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https://api.github.com/repos/huggingface/datasets/issues/8162 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8162/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8162/comments | https://api.github.com/repos/huggingface/datasets/issues/8162/events | https://github.com/huggingface/datasets/pull/8162 | 4,353,153,600 | PR_kwDODunzps7W2QFE | 8,162 | Include all test files in sdist via MANIFEST.in | {
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## What's wrong
The sdist on PyPI for `datasets==4.8.5` only ships **37 of the 95** files under `tests/`. Without an explicit `MANIFEST.in`, setuptools' default sdist behavior includes only top-level `tests/test_*.py` files and drops everything else.
Files missing from the current sdist:
- `tests/conft... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/8160 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8160/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8160/comments | https://api.github.com/repos/huggingface/datasets/issues/8160/events | https://github.com/huggingface/datasets/pull/8160 | 4,349,215,301 | PR_kwDODunzps7WpIIx | 8,160 | feat: add TsFile (Apache IoTDB) packaged builder with per-device wide format | {
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"Hi team 👋\n\nA bit of background on me: I'm a PMC member of both [Apache TsFile](https://tsfile.apache.org/) and [Apache IoTDB](https://iotdb.apache.org/), and one of the core contributors to the TsFile format specification and its Python SDK ([`tsfile` on PyPI](https://pypi.org/project/tsfile/)). I've been worki... | 2026-04-29T09:07:25 | 2026-04-29T10:23:04 | null | null | NONE | [] | null | null | false | {
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} | Closes #7922
## 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.
### Data ... | null | {
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Version: 4.8.5
### Steps to reproduce the bug
n/a
### Expected behavior
n/a
### Environment info
n/a | null | {
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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.
This happens becaus... | null | {
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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 home di... | null | {
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kinda related: https://github.com/huggingface/datasets/issues/5717 | {
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"Is it open for contribution?",
"I think arbitrary filesystems would be recreated in every thread in any case, unlike HfFileSystem which has custom code to handle this."
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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 from g... | null | {
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} | # Add Apache Iceberg format support
## 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 data t... | null | {
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"I took the liberty of adjusting the fix to still use the iter_arrow in `FormattedExampl... | 2026-04-23T00:03:14 | 2026-04-27T14:03:27 | 2026-04-27T14:03:26 | null | CONTRIBUTOR | [] | null | null | false | {
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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 iteration whe... | {
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} | ## Summary
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 `Perm... | null | {
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"I think this line here is causing issues: \nhttps://github.com/huggingface/datasets/blob/2724a653e7582077be647d3fdfe8cd1fac27b85f/src/datasets/iterable_dataset.py#L2225\nIt ignored force_convert_to_python, so it consumed a full Arrow chunk.\nI think it can be fixed if you add `self.force_convert_to_python` to the ... | 2026-04-22T03:08:39 | 2026-04-27T14:03:28 | 2026-04-27T14:03:28 | null | NONE | [] | null | null | null | null | ### Describe the bug
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 = Dataset.fr... | {
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} | ## What does this PR do?
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
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https://api.github.com/repos/huggingface/datasets/issues/8143 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8143/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8143/comments | https://api.github.com/repos/huggingface/datasets/issues/8143/events | https://github.com/huggingface/datasets/pull/8143 | 4,296,535,961 | PR_kwDODunzps7T_YeI | 8,143 | tag openclaw sessions via cwd in pi agent traces | {
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"The docs for this PR live [here](https://moon-ci-docs.huggingface.co/docs/datasets/pr_8143). All of your documentation changes will be reflected on that endpoint. The docs are available until 30 days after the last update."
] | 2026-04-20T14:45:50 | 2026-04-21T09:02:10 | 2026-04-21T09:02:08 | null | CONTRIBUTOR | [] | null | null | false | {
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cc: @merveenoyan | {
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https://api.github.com/repos/huggingface/datasets/issues/8142 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8142/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8142/comments | https://api.github.com/repos/huggingface/datasets/issues/8142/events | https://github.com/huggingface/datasets/pull/8142 | 4,292,299,784 | PR_kwDODunzps7Txzfw | 8,142 | fix: replace list with Sequence in public API type hints | {
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} | Fixes #5354
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` — remov... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/8141 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8141/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8141/comments | https://api.github.com/repos/huggingface/datasets/issues/8141/events | https://github.com/huggingface/datasets/pull/8141 | 4,280,918,239 | PR_kwDODunzps7TOjAR | 8,141 | Fix Image feature to dynamically select pyarrow storage type for large binary/string inputs | {
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"Hi ! if the goal to fix the linked issue maybe we can find a simpler approach.\r\n\r\nWhile your PR seems to solve it, it needs extra careful attention to not add regressions for image datasets, in particular when it comes to data with mixes of both binary and large_binary\r\n\r\ne.g.\r\n- concatenating image data... | 2026-04-17T07:28:01 | 2026-04-28T12:32:43 | null | null | NONE | [] | null | null | true | {
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} | Add dynamic pyarrow storage type selection to the Image feature so that pa.large_binary() and pa.large_string() inputs are preserved natively instead of being cast down to pa.binary() / pa.string()
Introduce _get_target_pa_type() to detect large types from incoming storage and _to_struct_storage() to build struct arra... | {
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https://api.github.com/repos/huggingface/datasets/issues/8140 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8140/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8140/comments | https://api.github.com/repos/huggingface/datasets/issues/8140/events | https://github.com/huggingface/datasets/pull/8140 | 4,276,066,629 | PR_kwDODunzps7S-0aR | 8,140 | fix warning in ci | {
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"The docs for this PR live [here](https://moon-ci-docs.huggingface.co/docs/datasets/pr_8140). All of your documentation changes will be reflected on that endpoint. The docs are available until 30 days after the last update."
