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https://api.github.com/repos/huggingface/datasets/issues/7992 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7992/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7992/comments | https://api.github.com/repos/huggingface/datasets/issues/7992/events | https://github.com/huggingface/datasets/pull/7992 | 3,897,848,157 | PR_kwDODunzps7BiJps | 7,992 | Add `IterableDataset.reshard()` | {
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"The docs for this PR live [here](https://moon-ci-docs.huggingface.co/docs/datasets/pr_7992). All of your documentation changes will be reflected on that endpoint. The docs are available until 30 days after the last update."
] | 2026-02-04T18:24:41 | 2026-02-04T18:37:50 | 2024-08-21T09:35:06 | MEMBER | null | null | false | {
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} | To increase the number of shards of a dataset, you can use [`IterableDataset.reshard`]:
```py
>>> dataset.reshard()
IterableDataset({
features: ['label', 'title', 'content'],
num_shards: 3600
})
```
The resharding mechanism depends on the dataset file format.
For example for Parquet, it reshards us... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/7991 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7991/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7991/comments | https://api.github.com/repos/huggingface/datasets/issues/7991/events | https://github.com/huggingface/datasets/issues/7991 | 3,896,884,513 | I_kwDODunzps7oRb0h | 7,991 | list(api.list_datasets()) giving jsondecode error | {
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```
from huggingface_hub import HfApi
a... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/7990 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7990/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7990/comments | https://api.github.com/repos/huggingface/datasets/issues/7990/events | https://github.com/huggingface/datasets/issues/7990 | 3,895,870,826 | I_kwDODunzps7oNkVq | 7,990 | Dataset.map crashes when first examples return None and later examples return dict — writer not initialized | {
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I detected a serious [bug from datasets/arrow_dataset.py](https://github.com/huggingface/datasets/blob/main/src/datasets/arrow_dataset.py#L3676)
---
**Description of the bug**
`Dataset.map` crashes with `writer is None` when the map function returns `None` for the first few examples and a diction... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/7989 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7989/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7989/comments | https://api.github.com/repos/huggingface/datasets/issues/7989/events | https://github.com/huggingface/datasets/pull/7989 | 3,895,613,949 | PR_kwDODunzps7BaxDx | 7,989 | Remove pre-release workaround in CI for `transformers v5` and `huggingface_hub v1` | {
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"The docs for this PR live [here](https://moon-ci-docs.huggingface.co/docs/datasets/pr_7989). All of your documentation changes will be reflected on that endpoint. The docs are available until 30 days after the last update."
] | 2026-02-04T09:42:49 | 2026-02-04T15:20:04 | 2026-02-04T15:20:02 | CONTRIBUTOR | null | null | false | {
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"merged_at": "2026-02-04T15:20... | This PR removes workaround for pre-release `transformers v5.*` / `huggingface_hub v1.*` in `test_py314_future` job since they are now officially released.
cc @Wauplin just for viz since you introduced this in https://github.com/huggingface/datasets/pull/7783. | {
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https://api.github.com/repos/huggingface/datasets/issues/7988 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7988/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7988/comments | https://api.github.com/repos/huggingface/datasets/issues/7988/events | https://github.com/huggingface/datasets/issues/7988 | 3,895,353,435 | I_kwDODunzps7oLmBb | 7,988 | `Dataset.map()` breaks when `function` calls `import polars as pl` and `num_proc`>1: "UnboundLocalError: cannot access local variable 'pl' where it is not associated with a value" | {
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# Repro
These two conditions seem to consistently reproduce the issue:
- function passed to `Dataset.map()` explicitly or implicitly calls `import polars as pl`
- `num_proc` > 1
# Trace
```
RemoteTraceback Traceback (most recent call last)
RemoteTraceback:
"""
Traceback... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/7987 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7987/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7987/comments | https://api.github.com/repos/huggingface/datasets/issues/7987/events | https://github.com/huggingface/datasets/pull/7987 | 3,894,713,494 | PR_kwDODunzps7BX0pY | 7,987 | Fix index out of bound error with original_shard_lengths. | {
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} | I have gotten the following error
```
original_shard_lengths[original_shard_id] += 1
~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^
IndexError: list index out of range
```
Not sure what causes it, but this fixes the error. This may not be the proper fix for the root cause though. | null | {
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https://api.github.com/repos/huggingface/datasets/issues/7986 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7986/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7986/comments | https://api.github.com/repos/huggingface/datasets/issues/7986/events | https://github.com/huggingface/datasets/issues/7986 | 3,892,776,651 | I_kwDODunzps7oBw7L | 7,986 | `Dataset.map()` causes cache miss/fingerprint change when closure captures self containing non-deterministic state. | {
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"I suggest metion this in docs specifically for attention with use, tell users to pass arguments with `fn_kwargs` param or using `functools.partial` to create a pure funcion."
