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2026-04-03 16:07:47
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https://api.github.com/repos/huggingface/datasets/issues/8120
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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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2026-04-03T16:07:47
2026-04-03T16:08:35
null
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NONE
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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...
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https://api.github.com/repos/huggingface/datasets/issues/8116
https://api.github.com/repos/huggingface/datasets
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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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2026-04-02T21:59:15
2026-04-04T23:42:25
null
null
CONTRIBUTOR
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### 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 ...
null
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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" ]
https://api.github.com/repos/huggingface/datasets/issues/8110
https://api.github.com/repos/huggingface/datasets
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https://github.com/huggingface/datasets/issues/8110
4,176,918,326
I_kwDODunzps749rc2
8,110
`set_format` resets features
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2026-03-31T07:59:32
2026-04-06T03:16:19
null
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NONE
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### 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 ...
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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 = {\...
https://api.github.com/repos/huggingface/datasets/issues/8085
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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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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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[ "`datasets` 4.8.4 is out and includes a fix :)" ]
https://api.github.com/repos/huggingface/datasets/issues/8079
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4,099,246,270
I_kwDODunzps70VYi-
8,079
StepExamplesIterable._iter_arrow drops samples for non-zero ranks for single-sharded
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2026-03-19T04:38:51
2026-03-19T17:29:40
2026-03-19T17:29:40
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NONE
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### Describe the bug 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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https://api.github.com/repos/huggingface/datasets/issues/8078
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4,086,560,531
I_kwDODunzps7zk_cT
8,078
Inconsistent loading of LFS-hosted files in Dangindev/viet-cultural-vqa dataset
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2026-03-17T06:44:01
2026-03-30T04:14:29
2026-03-30T04:14:29
null
NONE
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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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[ "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! " ]
https://api.github.com/repos/huggingface/datasets/issues/8075
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4,085,618,908
I_kwDODunzps7zhZjc
8,075
`.batch()` error on formatted datasets
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2026-03-17T01:08:13
2026-03-20T00:23:14
null
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COLLABORATOR
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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: ```pyt...
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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...
https://api.github.com/repos/huggingface/datasets/issues/8065
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4,073,606,584
I_kwDODunzps7yzk24
8,065
ARM audio support broken
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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...
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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...
https://api.github.com/repos/huggingface/datasets/issues/8052
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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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2026-03-08T19:09:32
2026-03-10T23:27:45
2026-03-10T23:27:45
null
NONE
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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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[ "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...
https://api.github.com/repos/huggingface/datasets/issues/8048
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4,031,613,102
I_kwDODunzps7wTYiu
8,048
Support 3D Datasets
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2026-03-06T01:23:08
2026-03-09T00:05:03
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### 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...
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https://api.github.com/repos/huggingface/datasets/issues/8046
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4,030,348,328
I_kwDODunzps7wOjwo
8,046
`Dataset.map()` with `num_proc > 1` fails when some shards produce `List(Value('null'))` (empty lists)
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2026-03-05T20:12:13
2026-03-09T17:52:13
2026-03-09T17:52:13
null
CONTRIBUTOR
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### 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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[ "\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 ...
https://api.github.com/repos/huggingface/datasets/issues/8038
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4,020,184,168
I_kwDODunzps7vnyRo
8,038
Typo in iterable_dataset.py
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2026-03-04T05:37:15
2026-03-09T17:12:54
2026-03-09T17:12:54
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NONE
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### Describe the bug `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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https://api.github.com/repos/huggingface/datasets/issues/8037
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4,008,928,790
I_kwDODunzps7u82YW
8,037
IterableDataset.filter() chaining fails due to features being lost when is_typed=True
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2026-03-02T02:30:24
2026-03-09T17:44:34
2026-03-09T17:44:34
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NONE
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### Describe the bug Chaining multiple .filter() calls on an IterableDataset raises a TypeError: 'NoneType' object is not a mapping on the second .filter() call. In `IterableDataset.filter()`, the internal `ex_iterable` is wrapped with FormattedExamplesIterable: ```python ex_iterable = FormattedExamplesIterable( ...
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4,004,188,523
I_kwDODunzps7uqxFr
8,034
[BUG] load_datasets() cannot use the generated Arrow cache correctly
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2026-02-28T08:11:23
2026-03-04T13:50:08
null
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CONTRIBUTOR
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### Describe the bug The datasets library cannot use the generated Arrow cache correctly, seemingly due to a flaw in the internal hash symbol calculation logic. The following code provides verification. I am trying to locate the specific code position, and if there are further developments, I will update here. ### S...