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"merged_at": "2026-04-16T13:35... | otherwise it raises an issue from transformers smh
```
../../.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)
../../.pyenv/versions/3.12.2/lib/python3.12/importlib/__init__.py:90: ... | {
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https://api.github.com/repos/huggingface/datasets/issues/8139 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8139/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8139/comments | https://api.github.com/repos/huggingface/datasets/issues/8139/events | https://github.com/huggingface/datasets/pull/8139 | 4,275,963,570 | PR_kwDODunzps7S-fAg | 8,139 | update ci uer | {
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https://api.github.com/repos/huggingface/datasets/issues/8138 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8138/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8138/comments | https://api.github.com/repos/huggingface/datasets/issues/8138/events | https://github.com/huggingface/datasets/pull/8138 | 4,275,574,837 | PR_kwDODunzps7S9OiA | 8,138 | chore: bump doc-builder SHA for main doc build workflow | {
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"The docs for this PR live [here](https://moon-ci-docs.huggingface.co/docs/datasets/pr_8138). All of your documentation changes will be reflected on that endpoint. The docs are available until 30 days after the last update.",
"Closing — not needed right now, active libs already on @main."
] | 2026-04-16T12:03:28 | 2026-04-17T09:16:40 | 2026-04-17T09:16:39 | null | CONTRIBUTOR | [] | null | null | true | {
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} | Bump the pinned doc-builder SHA so that main documentation builds also sync to the HF bucket (dual-write).
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https://api.github.com/repos/huggingface/datasets/issues/8137 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8137/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8137/comments | https://api.github.com/repos/huggingface/datasets/issues/8137/events | https://github.com/huggingface/datasets/pull/8137 | 4,275,524,898 | PR_kwDODunzps7S9ENL | 8,137 | Fix: decode JSON type before to_list or to_dict is called | {
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"@lhoestq Could this be reviewed and merged if it's a suitable solution?",
"The docs for this PR live [here](https://moon-ci-docs.huggingface.co/docs/datasets/pr_8137). All of your documentation changes will be reflected on that endpoint. The docs are available until 30 days after the last update.",
"`datasets`... | 2026-04-16T11:54:09 | 2026-04-27T15:49:42 | 2026-04-27T15:32:29 | null | CONTRIBUTOR | [] | null | null | false | {
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"merged_at": "2026-04-27T15:32... | **Motivation**:
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 prior t... | {
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https://api.github.com/repos/huggingface/datasets/issues/8136 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8136/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8136/comments | https://api.github.com/repos/huggingface/datasets/issues/8136/events | https://github.com/huggingface/datasets/pull/8136 | 4,272,360,448 | PR_kwDODunzps7Sz4Iz | 8,136 | Remove print statement in JSON processing | {
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https://api.github.com/repos/huggingface/datasets/issues/8135 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8135/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8135/comments | https://api.github.com/repos/huggingface/datasets/issues/8135/events | https://github.com/huggingface/datasets/pull/8135 | 4,268,369,489 | PR_kwDODunzps7Sm752 | 8,135 | Add Zarr / OME-Zarr Dataset Support | {
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"How does this PR related to the existing one at https://github.com/huggingface/datasets/pull/7983 ?\r\nThey could be complementary, maybe it's worth checking how we can take the best of both PRs ?",
"Hi @lhoestq, thanks for your reply. \r\n\r\nMy understanding is that #7983 models a **Zarr store as a dataset**: ... | 2026-04-15T10:57:18 | 2026-04-16T11:31:31 | null | null | NONE | [] | null | null | false | {
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} | # Add Zarr / OME-Zarr Dataset Support
## TL;DR
This PR adds support for Zarr-backed datasets to `datasets`, with a focus on lazy, streaming-friendly access to large multidimensional arrays. It introduces a new `Zarr` feature, lazy proxy objects for arrays, groups, and OME-Zarr multiscale images, a `zarrfolder` pa... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/8134 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8134/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8134/comments | https://api.github.com/repos/huggingface/datasets/issues/8134/events | https://github.com/huggingface/datasets/pull/8134 | 4,267,351,322 | PR_kwDODunzps7SkBKa | 8,134 | chore: bump doc-builder SHA for PR upload workflow | {
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"The docs for this PR live [here](https://moon-ci-docs.huggingface.co/docs/datasets/pr_8134). All of your documentation changes will be reflected on that endpoint. The docs are available until 30 days after the last update."
] | 2026-04-15T08:19:11 | 2026-04-15T10:15:12 | 2026-04-15T10:15:10 | null | CONTRIBUTOR | [] | null | null | false | {
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https://api.github.com/repos/huggingface/datasets/issues/8133 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8133/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8133/comments | https://api.github.com/repos/huggingface/datasets/issues/8133/events | https://github.com/huggingface/datasets/pull/8133 | 4,264,953,406 | PR_kwDODunzps7Sczz9 | 8,133 | use full repo-relative file path instead of filename for agent traces | {
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"The docs for this PR live [here](https://moon-ci-docs.huggingface.co/docs/datasets/pr_8133). All of your documentation changes will be reflected on that endpoint. The docs are available until 30 days after the last update.",
"thanks ! let me push some adjustments, and yea let's use file_path instead"
] | 2026-04-14T21:56:43 | 2026-04-15T11:18:56 | 2026-04-15T11:18:54 | null | CONTRIBUTOR | [] | null | null | false | {
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"merged_at": "2026-04-15T11:18... | We want to include full path of the file so it's easier to fetch the full trace from repo
- 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-aee0-1fdd053335e7.js... | {
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https://api.github.com/repos/huggingface/datasets/issues/8132 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8132/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8132/comments | https://api.github.com/repos/huggingface/datasets/issues/8132/events | https://github.com/huggingface/datasets/pull/8132 | 4,260,846,283 | PR_kwDODunzps7SPyRm | 8,132 | fix(Dataset.map): initialize writer on first non-None output instead of first index | {
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} | ## What does this PR do?
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 processing
ind... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/8131 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8131/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8131/comments | https://api.github.com/repos/huggingface/datasets/issues/8131/events | https://github.com/huggingface/datasets/issues/8131 | 4,251,712,550 | I_kwDODunzps79a_wm | 8,131 | datasets.to_list: Behaviour change in version 4.7.0 with the addition of JSON type | {
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"I think we can go for the same approach as in https://github.com/huggingface/datasets/pull/8122 which decodes the JSON data (and supports JSON nested in other objects)\n\n(Or decide to decode all the features types, which I think could make sense, but this needs more careful handling so this should be discussed in... | 2026-04-13T06:06:43 | 2026-04-27T15:32:30 | 2026-04-27T15:32:30 | null | CONTRIBUTOR | [] | null | null | null | null | ### Describe the bug
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... | {
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https://api.github.com/repos/huggingface/datasets/issues/8130 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8130/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8130/comments | https://api.github.com/repos/huggingface/datasets/issues/8130/events | https://github.com/huggingface/datasets/pull/8130 | 4,243,231,129 | PR_kwDODunzps7RoV2k | 8,130 | fix: mutable default argument in `_visit_with_path` | {
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} | Replace `visit_path: _VisitPath = []` with `Optional[_VisitPath] = None` to avoid the mutable default argument anti-pattern ([B006](https://docs.astral.sh/ruff/rules/mutable-argument-default/)).
