (Improper Limitation of a Pathname to a Restricted Directory)
## Summary
The `ZipExtractor`, `RarExtractor`, and `SevenZipExtractor` classes in `datasets/utils/extract.py... | value:https://api.github.com/repos/huggingface/datasets/issues/8052/comments | value:I_kwDODunzps7w65yv | value:closed | value:3 | value:2026-03-10T23:27:45Z | value:https://api.github.com/repos/huggingface/datasets/issues/8052/labels{/name} | value:8052 | json:{"login": "spartan8806", "id": 39662153, "node_id": "MDQ6VXNlcjM5NjYyMTUz", "avatar_url": "https://avatars.githubusercontent.com/u/39662153?v=4", "gravatar_id": "", "url": "https://api.github.com/users/spartan8806", "html_url": "https://github.com/spartan8806", "followers_url": "https://api.github.com/users/sparta... | true | ||||||||
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It updates the features argument in IterableDataset.filter() to preserve existing features when ex_iterable.is_typed is True. This prevents the TypeError: 'NoneType' object is not a mapping from being raised when chaining multiple .filter() calls. | value:https://api.github.com/repos/huggingface/datasets/issues/8050/comments | value:PR_kwDODunzps7IurXm | value:closed | value:1 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8050", "html_url": "https://github.com/huggingface/datasets/pull/8050", "diff_url": "https://github.com/huggingface/datasets/pull/8050.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8050.patch", "merged_at": null} | value:2026-03-09T17:45:32Z | value:https://api.github.com/repos/huggingface/datasets/issues/8050/labels{/name} | value:8050 | json:{"login": "Sanket291", "id": 114303401, "node_id": "U_kgDOBtAhqQ", "avatar_url": "https://avatars.githubusercontent.com/u/114303401?v=4", "gravatar_id": "", "url": "https://api.github.com/users/Sanket291", "html_url": "https://github.com/Sanket291", "followers_url": "https://api.github.com/users/Sanket291/follower... | value:False | true | |||||||||
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In `datasets` library we have options to load `image` and `audio` datasets which can be viewed in the Dataset Viewer.
LIKE:
```bash
from datasets import load_dataset, Image
from datasets import load_dataset, Audio
```
> https://huggingface.co/docs/datasets/en/image_load & https://huggingface... | value:https://api.github.com/repos/huggingface/datasets/issues/8048/comments | value:I_kwDODunzps7wTYiu | value:closed | value:1 | value:2026-06-02T17:40:12Z | value:https://api.github.com/repos/huggingface/datasets/issues/8048/labels{/name} | value:8048 | json:{"login": "Vinay-Umrethe", "id": 175500353, "node_id": "U_kgDOCnXsQQ", "avatar_url": "https://avatars.githubusercontent.com/u/175500353?v=4", "gravatar_id": "", "url": "https://api.github.com/users/Vinay-Umrethe", "html_url": "https://github.com/Vinay-Umrethe", "followers_url": "https://api.github.com/users/Vinay-... | true | ||||||||
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The existing `_check_if_features_can_be_aligned` and `_align_features` only handled top-level `... | value:https://api.github.com/repos/huggingface/datasets/issues/8047/comments | value:PR_kwDODunzps7IUKWg | value:closed | value:1 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8047", "html_url": "https://github.com/huggingface/datasets/pull/8047", "diff_url": "https://github.com/huggingface/datasets/pull/8047.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8047.patch", "merged_at": "2026-03-09T17:52:12Z"} | value:2026-03-09T17:52:12Z | value:https://api.github.com/repos/huggingface/datasets/issues/8047/labels{/name} | value:8047 | json:{"login": "ain-soph", "id": 13214530, "node_id": "MDQ6VXNlcjEzMjE0NTMw", "avatar_url": "https://avatars.githubusercontent.com/u/13214530?v=4", "gravatar_id": "", "url": "https://api.github.com/users/ain-soph", "html_url": "https://github.com/ain-soph", "followers_url": "https://api.github.com/users/ain-soph/follow... | value:False | true | |||||||||