] | 2026-02-03T19:16:49 | 2026-02-03T19:20:00 | 2024-08-21T09:35:06 | NONE | null | null | null | null | ### Describe the bug
When using `.map()` with a function defined inside a **class (of which has any non-deterministic states)** method (a closure), if that function captures `self` to access a configuration variable (e.g., self.foo), the fingerprint mechanism serializes the entire class instance state.
If the class i... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/7985 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7985/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7985/comments | https://api.github.com/repos/huggingface/datasets/issues/7985/events | https://github.com/huggingface/datasets/pull/7985 | 3,892,480,150 | PR_kwDODunzps7BQaGn | 7,985 | Remove unused data files optims | {
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"The docs for this PR live [here](https://moon-ci-docs.huggingface.co/docs/datasets/pr_7985). All of your documentation changes will be reflected on that endpoint. The docs are available until 30 days after the last update."
] | 2026-02-03T17:58:30 | 2026-02-03T18:30:30 | 2026-02-03T18:30:28 | MEMBER | null | null | false | {
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"merged_at": "2026-02-03T18:30... | this fixes module inference when there are many metadata files
e.g. the lance dataset at https://huggingface.co/datasets/davanstrien/encyclopaedia-britannica-lance has > 200 metadata files
those optims are not used anymore, they come from a time we were dealing with slow data files iterators instead of lists | {
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} | Add initial Zarr streaming support (POC).
This introduces a `zarr` packaged module and docs/tests to validate basic loading.
Note: I pushed a follow-up commit to fix an accidental duplication in `benchmarks/benchmark_zarr_streaming.py` (file now contains a single benchmark script). | null | {
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} | Fix unstable dataset fingerprinting when hashing `PreTrainedTokenizerFast`.
Some tokenizers backed by `tokenizers.Tokenizer` mutate runtime settings (padding/truncation) when called, which can change the serialized state and make dataset fingerprints unstable. That prevents `.map(load_from_cache_file=True)` from reusi... | null | {
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this is enabled for for datasets loaded using streaming=True/False | {
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} | Fix #4910 : Merge duplicate kwargs in `load_dataset_builder()`
Problem: load_dataset("dataset", base_path="./data")` gives TypeError("multiple values for keyword 'base_path')
Fix: {**builder_kwargs, **config_kwargs} to user kwargs override dataset defaults
Repro : python
Before: TypeError
load_dataset("r... | null | {
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} | Docs: add a minimal `Dataset.from_dict` example.
This helps new users discover the most direct way to build a small dataset from in-memory Python data.
Docs-only change. | null | {
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} | Avoid passing duplicate keyword arguments to `load_dataset_builder`.
Some module factories provide values in `builder_kwargs` (e.g. `base_path`), and users can also pass the same keys via `config_kwargs`, which raises:
`TypeError: ... got multiple values for keyword argument ...`.
Fix: if `config_kwargs` is provided,... | null | {
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Problem: on the local `file://` filesystem, `fsspec` can report symlinks as `type=="other"` and omit the `islink` flag, so symlinked files are skipped.