While the current callers always use `visit_path + [k]` (creating new lists), the shared default list is a latent bug that w... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/8129 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8129/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8129/comments | https://api.github.com/repos/huggingface/datasets/issues/8129/events | https://github.com/huggingface/datasets/issues/8129 | 4,241,704,875 | I_kwDODunzps7800er | 8,129 | `load_dataset()` hangs when `hf_xet` is enabled | {
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"Apologies, seems to have been a stale cache issue. Nuking the datasets cache fixed the issue"
] | 2026-04-10T21:00:24 | 2026-04-10T21:07:56 | 2026-04-10T21:07:56 | null | MEMBER | [] | null | null | null | null | ### Describe the bug
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.
- Th... | {
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https://api.github.com/repos/huggingface/datasets/issues/8128 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8128/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8128/comments | https://api.github.com/repos/huggingface/datasets/issues/8128/events | https://github.com/huggingface/datasets/pull/8128 | 4,240,118,144 | PR_kwDODunzps7RfgVx | 8,128 | Don't include files list DatasetInfo (and remove old stuff) | {
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"The docs for this PR live [here](https://moon-ci-docs.huggingface.co/docs/datasets/pr_8128). All of your documentation changes will be reflected on that endpoint. The docs are available until 30 days after the last update."
] | 2026-04-10T15:30:24 | 2026-04-16T09:23:48 | 2026-04-16T09:23:45 | null | MEMBER | [] | null | null | false | {
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"merged_at": "2026-04-16T09:23... | this will fix the viewer when it saves the dataset info in mongo, for datasets with a lot of files this can make the mongo doc too big for mongo
I also removed old deprecated stuff linked to files list like the old concept of "post-processing" and cleaned the checksum recording logic | {
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https://api.github.com/repos/huggingface/datasets/issues/8127 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8127/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8127/comments | https://api.github.com/repos/huggingface/datasets/issues/8127/events | https://github.com/huggingface/datasets/pull/8127 | 4,225,755,698 | PR_kwDODunzps7Q23En | 8,127 | Support explicit harness field in agent traces | {
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"For a concrete example, [https://huggingface.co/datasets/jedisct1/agent-traces-swival](https://huggingface.co/datasets/jedisct1/agent-traces-swival) currently shows `claude_code` because it shares field names with Claude Code, despite an explicit `harness` field identifying the harness as not Claude Code.\r\n",
... | 2026-04-08T15:39:48 | 2026-04-23T16:47:46 | 2026-04-23T16:47:46 | null | NONE | [] | null | null | false | {
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} | Hi!
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.) | {
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https://api.github.com/repos/huggingface/datasets/issues/8126 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8126/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8126/comments | https://api.github.com/repos/huggingface/datasets/issues/8126/events | https://github.com/huggingface/datasets/pull/8126 | 4,224,718,927 | PR_kwDODunzps7Qz_UY | 8,126 | Fix batching for table-formatted datasets | {
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"The docs for this PR live [here](https://moon-ci-docs.huggingface.co/docs/datasets/pr_8126). All of your documentation changes will be reflected on that endpoint. The docs are available until 30 days after the last update."
] | 2026-04-08T13:05:36 | 2026-04-10T13:14:01 | 2026-04-10T13:14:00 | null | CONTRIBUTOR | [] | null | null | false | {
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"merged_at": "2026-04-10T13:14... | ## Summary
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-style ... | {
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https://api.github.com/repos/huggingface/datasets/issues/8125 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8125/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8125/comments | https://api.github.com/repos/huggingface/datasets/issues/8125/events | https://github.com/huggingface/datasets/issues/8125 | 4,223,104,906 | I_kwDODunzps77t3eK | 8,125 | Feature request: being able to disable chmod for flat permission filesystems | {
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"Context: the operation fails on GCS FUSE mounts, and likely will on similar s3-backed file systems.\n\n File \"/home/user/.venv/lib/python3.12/site-packages/datasets/arrow_dataset.py\", line 3747, in _map_single ... | 2026-04-08T08:17:14 | 2026-04-08T08:22:42 | null | null | NONE | [] | null | null | null | null | ### Feature request
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 comment... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/8122 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8122/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8122/comments | https://api.github.com/repos/huggingface/datasets/issues/8122/events | https://github.com/huggingface/datasets/pull/8122 | 4,206,043,598 | PR_kwDODunzps7P_9lo | 8,122 | fix: decode Json() values before calling DataFrame.to_json() (#8116) | {
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"Just committed the fix, please let me know if there are any other issues",
"Thanks for the quick fix!",
"The docs for this PR live [here](https://moon-ci-docs.huggingface.co/docs/datasets/pr_8122). All of your documentation changes will be reflected on that endpoint. The docs are available until 30 days after ... | 2026-04-04T23:54:37 | 2026-04-10T13:12:48 | 2026-04-10T13:12:48 | null | CONTRIBUTOR | [] | null | null | false | {
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"merged_at": "2026-04-10T13:12... | # Summary
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 their... | {
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https://api.github.com/repos/huggingface/datasets/issues/8121 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8121/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8121/comments | https://api.github.com/repos/huggingface/datasets/issues/8121/events | https://github.com/huggingface/datasets/pull/8121 | 4,204,840,969 | PR_kwDODunzps7P9H7w | 8,121 | Fix Audio.cast_storage for CSV-loaded large_string columns | {
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"Thanks for the investigation and the fix ! This makes me think that maybe load_dataset(\"csv\") should return \"string\" types instead of \"large_string\" to be consistent with load_dataset(\"json\") as well as the Dataset.from_xxx methods",
"The docs for this PR live [here](https://moon-ci-docs.huggingface.co/d... | 2026-04-04T12:44:03 | 2026-04-10T21:29:05 | null | null | NONE | [] | null | null | false | {
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} | ## Summary
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_string` ... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/8120 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8120/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8120/comments | https://api.github.com/repos/huggingface/datasets/issues/8120/events | https://github.com/huggingface/datasets/issues/8120 | 4,201,197,701 | I_kwDODunzps76aTCF | 8,120 | Patch fields truncated — missing trailing newlines | {
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"Hi, I'd like to work on this issue. I'll try to reproduce this issue and see where the newline is being stripped.",
"Hi @hetao-git\n\nI was able to reproduce this issue, I used the instance \"atlanhq_atlan-python_pr37\" from the AweAI-Team/Scale-SWE dataset. I observed that applying the GitHub patch (pull/37.dif... | 2026-04-03T16:07:47 | 2026-04-22T12:36:28 | null | null | NONE | [] | null | null | null | null | Description: Multiple entries in the dataset have patches (test.patch and fix.patch) and f2p_patch fields with truncated content. The trailing blank lines that are part of valid unified diff format are stripped, causing git apply to fail with "corrupt patch" errors.