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When using `Dataset.map()` with `num_proc > 1`, if the map function produces a list column where some shards contain only empty lists `[]` and other shards contain non-empty lists of structs, the feature type inference is inconsistent across shards:
- Shards with only empty lists → `List(Va... | value:https://api.github.com/repos/huggingface/datasets/issues/8046/comments | value:I_kwDODunzps7wOjwo | value:closed | value:1 | value:2026-03-09T17:52:13Z | value:https://api.github.com/repos/huggingface/datasets/issues/8046/labels{/name} | value:8046 | json:{"login": "ain-soph", "id": 13214530, "node_id": "MDQ6VXNlcjEzMjE0NTMw", "avatar_url": "https://avatars.githubusercontent.com/u/13214530?v=4", "gravatar_id": "", "url": "https://api.github.com/users/ain-soph", "html_url": "https://github.com/ain-soph", "followers_url": "https://api.github.com/users/ain-soph/follow... | true | ||||||||
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`pa.concat_tables(list(...))` before writing. For datasets with large shards and multiprocessing (push_to_hub with num_proc > 0) the memory requirements can be really large.
This PR writes parquet incrementally by iterating Arrow bat... | value:https://api.github.com/repos/huggingface/datasets/issues/8045/comments | value:PR_kwDODunzps7IPA1N | value:open | value:2 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8045", "html_url": "https://github.com/huggingface/datasets/pull/8045", "diff_url": "https://github.com/huggingface/datasets/pull/8045.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8045.patch", "merged_at": null} | value:2026-03-11T12:30:57Z | value:https://api.github.com/repos/huggingface/datasets/issues/8045/labels{/name} | value:8045 | json:{"login": "HaukurPall", "id": 9451463, "node_id": "MDQ6VXNlcjk0NTE0NjM=", "avatar_url": "https://avatars.githubusercontent.com/u/9451463?v=4", "gravatar_id": "", "url": "https://api.github.com/users/HaukurPall", "html_url": "https://github.com/HaukurPall", "followers_url": "https://api.github.com/users/HaukurPall/... | value:False | true | |||||||||||
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When `num_proc` exceeds the number of output shards in `Dataset.push_to_hub`, workers
without assigned output shards silently drop their data. The metadata still reports the
correct dataset length (using `len(self[split])`), masking the data loss.
This fix caps `num_jobs` at `num_shards` in `_p... | value:https://api.github.com/repos/huggingface/datasets/issues/8044/comments | value:PR_kwDODunzps7IMNl4 | value:closed | value:0 | json:{"url": "https://api.github.com/repos/huggingface/datasets/pulls/8044", "html_url": "https://github.com/huggingface/datasets/pull/8044", "diff_url": "https://github.com/huggingface/datasets/pull/8044.diff", "patch_url": "https://github.com/huggingface/datasets/pull/8044.patch", "merged_at": "2026-03-09T17:22:00Z"} | value:2026-03-11T12:31:20Z | value:https://api.github.com/repos/huggingface/datasets/issues/8044/labels{/name} | value:8044 | json:{"login": "HaukurPall", "id": 9451463, "node_id": "MDQ6VXNlcjk0NTE0NjM=", "avatar_url": "https://avatars.githubusercontent.com/u/9451463?v=4", "gravatar_id": "", "url": "https://api.github.com/users/HaukurPall", "html_url": "https://github.com/HaukurPall", "followers_url": "https://api.github.com/users/HaukurPall/... | value:False | true | |||||||||
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`streaming=True**kwargs,` should be `streaming=True, **kwargs,`
https://github.com/huggingface/datasets/blob/81027be09d5cd9f06a6d64ef1a8a3e9ebd0f86fd/src/datasets/iterable_dataset.py#L2950
### Steps to reproduce the bug
```
from Datasets import Dataset
IterableDataset.from_csv("file.csv")
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