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[ "PYTHONHASHSEED=1 uv run python -c\n \"\nfrom datasets.load import LocalDatasetModuleFactory\nmod = LocalDatasetModuleFactory('/cache/datasets/imagenet-1k')\ndm = mod.get_module()\nprint('Hash:', dm.hash)\n\"\nResolving data files: 100%|█████████| 294/294 [00:00<00:00, 20584.68it/s]\nResolving data files: 100%|████...
https://api.github.com/repos/huggingface/datasets/issues/8029
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4,001,742,455
I_kwDODunzps7uhb53
8,029
`cache_dir` option in `download_config` in `load_dataset` is not respected
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2026-02-27T16:05:30
2026-02-27T23:34:28
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### Describe the bug Downloaded files still go to `~/.cache/huggingface/hub/` even if I specified `cache_dir` option in `download_config` in `load_dataset`. ### Steps to reproduce the bug Run my freshly written script and found that downloaded files did not go where I want. ```python ''' 下载OpenWebText数据集,允许使用代理 ''' ...
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[ "Actually, I used debugger to step into the code of `datasets`, and found `load_dataset` calls into `cached_path`, where it calls into `hf_hub_download` method for `hf://` links:\nhttps://github.com/huggingface/datasets/blob/6e8eaeed4d202b72eff44ba1a9ec5b7d81d2d3e6/src/datasets/utils/file_utils.py#L182-L195\n\nSome...
https://api.github.com/repos/huggingface/datasets/issues/8015
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3,974,281,900
I_kwDODunzps7s4rqs
8,015
Iterating a streaming dataset correctly in random order
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2026-02-22T11:34:06
2026-03-14T13:22:51
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### Describe the bug For training to work properly it is considered good practice in machine learning to sample the dataset randomly (uniformly). I am not sure how the user is expected to do it correctly when the creator of the dataset did a bad job. https://huggingface.co/docs/hub/datasets-webdataset ``` **Shuffle*...
null
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[ "Hi, reshuffling is actually pretty easy:\n\n```python\n\"\"\" shuffle.py \"\"\"\nfrom datasets import load_dataset\n\nnum_proc = 8 # tweak it here depending on your machine\nseed = 42\nds = load_dataset(\"jackyhate/text-to-image-2M\", num_proc=num_proc)\nds = ds.shuffle(seed=seed)\nds.push_to_hub(\"my-username/te...
https://api.github.com/repos/huggingface/datasets/issues/8012
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3,963,855,875
I_kwDODunzps7sQ6QD
8,012
HC3 dataset fails to load with datasets>=3 due to legacy script (HC3.py)
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2026-02-19T16:27:51
2026-02-20T11:58:20
2026-02-20T11:58:20
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### Describe the bug It looks like the current documentation suggests loading the dataset like this: `load_dataset("Hello-SimpleAI/HC3", split="train") ` But with datasets>=3.x, this raises: RuntimeError: Dataset scripts are no longer supported, but found HC3.py The dataset loads correctly if we specify the parqu...
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[ "This is not a bug. This is intended behaviour. The only ways to resolve this are\n1. use the old `datasets` versions\n2. load the dataset and upload it to your own repo without a script\n3. raise an issue in the dataset and wait for the owner to update it." ]
https://api.github.com/repos/huggingface/datasets/issues/8010
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3,963,448,558
I_kwDODunzps7sPWzu
8,010
audiofolder / folder-based loader rejects metadata.csv when file_name column is inferred as large_string
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2026-02-19T15:06:09
2026-02-19T15:29:41
2026-02-19T15:29:41
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NONE
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### Describe the bug When loading a dataset with load_dataset("audiofolder", data_dir=...) and a metadata.csv (with a file_name column), loading can fail with: `ValueError: file_name or *_file_name must be present as dictionary key (with type string) in metadata files` even when the CSV clearly has a file_name colum...
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[ "Proposing a PR for this [here](https://github.com/huggingface/datasets/pull/8011)\n\nPS: I didn't find a contributing documentation. Please recommend any changes in issue or PR if any. Thank you!" ]
https://api.github.com/repos/huggingface/datasets/issues/8007
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3,946,695,329
I_kwDODunzps7rPcqh
8,007
Add option for loading audio with video
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2026-02-16T09:11:02
2026-03-13T08:42:38
null
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### Describe the bug Currently, `torchcodec` don't allow extracting `Audio` from `Video` https://github.com/meta-pytorch/torchcodec/issues/1158, https://github.com/meta-pytorch/torchcodec/issues/1190, but when I upload videos with audio to hub using `videofolder`, then this is not possible to retrieve audio from it. P...
null
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[ "Hi,\nI’m interested in working on this issue.\n\nFrom what I understand, audio decoding would involve an AudioDecoder, and previous discussions have suggested handling it separately. I’d like to explore whether integrating audio extraction in relation to the current video decoding workflow would be appropriate, or...
https://api.github.com/repos/huggingface/datasets/issues/8006
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3,944,394,074
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8,006
Regression: from_generator crashes if one generator call returns no results
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2026-02-15T16:16:48
2026-02-24T13:58:12
2026-02-24T13:58:12
null
CONTRIBUTOR
null
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### Describe the bug Dataset.from_generator splits any list kwarg to the generator and makes a separate call to the generator for each member of the list even in the num_proc=1 case. I have a generator that processes a number of files, filtering them and producing examples. It used to be the case that things worked fi...