Affected instances (confirmed): atlanhq_atlan-python... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/8116 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8116/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8116/comments | https://api.github.com/repos/huggingface/datasets/issues/8116/events | https://github.com/huggingface/datasets/issues/8116 | 4,197,189,620 | I_kwDODunzps76LAf0 | 8,116 | `to_json()` serializes `Json()` feature as escaped string instead of native JSON object | {
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"Hi! I ran into this issue as well, I think the root cause was that under `_batch_json()` of `JsonDatasetWriter` it was directly exporting the encoded string without decoding it first. I will try to add a PR with a small fix. ",
"#self-assign"
] | 2026-04-02T21:59:15 | 2026-04-10T13:12:51 | 2026-04-10T13:12:51 | null | CONTRIBUTOR | [] | null | null | null | null | ### Describe the bug
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 with ... | {
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https://api.github.com/repos/huggingface/datasets/issues/8115 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8115/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8115/comments | https://api.github.com/repos/huggingface/datasets/issues/8115/events | https://github.com/huggingface/datasets/pull/8115 | 4,195,114,404 | PR_kwDODunzps7PldtS | 8,115 | fix: preserve features in IterableDataset.add_column (fixes #5752) | {
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"The docs for this PR live [here](https://moon-ci-docs.huggingface.co/docs/datasets/pr_8115). All of your documentation changes will be reflected on that endpoint. The docs are available until 30 days after the last update."
] | 2026-04-02T14:48:19 | 2026-04-07T14:19:35 | null | null | NONE | [] | null | null | false | {
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} | ## Summary
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** (`ite... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/8114 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8114/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8114/comments | https://api.github.com/repos/huggingface/datasets/issues/8114/events | https://github.com/huggingface/datasets/pull/8114 | 4,193,245,944 | PR_kwDODunzps7PgMNx | 8,114 | 🔒 Pin GitHub Actions to commit SHAs | {
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"The docs for this PR live [here](https://moon-ci-docs.huggingface.co/docs/datasets/pr_8114). All of your documentation changes will be reflected on that endpoint. The docs are available until 30 days after the last update."
] | 2026-04-02T09:28:58 | 2026-04-07T14:11:33 | 2026-04-07T14:11:31 | null | CONTRIBUTOR | [] | null | null | false | {
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"merged_at": "2026-04-07T14:11... | ## 🔒 Pin GitHub Actions to commit SHAs
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 | SHA ... | {
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https://api.github.com/repos/huggingface/datasets/issues/8113 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8113/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8113/comments | https://api.github.com/repos/huggingface/datasets/issues/8113/events | https://github.com/huggingface/datasets/pull/8113 | 4,188,441,968 | PR_kwDODunzps7PUfD_ | 8,113 | Parse agent traces | {
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"The docs for this PR live [here](https://moon-ci-docs.huggingface.co/docs/datasets/pr_8113). All of your documentation changes will be reflected on that endpoint. The docs are available until 30 days after the last update."
] | 2026-04-01T16:56:08 | 2026-04-23T16:47:45 | 2026-04-23T16:47:43 | null | MEMBER | [] | null | null | false | {
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"merged_at": "2026-04-23T16:47... | Supports claude_code, codex and pi
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_id": da... | {
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https://api.github.com/repos/huggingface/datasets/issues/8112 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8112/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8112/comments | https://api.github.com/repos/huggingface/datasets/issues/8112/events | https://github.com/huggingface/datasets/pull/8112 | 4,185,517,824 | PR_kwDODunzps7PMvUa | 8,112 | fix: replace List with Sequence in type hints for public API functions (#5354) | {
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"Updated — public Dataset.map(), Dataset.filter(), IterableDataset.map() and IterableDataset.filter() signatures now also use Sequence[str] consistently. Thanks for the pointer.",
"Note: PR #8067 by @biefan also addresses path_or_paths in arrow_dataset.py. This PR covers a broader scope across 4 files and additio... | 2026-04-01T09:31:28 | 2026-04-02T06:47:20 | null | null | NONE | [] | null | null | false | {
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} | ## Summary
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.
## Changes
... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/8111 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8111/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8111/comments | https://api.github.com/repos/huggingface/datasets/issues/8111/events | https://github.com/huggingface/datasets/pull/8111 | 4,180,579,790 | PR_kwDODunzps7PAKZk | 8,111 | add sample_by="document" support for jsonl files | {
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"The docs for this PR live [here](https://moon-ci-docs.huggingface.co/docs/datasets/pr_8111). All of your documentation changes will be reflected on that endpoint. The docs are available until 30 days after the last update.",
"would the auto-detection of agent harness (claude vs. codex vs. opencode etc) and other... | 2026-03-31T16:23:57 | 2026-04-01T16:57:00 | 2026-04-01T16:56:59 | null | CONTRIBUTOR | [] | null | null | false | {
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} | With more agentic traces (_ie Claude Code / Codex / Pi etc_) being published to the Hub as JSONL files, it would be nice to easily support loading / viewing them in Dataset Viewer.