Fix: when `protocol=="file"`, treat `os.path.islink(filepath)` as a link candidate and include it if it resolves to... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/7972 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7972/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7972/comments | https://api.github.com/repos/huggingface/datasets/issues/7972/events | https://github.com/huggingface/datasets/pull/7972 | 3,874,083,781 | PR_kwDODunzps7AT07I | 7,972 | feat: implement iter_arrow for skip, take and step iterables | {
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} | This commit optimizes streaming operations by implementing [_iter_arrow](cci:1://file:///c:/Users/ASUS/Desktop/datasets/src/datasets/iterable_dataset.py:377:4-391:57) for [SkipExamplesIterable](cci:2://file:///c:/Users/ASUS/Desktop/datasets/src/datasets/iterable_dataset.py:1798:0-1892:42), [TakeExamplesIterable](cci:2:... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/7971 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7971/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7971/comments | https://api.github.com/repos/huggingface/datasets/issues/7971/events | https://github.com/huggingface/datasets/pull/7971 | 3,871,984,311 | PR_kwDODunzps7AMzLl | 7,971 | push_to_hub() for videos | {
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"The docs for this PR live [here](https://moon-ci-docs.huggingface.co/docs/datasets/pr_7971). All of your documentation changes will be reflected on that endpoint. The docs are available until 30 days after the last update."
] | 2026-01-29T18:16:58 | 2026-01-31T11:50:25 | 2026-01-29T18:56:04 | MEMBER | null | null | false | {
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"merged_at": "2026-01-29T18:56... | possible now that row group sizes are auto-determined based on the content size after https://github.com/huggingface/datasets/pull/7589
Videos are uploaded as PLAIN in Parquet to make sure they can be seeked remotely and with random access to frames in https://github.com/huggingface/datasets/pull/7976
In the futu... | {
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https://api.github.com/repos/huggingface/datasets/issues/7970 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7970/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7970/comments | https://api.github.com/repos/huggingface/datasets/issues/7970/events | https://github.com/huggingface/datasets/issues/7970 | 3,869,700,866 | I_kwDODunzps7mpvMC | 7,970 | cast_column(..., Audio) fails with load_dataset("csv",) | {
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"The following code *does* work:\n```py\nfrom datasets import load_dataset,Audio,Features\n\ndataset = load_dataset(\"csv\",data_files=\"audio.csv\",features=Features({\"audio\": Audio()}))\nprint(dataset[\"train\"][0][\"audio\"])\n```",
"Thanks for reporing ! Are you using pandas v3 by any chance ? The CSV loade... | 2026-01-29T09:33:35 | 2026-01-29T22:24:14 | 2024-08-21T09:35:06 | NONE | null | null | null | null | ### Describe the bug
Attempt to load a dataset from a csv with a single `audio` column with a single row with a path to an audio file fails when casting the column to Audio, but the exact same dataset created from a dictionary succeeds.
### Steps to reproduce the bug
1. Have any valid audio file `audio.wav`
2. Have ... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/7969 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7969/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7969/comments | https://api.github.com/repos/huggingface/datasets/issues/7969/events | https://github.com/huggingface/datasets/pull/7969 | 3,865,100,307 | PR_kwDODunzps6_1p9H | 7,969 | Count examples in lance | {
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"The docs for this PR live [here](https://moon-ci-docs.huggingface.co/docs/datasets/pr_7969). All of your documentation changes will be reflected on that endpoint. The docs are available until 30 days after the last update."