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3,941,908,297
I_kwDODunzps7q9L9J
8,005
Multi-channel audio is automatically cast to mono, num_channels is ignored
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2026-02-14T17:28:03
2026-02-25T15:17:18
null
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NONE
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### Describe the bug The `num_channels` parameter in `datasets.Audio()` is documented to preserve stereo channels when set to `None` (preserve original) or `2` (explicit stereo), but it currently downmixes all audio to mono regardless of this setting. ### Steps to reproduce the bug ```python import numpy as np impor...
null
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[ "**Workaround**\nDirectly load audio using torchcodec, this is what datasets does under the hood (but doesn't maintain multi-channel)\n\n```python\nimport torchcodec\n\ndecoder = torchcodec.decoders.AudioDecoder(audio[\"bytes\"])\naudio_samples = decoder.get_all_samples()\n\naudio = audio_samples.data.numpy()\nsamp...
https://api.github.com/repos/huggingface/datasets/issues/8002
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https://github.com/huggingface/datasets/issues/8002
3,937,013,814
I_kwDODunzps7qqhA2
8,002
The `Sequence` class in features do not have "dtype"
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2026-02-13T12:45:19
2026-02-13T12:52:36
null
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NONE
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### Describe the bug **I'm not sure if this is a bug.** I see that a `FeatureType` object contains an attribute called `self.dtype` that is not covered when this feature is a `Sequence` or a `List`. When I try to run a multilabel classification with this example script from the transformers library: https://github....
null
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https://api.github.com/repos/huggingface/datasets/issues/8120
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4,201,197,701
I_kwDODunzps76aTCF
8,120
Patch fields truncated — missing trailing newlines
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2026-04-03T16:07:47
2026-04-03T16:08:35
null
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NONE
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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
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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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2026-04-02T21:59:15
2026-04-04T23:42:25
null
null
CONTRIBUTOR
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### 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 ...
null
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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" ]
https://api.github.com/repos/huggingface/datasets/issues/8110
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4,176,918,326
I_kwDODunzps749rc2
8,110
`set_format` resets features
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2026-03-31T07:59:32
2026-04-06T03:16:19
null
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NONE
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### 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 ...
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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 = {\...
https://api.github.com/repos/huggingface/datasets/issues/8085
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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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2026-03-23T11:16:20
2026-03-23T14:23:25
2026-03-23T14:00:57
null
NONE
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null
null
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### 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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[ "`datasets` 4.8.4 is out and includes a fix :)" ]
https://api.github.com/repos/huggingface/datasets/issues/8079
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4,099,246,270
I_kwDODunzps70VYi-
8,079
StepExamplesIterable._iter_arrow drops samples for non-zero ranks for single-sharded
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2026-03-19T04:38:51
2026-03-19T17:29:40
2026-03-19T17:29:40
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NONE
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### Describe the bug 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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4,086,560,531
I_kwDODunzps7zk_cT
8,078
Inconsistent loading of LFS-hosted files in Dangindev/viet-cultural-vqa dataset
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2026-03-17T06:44:01
2026-03-30T04:14:29
2026-03-30T04:14:29
null
NONE
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### 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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[ "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! " ]
https://api.github.com/repos/huggingface/datasets/issues/8075
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4,085,618,908
I_kwDODunzps7zhZjc
8,075
`.batch()` error on formatted datasets
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2026-03-17T01:08:13
2026-03-20T00:23:14
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COLLABORATOR
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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: ```pyt...
null
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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...
https://api.github.com/repos/huggingface/datasets/issues/8065
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4,073,606,584
I_kwDODunzps7yzk24
8,065
ARM audio support broken
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2026-03-13T22:06:36
2026-03-23T14:16:47
null
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CONTRIBUTOR
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### 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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[ "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...
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[Security] Zip/Rar/7z Archive Extraction Path Traversal (Incomplete CVE-2007-4559 Mitigation)
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2026-03-08T19:09:32
2026-03-10T23:27:45
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## 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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[ "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...
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Support 3D Datasets
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2026-03-06T01:23:08
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### 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...
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