Datasets like https://huggingface.co/datasets/cfahlgren1/agent-sessions contain one JSONL file per session. Without sample_by, each lin... | {
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https://api.github.com/repos/huggingface/datasets/issues/8110 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8110/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8110/comments | https://api.github.com/repos/huggingface/datasets/issues/8110/events | https://github.com/huggingface/datasets/issues/8110 | 4,176,918,326 | I_kwDODunzps749rc2 | 8,110 | `set_format` resets features | {
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"couldn't replicate with: \n\n``` bash\nPlatform: macos\npython: 3.10.9\ndatasets: 4.8.4\nhuggingface_hub: 0.36.2\npyarrow: 23.0.1\npandas: 2.3.3\nfsspec: 2026.2.0\n\n```\n\n\n``` python\nimport datasets\nfrom datasets import Array2D, Dataset\nimport numpy as np\n\n# Create a dataset with Array2D feature\ndata = {\... | 2026-03-31T07:59:32 | 2026-04-06T03:16:19 | null | null | NONE | [] | null | null | null | null | ### Describe the bug
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.features
... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/8109 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8109/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8109/comments | https://api.github.com/repos/huggingface/datasets/issues/8109/events | https://github.com/huggingface/datasets/pull/8109 | 4,170,661,589 | PR_kwDODunzps7Onjr6 | 8,109 | docs: fix typos, grammar, and branding consistency across docs and source | {
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} | This commit addresses several documentation quality issues found across the repository — fixing typos, grammar errors, brand name inconsistencies, and adding modern tooling references for new contributors.
## Changes
### README.md
- Fix duplicate word: "frameworks frameworks" → "frameworks"
- Standardize brand ... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/8107 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8107/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8107/comments | https://api.github.com/repos/huggingface/datasets/issues/8107/events | https://github.com/huggingface/datasets/pull/8107 | 4,146,270,390 | PR_kwDODunzps7N0KQH | 8,107 | Update WebDataset documentation link | {
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Closes #7699 | null | {
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https://api.github.com/repos/huggingface/datasets/issues/8106 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8106/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8106/comments | https://api.github.com/repos/huggingface/datasets/issues/8106/events | https://github.com/huggingface/datasets/pull/8106 | 4,141,989,496 | PR_kwDODunzps7Nowf0 | 8,106 | Fix: Add validation to prevent duplicate kwargs in load_dataset_builder | {
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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` spec... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/8089 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8089/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8089/comments | https://api.github.com/repos/huggingface/datasets/issues/8089/events | https://github.com/huggingface/datasets/pull/8089 | 4,121,294,778 | PR_kwDODunzps7Ms4gk | 8,089 | set dev version | {
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https://api.github.com/repos/huggingface/datasets/issues/8088 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8088/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8088/comments | https://api.github.com/repos/huggingface/datasets/issues/8088/events | https://github.com/huggingface/datasets/pull/8088 | 4,121,279,812 | PR_kwDODunzps7Ms1yp | 8,088 | release: 4.8.4 | {
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https://api.github.com/repos/huggingface/datasets/issues/8087 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8087/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8087/comments | https://api.github.com/repos/huggingface/datasets/issues/8087/events | https://github.com/huggingface/datasets/pull/8087 | 4,121,072,822 | PR_kwDODunzps7MsQdY | 8,087 | Support latest torchvision | {
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https://api.github.com/repos/huggingface/datasets/issues/8086 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8086/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8086/comments | https://api.github.com/repos/huggingface/datasets/issues/8086/events | https://github.com/huggingface/datasets/pull/8086 | 4,120,969,434 | PR_kwDODunzps7Mr_MP | 8,086 | fix regression when loading JSON with one file = one object | {
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"The docs for this PR live [here](https://moon-ci-docs.huggingface.co/docs/datasets/pr_8086). All of your documentation changes will be reflected on that endpoint. The docs are available until 30 days after the last update."
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https://api.github.com/repos/huggingface/datasets/issues/8085 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8085/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8085/comments | https://api.github.com/repos/huggingface/datasets/issues/8085/events | https://github.com/huggingface/datasets/issues/8085 | 4,120,101,624 | I_kwDODunzps71k8L4 | 8,085 | ImportError: cannot import name 'VideoReader' from 'torchvision.io' when using datasets with torch format | {
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"`datasets` 4.8.4 is out and includes a fix :)"
] | 2026-03-23T11:16:20 | 2026-03-23T14:23:25 | 2026-03-23T14:00:57 | null | NONE | [] | null | null | null | null | ### Describe the bug
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**:
> ... | {
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https://api.github.com/repos/huggingface/datasets/issues/8084 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8084/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8084/comments | https://api.github.com/repos/huggingface/datasets/issues/8084/events | https://github.com/huggingface/datasets/pull/8084 | 4,113,045,931 | PR_kwDODunzps7MYMNy | 8,084 | Add reshard support for JSON Lines and CSV file formats | {
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"@lhoestq , hi, lhoestq, could you please help review this PR? Thanks!",
"The docs for this PR live [here](https://moon-ci-docs.huggingface.co/docs/datasets/pr_8084). All of your documentation changes will be reflected on that endpoint. The docs are available until 30 days after the last update.",
"> Cool ! I l... | 2026-03-21T16:56:42 | 2026-04-07T13:04:17 | null | null | NONE | [] | null | null | false | {
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} | This PR extends the IterableDataset.reshard() functionality to support JSON Lines and CSV file formats, building on the foundation laid in #7992.
### Summary
- JSON Lines : Resharding splits files by line boundaries (only when num_shards is specified)
- CSV : Resharding splits files by line boundaries (only when n... | null | {
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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 | {
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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 revised t... | {
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https://api.github.com/repos/huggingface/datasets/issues/8079 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8079/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8079/comments | https://api.github.com/repos/huggingface/datasets/issues/8079/events | https://github.com/huggingface/datasets/issues/8079 | 4,099,246,270 | I_kwDODunzps70VYi- | 8,079 | StepExamplesIterable._iter_arrow drops samples for non-zero ranks for single-sharded | {
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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_node w... | {
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"I also have been stuck in same problem ",
"This should be fixed, thanks for reporting ! let us know if you ever encounter other issues in the future",
"It's okay. \n\nGood job, thanks your support! "
] | 2026-03-17T06:44:01 | 2026-03-30T04:14:29 | 2026-03-30T04:14:29 | null | NONE | [] | null | null | null | null | ### Describe the bug
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_chung_T... | {
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"Hi ! Good catch :) Since table-formatted iterable datasets have an Arrow path (i.e. they have `.iter_arrow()`) I guess a simple fix would be to make `.batch()` make the dataset arrow-formatted and use a `batch_arrow_fn` in that case (instead of the current `_batch_fn` that expects dictionaries). It would also be b... | 2026-03-17T01:08:13 | 2026-04-10T13:14:03 | 2026-04-10T13:14:03 | null | COLLABORATOR | [] | null | null | null | null | The `.batch()` method currently assumes the input (batch) is always a dictionary, which causes errors when it isn't. This can happen with formatted datasets, since formats like `"pyarrow"`, `"pandas"` (only affects `IterableDataset`), and `"polars"` return tables/dataframes instead of dictionaries.