] | 2026-01-28T12:00:37 | 2026-01-28T13:00:26 | 2026-01-28T13:00:23 | MEMBER | null | null | false | {
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"merged_at": "2026-01-28T13:00... | ```python
In [1]: from datasets import load_dataset_builder, StreamingDownloadManager
In [2]: b = load_dataset_builder("lance-format/openvid-lance")
Resolving data files: 100%|█| 240/240 [00:00<00:00, 42675.64it/s
In [3]: b.count_examples(StreamingDownloadManager())
Out[3]: {'train': 937957}
``` | {
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https://api.github.com/repos/huggingface/datasets/issues/7968 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7968/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7968/comments | https://api.github.com/repos/huggingface/datasets/issues/7968/events | https://github.com/huggingface/datasets/issues/7968 | 3,864,988,355 | I_kwDODunzps7mXwrD | 7,968 | Potential conflicting type checks and dead code in `/src/datasets/table.py` | {
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"ConcatenationTable is a subclass of datasets.table.Table but not pa.Table, so it should be fine"
] | 2026-01-28T11:34:53 | 2026-01-28T13:05:28 | 2024-08-21T09:35:06 | NONE | null | null | null | null | When statically analyzing and manually reviewing the code, I noticed a potential logic conflicting in `/src/datasets/table.py` as follows:
```
def to_blocks(table: Union[pa.Table, Table]) -> list[list[TableBlock]]:
if isinstance(table, pa.Table):
return [[InMemoryTable(table)]]
elif isinstance(ta... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/7967 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7967/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7967/comments | https://api.github.com/repos/huggingface/datasets/issues/7967/events | https://github.com/huggingface/datasets/pull/7967 | 3,863,579,646 | PR_kwDODunzps6_wnm8 | 7,967 | Issue 7756 Fix - multiprocessing hang issue with start method check | {
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} | Added a fix to prevent multiprocessing hangs by checking the start method.
Detects bad multiprocessing start_method, fallback happens.
https://github.com/huggingface/datasets/issues/7756 | null | {
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https://api.github.com/repos/huggingface/datasets/issues/7966 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7966/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7966/comments | https://api.github.com/repos/huggingface/datasets/issues/7966/events | https://github.com/huggingface/datasets/pull/7966 | 3,861,774,379 | PR_kwDODunzps6_qp_e | 7,966 | Infer types from lance blobs | {
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"The docs for this PR live [here](https://moon-ci-docs.huggingface.co/docs/datasets/pr_7966). All of your documentation changes will be reflected on that endpoint. The docs are available until 30 days after the last update."
] | 2026-01-27T18:00:25 | 2026-01-28T13:02:25 | 2026-01-28T13:02:23 | MEMBER | null | null | false | {
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"merged_at": "2026-01-28T13:02... | Ex: infer Video() type in https://huggingface.co/datasets/lance-format/openvid-lance and Image() type in https://huggingface.co/datasets/lance-format/laion-1m
```python
from datasets import load_dataset
ds = load_dataset("lance-format/laion-1m", streaming=True, split="train")
print(ds.feature["image"])
# Image... | {
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https://api.github.com/repos/huggingface/datasets/issues/7965 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7965/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7965/comments | https://api.github.com/repos/huggingface/datasets/issues/7965/events | https://github.com/huggingface/datasets/issues/7965 | 3,858,483,549 | I_kwDODunzps7l-8ld | 7,965 | `huggingface_hub.errors.HfHubHTTPError: 404 Client Error: Not Found for url` when fetching a dataset with `datasets.load_dataset` | {
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"Hi ! Yes you should use `cornell-movie-review-data/rotten_tomatoes` instead of `rotten_tomatoes`, which is the legacy name. Those datasets have been moved under their actual owners accounts some time ago (but we were keeping the old names as aliases)\n\nSome other impacted names are:\n- `imdb` -> `stanfordnlp/imdb... | 2026-01-27T02:20:31 | 2026-01-28T15:14:50 | 2026-01-28T15:14:50 | NONE | null | null | null | null | Not a bug but a question. We started getting the following error:
https://github.com/mlflow/mlflow/actions/runs/21368603305/job/61506951617
```
ests/data/test_huggingface_dataset_and_source.py::test_from_huggingface_dataset_constructs_expected_dataset_with_revision - huggingface_hub.errors.HfHubHTTPError: 404 Client ... | {
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"The docs for this PR live [here](https://moon-ci-docs.huggingface.co/docs/datasets/pr_7964). All of your documentation changes will be reflected on that endpoint. The docs are available until 30 days after the last update."