For example:
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"The docs for this PR live [here](https://moon-ci-docs.huggingface.co/docs/datasets/pr_8074). All of your documentation changes will be reflected on that endpoint. The docs are available until 30 days after the last update."
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related: https://github.com/apache/arrow/issues/9886 | {
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https://api.github.com/repos/huggingface/datasets/issues/8070 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8070/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8070/comments | https://api.github.com/repos/huggingface/datasets/issues/8070/events | https://github.com/huggingface/datasets/pull/8070 | 4,085,368,828 | PR_kwDODunzps7LEYUB | 8,070 | Release: 4.8.0 | {
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https://api.github.com/repos/huggingface/datasets/issues/8068 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8068/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8068/comments | https://api.github.com/repos/huggingface/datasets/issues/8068/events | https://github.com/huggingface/datasets/pull/8068 | 4,079,149,641 | PR_kwDODunzps7Kwbp4 | 8,068 | Datasets streaming iterable packaged fixes | {
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"Fixing soon :)",
"Amazing PR ! I took the liberty of pushing a few fixes to account f... | 2026-03-15T20:37:55 | 2026-03-17T17:33:57 | 2026-03-16T22:54:07 | null | CONTRIBUTOR | [] | null | null | false | {
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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 partially wire... | {
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} | ## Summary
- 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 static t... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/8066 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8066/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8066/comments | https://api.github.com/repos/huggingface/datasets/issues/8066/events | https://github.com/huggingface/datasets/pull/8066 | 4,076,658,501 | PR_kwDODunzps7KpFze | 8,066 | fix: avoid duplicate kwargs collisions in load_dataset_builder | {
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"I believe this was fixed in https://github.com/huggingface/datasets/pull/8068"
] | 2026-03-14T20:26:16 | 2026-03-17T00:04:08 | 2026-03-17T00:04:07 | null | NONE | [] | null | null | false | {
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} | ## Summary
- 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 overridi... | {
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https://api.github.com/repos/huggingface/datasets/issues/8065 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8065/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8065/comments | https://api.github.com/repos/huggingface/datasets/issues/8065/events | https://github.com/huggingface/datasets/issues/8065 | 4,073,606,584 | I_kwDODunzps7yzk24 | 8,065 | ARM audio support broken | {
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"See also https://github.com/NVIDIA/garak/issues/1622#issuecomment-3937720381",
"Hi @leondz , thanks for the detailed bug report — the description and reproduction steps are really clear.\n\nI’d love to take a shot at investigating and potentially fixing this issue. Before I start digging into the codebase, I jus... | 2026-03-13T22:06:36 | 2026-03-23T14:16:47 | null | null | CONTRIBUTOR | [] | null | null | null | null | ### Describe the bug
`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 platforms... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/8064 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8064/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8064/comments | https://api.github.com/repos/huggingface/datasets/issues/8064/events | https://github.com/huggingface/datasets/pull/8064 | 4,064,944,679 | PR_kwDODunzps7KDQH- | 8,064 | Read (and write) from HF Storage Buckets: load raw data, process and save to Dataset Repos | {
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"The docs for this PR live [here](https://moon-ci-docs.huggingface.co/docs/datasets/pr_8064). All of your documentation changes will be reflected on that endpoint. The docs are available until 30 days after the last update."
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"merged_at": "2026-03-16T15:45... | TODO:
- [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] IterableD... | {
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https://api.github.com/repos/huggingface/datasets/issues/8063 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8063/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8063/comments | https://api.github.com/repos/huggingface/datasets/issues/8063/events | https://github.com/huggingface/datasets/pull/8063 | 4,064,033,042 | PR_kwDODunzps7KAPNO | 8,063 | Fix formatted iter arrow double yield | {
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"The docs for this PR live [here](https://moon-ci-docs.huggingface.co/docs/datasets/pr_8063). All of your documentation changes will be reflected on that endpoint. The docs are available until 30 days after the last update."
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"merged_at": "2026-03-17T00:06... | I (+Claude) noticed this when reading the code. I did not encounter this bug (I think) so I can't say much more about it. Perhaps the second iteration will immediately stop so the bug is harmless, but to be safe I think a return there is safer. | {
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https://api.github.com/repos/huggingface/datasets/issues/8062 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8062/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8062/comments | https://api.github.com/repos/huggingface/datasets/issues/8062/events | https://github.com/huggingface/datasets/pull/8062 | 4,064,013,989 | PR_kwDODunzps7KALNc | 8,062 | Fix iterable dataset dict num proc shards | {
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"I believe this was fixed in https://github.com/huggingface/datasets/pull/8068"
] | 2026-03-12T11:34:02 | 2026-03-17T00:10:20 | 2026-03-17T00:10:19 | null | CONTRIBUTOR | [] | null | null | false | {
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} | If the number of shards for some split is lower than num_proc the IterableDatasetDict.push_to_hub will crash.
This handling of num_proc is as close to identical as the handling in IterableDataset.push_to_hub | {
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https://api.github.com/repos/huggingface/datasets/issues/8061 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8061/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8061/comments | https://api.github.com/repos/huggingface/datasets/issues/8061/events | https://github.com/huggingface/datasets/pull/8061 | 4,058,881,349 | PR_kwDODunzps7JvjMu | 8,061 | fix reshard_data_sources | {
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https://api.github.com/repos/huggingface/datasets/issues/8060 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8060/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8060/comments | https://api.github.com/repos/huggingface/datasets/issues/8060/events | https://github.com/huggingface/datasets/pull/8060 | 4,058,653,460 | PR_kwDODunzps7Juyj9 | 8,060 | Improve error message for invalid data_files pattern format | {
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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>}
This helps users debug incorrect dataset configurations more easily. | {
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https://api.github.com/repos/huggingface/datasets/issues/8059 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8059/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8059/comments | https://api.github.com/repos/huggingface/datasets/issues/8059/events | https://github.com/huggingface/datasets/pull/8059 | 4,047,389,910 | PR_kwDODunzps7JKln6 | 8,059 | set dev version | {
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https://api.github.com/repos/huggingface/datasets/issues/8057 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8057/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8057/comments | https://api.github.com/repos/huggingface/datasets/issues/8057/events | https://github.com/huggingface/datasets/pull/8057 | 4,047,214,377 | PR_kwDODunzps7JKAxA | 8,057 | Limit dataset listing to first 20 entries in readme | {
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"The docs for this PR live [here](https://moon-ci-docs.huggingface.co/docs/datasets/pr_8057). All of your documentation changes will be reflected on that endpoint. The docs are available until 30 days after the last update."
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https://api.github.com/repos/huggingface/datasets/issues/8056 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8056/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8056/comments | https://api.github.com/repos/huggingface/datasets/issues/8056/events | https://github.com/huggingface/datasets/pull/8056 | 4,046,814,417 | PR_kwDODunzps7JIr7d | 8,056 | Don't extract bad files | {
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https://api.github.com/repos/huggingface/datasets/issues/8055 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8055/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8055/comments | https://api.github.com/repos/huggingface/datasets/issues/8055/events | https://github.com/huggingface/datasets/pull/8055 | 4,042,507,479 | PR_kwDODunzps7I6knM | 8,055 | feat: add 3D mesh support and MeshFolder builder | {
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"### A Test Conducted:\r\n\r\n```python\r\nfrom datasets import Features, Value, Sequence, Image, Audio, Mesh, load_dataset\r\n\r\n# Define features.\r\nfeatures = Features({\r\n 'id': Value('string'),\r\n 'objaverse_uid': Value('string'),\r\n 'text': Value('string'),\r\n 'image': Image(),\r\n 'audio... | 2026-03-09T00:03:16 | 2026-04-29T15:23:33 | null | null | NONE | [] | null | null | false | {
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} | This PR introduces 3D mesh support to the `datasets` library, mirroring the existing paradigms for Image, Audio, and Video modalities. this is made to support 3D data just like image, audio, etc...
new `Mesh`feature class, which manages 3D data via a PyArrow `struct` containing both raw bytes and file paths. support... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/8054 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8054/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8054/comments | https://api.github.com/repos/huggingface/datasets/issues/8054/events | https://github.com/huggingface/datasets/pull/8054 | 4,042,146,910 | PR_kwDODunzps7I5elG | 8,054 | fix(arrow_dataset): initialise writer on first non-None map result, not on i==0 | {
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} | ## Summary
`Dataset.map` crashes with `AttributeError: 'NoneType' object has no attribute 'write'` when the map function returns `None` for the first N examples and a dict for later ones (issue #7990).
## Root Cause
The `ArrowWriter` was initialised with a guard tied to the example index:
```python
# Non-batched pa... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/8053 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8053/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8053/comments | https://api.github.com/repos/huggingface/datasets/issues/8053/events | https://github.com/huggingface/datasets/pull/8053 | 4,042,143,431 | PR_kwDODunzps7I5d8p | 8,053 | fix(iterable_dataset): preserve features when chaining filter() on typed IterableDataset | {
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"The docs for this PR live [here](https://moon-ci-docs.huggingface.co/docs/datasets/pr_8053). All of your documentation changes will be reflected on that endpoint. The docs are available until 30 days after the last update."
] | 2026-03-08T20:46:50 | 2026-03-09T17:44:33 | 2026-03-09T17:44:33 | null | CONTRIBUTOR | [] | null | null | false | {
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"merged_at": "2026-03-09T17:44... | ## Summary
Chaining two `.filter()` calls on an `IterableDataset` with explicit features raises:
```
TypeError: 'NoneType' object is not a mapping
```
on the second `.filter()` call (issue #8037).
## Root Cause
After the first `.filter()`, the internal `ex_iterable` becomes _typed_ (`is_typed=True`) because `Filte... | {
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https://api.github.com/repos/huggingface/datasets/issues/8052 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8052/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8052/comments | https://api.github.com/repos/huggingface/datasets/issues/8052/events | https://github.com/huggingface/datasets/issues/8052 | 4,041,972,911 | I_kwDODunzps7w65yv | 8,052 | [Security] Zip/Rar/7z Archive Extraction Path Traversal (Incomplete CVE-2007-4559 Mitigation) | {
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"Hi! I'm currently exploring the codebase and came across this issue. I'd be interested in investigating it further and trying to reproduce the behavior locally.\n\nIf no one is actively working on it, I'd be happy to take a look and attempt a fix.\n",
"The steps to reproduce don't cause any file extraction outsi... | 2026-03-08T19:09:32 | 2026-03-10T23:27:45 | 2026-03-10T23:27:45 | null | NONE | [] | null | null | null | null | ## Security Vulnerability Report
**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` call... | {
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https://api.github.com/repos/huggingface/datasets/issues/8051 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8051/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8051/comments | https://api.github.com/repos/huggingface/datasets/issues/8051/events | https://github.com/huggingface/datasets/pull/8051 | 4,038,763,775 | PR_kwDODunzps7Iu5aG | 8,051 | Add dtype property to Sequence, List, and LargeList (Fixes #8002) | {
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https://api.github.com/repos/huggingface/datasets/issues/8050 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8050/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8050/comments | https://api.github.com/repos/huggingface/datasets/issues/8050/events | https://github.com/huggingface/datasets/pull/8050 | 4,038,690,293 | PR_kwDODunzps7IurXm | 8,050 | Fix IterableDataset features being set to None on chained filter (Fixes #8037) | {
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"Thanks for the PR ! The original issue poster actually opened the same PR https://github.com/huggingface/datasets/pull/8053 but with additional tests, so I took the liberty of merging theirs - I hope you don't mind"
] | 2026-03-07T15:14:07 | 2026-03-09T17:45:32 | 2026-03-09T17:45:31 | null | NONE | [] | null | null | false | {
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} | This PR implements the solution suggested in #8037.