] | 2026-01-26T22:56:24 | 2026-01-26T22:59:18 | 2026-01-26T22:56:38 | MEMBER | null | null | false | {
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https://api.github.com/repos/huggingface/datasets/issues/7963 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7963/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7963/comments | https://api.github.com/repos/huggingface/datasets/issues/7963/events | https://github.com/huggingface/datasets/pull/7963 | 3,856,921,322 | PR_kwDODunzps6_ajTD | 7,963 | Support null in json string cols | {
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"The docs for this PR live [here](https://moon-ci-docs.huggingface.co/docs/datasets/pr_7963). 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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"Thank you for the review!\r\n\r\nI’ve updated the implementation to:\r\n- Use Sequence from collections.abc as per project conventions\r\n- Restore backward compatibility with Union[PathLike, Sequence[PathLike]]\r\n- Keep the columns annotation as Optional[Sequence[str]]\r\n\r\nThe fixes are pushed. Please let me ... | 2026-01-26T17:01:47 | 2026-02-04T06:47:52 | 2024-08-21T09:35:06 | NONE | null | null | false | {
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} | This PR updates type annotations in Dataset.from_parquet to use Sequence instead of list to avoid mypy invariant type issues, as discussed in issue #5354.
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"The docs for this PR live [here](https://moon-ci-docs.huggingface.co/docs/datasets/pr_7961). 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/7960 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7960/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7960/comments | https://api.github.com/repos/huggingface/datasets/issues/7960/events | https://github.com/huggingface/datasets/pull/7960 | 3,847,601,199 | PR_kwDODunzps6-8Iak | 7,960 | docs: fix grammar and add type hints in splits.py | {
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src/datasets/splits.py
by:
Fixing pluralization/grammar errors in docstrings (Lines 62, 73, 403).
Adding Python type hints to the
NamedSplit
constructor for better code quality.
Verified with ruff format and ruff check. | {
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https://api.github.com/repos/huggingface/datasets/issues/7959 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7959/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7959/comments | https://api.github.com/repos/huggingface/datasets/issues/7959/events | https://github.com/huggingface/datasets/pull/7959 | 3,847,579,785 | PR_kwDODunzps6-8DsQ | 7,959 | docs: fix typo in arrow_dataset.py comment | {
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https://api.github.com/repos/huggingface/datasets/issues/7958 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7958/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7958/comments | https://api.github.com/repos/huggingface/datasets/issues/7958/events | https://github.com/huggingface/datasets/issues/7958 | 3,847,184,392 | I_kwDODunzps7lT2AI | 7,958 | [CUDA Tensors Not working in ~v4.5.0] set_format(type="torch", device="cuda") returns cpu | {
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"@lhoestq tagging you here as you were on the previous issue, hope that's fine. ",
"Thanks for reporting, let me take a look",
"I reverted this change which caused the issue #7961 , I'll do a new release soon but in the meantime feel free to install `datasets` from source",
"@lhoestq thanks a lot. I am actual... | 2026-01-23T12:06:48 | 2026-01-25T05:30:53 | 2024-08-21T09:35:06 | NONE | null | null | null | null | ### Describe the bug
The problem is that when calling:
```ds.set_format(type="torch", columns = ["input", "labels"], device="cuda")```
The device type of the individual datapoints is now: `cpu` as opposed to `cuda:0`.
With `v4.0.0` it still works. With `v4.5.0` it doesn't work anymore.