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. | {
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https://api.github.com/repos/huggingface/datasets/issues/8049 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8049/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8049/comments | https://api.github.com/repos/huggingface/datasets/issues/8049/events | https://github.com/huggingface/datasets/pull/8049 | 4,032,135,159 | PR_kwDODunzps7IZR_m | 8,049 | Fix typos in iterable_dataset.py | {
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https://api.github.com/repos/huggingface/datasets/issues/8048 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8048/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8048/comments | https://api.github.com/repos/huggingface/datasets/issues/8048/events | https://github.com/huggingface/datasets/issues/8048 | 4,031,613,102 | I_kwDODunzps7wTYiu | 8,048 | Support 3D Datasets | {
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] | open | false | [] | null | [] | 2026-03-06T01:23:08 | 2026-03-09T00:05:03 | null | null | NONE | [] | null | null | null | null | ### Feature request
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.co/do... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/8047 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8047/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8047/comments | https://api.github.com/repos/huggingface/datasets/issues/8047/events | https://github.com/huggingface/datasets/pull/8047 | 4,030,434,134 | PR_kwDODunzps7IUKWg | 8,047 | fix: handle nested null types in feature alignment for multi-proc map | {
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"The docs for this PR live [here](https://moon-ci-docs.huggingface.co/docs/datasets/pr_8047). All of your documentation changes will be reflected on that endpoint. The docs are available until 30 days after the last update."
] | 2026-03-05T20:28:50 | 2026-03-09T17:52:12 | 2026-03-09T17:52:12 | null | CONTRIBUTOR | [] | null | null | false | {
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"merged_at": "2026-03-09T17:52... | When using `Dataset.map()` with `num_proc > 1`, shards containing only empty lists get their features inferred as `List(Value('null'))`, which is incompatible with `List(Struct({...}))` from shards with actual data.
The existing `_check_if_features_can_be_aligned` and `_align_features` only handled top-level `Value(... | {
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"\n### Root cause\n\nIn `src/datasets/features/features.py`, both `_check_if_features_can_be_aligned` and `_align_features` use:\n\n```python\nisinstance(v, Value) and v.dtype == \"null\"\n```\n\nto check for null compatibility. However, `List(Value('null'))` is **not** an instance of `Value` — it's an instance of ... | 2026-03-05T20:12:13 | 2026-03-09T17:52:13 | 2026-03-09T17:52:13 | null | CONTRIBUTOR | [] | null | null | null | null | ### Describe the bug
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(Value('n... | {
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https://api.github.com/repos/huggingface/datasets/issues/8045 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8045/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8045/comments | https://api.github.com/repos/huggingface/datasets/issues/8045/events | https://github.com/huggingface/datasets/pull/8045 | 4,028,881,818 | PR_kwDODunzps7IPA1N | 8,045 | Write IterableDataset to parquet incrementally instead of materializing entire shard in memory | {
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"I've tested this change along with the changes from my other PRs (https://github.com/HaukurPall/datasets/tree/all-fixes) and this change **dramatically** reduces the memory requirement per process.\r\n\r\nContext:\r\n\r\nI'm working with audio datasets, the audio is embedded in the parquet. When loading a 1GB shar... | 2026-03-05T15:13:53 | 2026-03-11T12:30:57 | null | null | CONTRIBUTOR | [] | null | null | false | {
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} | `IterableDataset.to_parquet()` materialized the entire shard into memory via
`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 batches a... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/8044 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8044/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8044/comments | https://api.github.com/repos/huggingface/datasets/issues/8044/events | https://github.com/huggingface/datasets/pull/8044 | 4,028,042,275 | PR_kwDODunzps7IMNl4 | 8,044 | Fix silent data loss in push_to_hub when num_proc > num_shards | {
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"merged_at": "2026-03-09T17:22... | ## Summary
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 `_push_pa... | {
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https://api.github.com/repos/huggingface/datasets/issues/8043 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8043/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8043/comments | https://api.github.com/repos/huggingface/datasets/issues/8043/events | https://github.com/huggingface/datasets/pull/8043 | 4,027,936,170 | PR_kwDODunzps7IL3IJ | 8,043 | Add features parameter to IterableDatasetDict.map | {
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"I'm going to close this PR as it depends on correct `features` handling in `IterableDataset`, which is not done correctly at the moment."
] | 2026-03-05T12:30:46 | 2026-03-12T11:42:22 | 2026-03-12T11:42:21 | null | CONTRIBUTOR | [] | null | null | false | {
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} | IterableDataset.map accepts a features parameter to declare the output schema, but IterableDatasetDict.map did not expose it. This meant users of IterableDatasetDict had no way to preserve feature metadata through map operations. | {
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https://api.github.com/repos/huggingface/datasets/issues/8042 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8042/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8042/comments | https://api.github.com/repos/huggingface/datasets/issues/8042/events | https://github.com/huggingface/datasets/pull/8042 | 4,027,903,841 | PR_kwDODunzps7ILwT5 | 8,042 | Fix schema enforcement in streaming _convert_to_arrow | {
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"I'm going to close this PR as I have a more complete branch which fixes feature handling in the streaming case. The `features` handling in the streaming case is btw completely broken at the moment, it just happens to work in some cases. I will add more test cases to show it in a later PR."
] | 2026-03-05T12:23:47 | 2026-03-12T11:40:32 | 2026-03-12T11:40:31 | null | CONTRIBUTOR | [] | null | null | false | {
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} | When the iter_arrow chain is broken (e.g. after .map() without with_format("arrow")), _convert_to_arrow falls back to pa.Table.from_pylist() which infers types from values. If early batches contain None or empty lists, Arrow infers null/list<null> types that conflict with later batches containing real data, causing Arr... | {
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https://api.github.com/repos/huggingface/datasets/issues/8041 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8041/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8041/comments | https://api.github.com/repos/huggingface/datasets/issues/8041/events | https://github.com/huggingface/datasets/pull/8041 | 4,027,152,089 | PR_kwDODunzps7IJPKo | 8,041 | Use num_examples instead of len(self) for iterable_dataset's SplitInfo | {
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