Related Issue:
https://github... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/7957 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7957/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7957/comments | https://api.github.com/repos/huggingface/datasets/issues/7957/events | https://github.com/huggingface/datasets/pull/7957 | 3,839,573,271 | PR_kwDODunzps6-hVW5 | 7,957 | Fix all exhausted without replacement | {
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"Hi maintainers 👋 \r\nThis PR fixes `all_exhausted_without_replacement` to ensure all samples are emitted exactly once, \r\nand adds a regression test reproducing the reported issue.\r\n\r\nHappy to adjust the implementation or split changes if you’d prefer.\r\nThanks!\r\n",
"We just merged https://github.com/... | 2026-01-21T18:47:32 | 2026-01-23T16:09:28 | 2026-01-23T16:09:28 | NONE | null | null | false | {
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} | Fix interleave_datasets "all_exhausted_without_replacement" stopping strategy
- Corrected logic to ensure each sample is picked exactly once when using
stopping_strategy="all_exhausted_without_replacement".
- Adjusted boolean stopping condition to properly track dataset exhaustion.
- Added test to verify the l... | {
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"Yes, that's a hard limit. Can you split your files into different folders? Or we'll probably have a new repo type in the near to mid future that will relax this limit a bit. ",
"Thanks! Working around this with a different sharding parameter to have fewer overall fragments (and therefore fewer files in `*.lance/... | 2026-01-21T16:37:38 | 2026-01-22T09:38:38 | 2024-08-21T09:35:06 | NONE | null | null | null | null | ### Feature request
Can the hard limit of 10k files per folder be extended with acceptable loss in performance?
### Motivation
I'm uploading a lance dataset to huggingface hub and have a folder inside lance internals (`data/*.lance/_transactions`) that has > 20k atomic transaction records and my commits are being re... | null | {
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"The docs for this PR live [here](https://moon-ci-docs.huggingface.co/docs/datasets/pr_7955). 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": "2026-01-23T16:08... | When using interleave_datasets with stopping_strategy="all_exhausted_without_replacement" and probabilities=None, the function was incorrectly falling into the undersampling branch, causing it to stop at min(lengths) instead of continuing until all datasets were exhausted.
This fix adds a specific branch to handle t... | {
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>>> from datasets import Dataset, interleave_datasets
>>> d1 = Dataset.from_dict({"a": [0, 1, 2]})
>>> d2 = Dataset.from_dict({"a": [10, 11, 12, 13]})
>>> d3 = Dataset.from_dict({"a": [20, 21, 22]})
>>> dataset = interleave_datasets([d1, d2, d3], stopping_strategy="all_exhausted_without_replacemen... | null | {
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} | \This PR replaces `list` type hints with `Sequence` in `from_parquet` to improve type checking.
Note: Local pytest errors on Python 3.13 due to removal of `distutils` are unrelated to this change.
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} | This PR replaces `list` type hints with `Sequence` in `from_parquet` to improve type checking.
Note: Local pytest errors on Python 3.13 due to removal of `distutils` are unrelated to this change.
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https://api.github.com/repos/huggingface/datasets/issues/7951 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7951/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7951/comments | https://api.github.com/repos/huggingface/datasets/issues/7951/events | https://github.com/huggingface/datasets/pull/7951 | 3,827,686,741 | PR_kwDODunzps6951bw | 7,951 | feat: Add GenBank file format support for biological sequence data | {
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} | ## Summary
Add native support for loading GenBank (.gb, .gbk, .genbank) files, a standard format for biological sequence data with annotations maintained by NCBI.
## Changes
- Add `genbank` packaged module with pure Python state machine parser
- Register GenBank extensions in `_PACKAGED_DATASETS_MODULES` and `_EXTENSI... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/7950 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7950/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7950/comments | https://api.github.com/repos/huggingface/datasets/issues/7950/events | https://github.com/huggingface/datasets/pull/7950 | 3,825,689,242 | PR_kwDODunzps69zsW1 | 7,950 | Add examples for Lance datasets | {
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"The docs for this PR live [here](https://moon-ci-docs.huggingface.co/docs/datasets/pr_7950). All of your documentation changes will be reflected on that endpoint. The docs are available until 30 days after the last update.",
"Hi @prrao87 ! All the main examples with pylance should be in their dedicated documenta... | 2026-01-17T19:33:31 | 2026-01-23T16:40:20 | 2026-01-23T16:16:43 | CONTRIBUTOR | null | null | false | {
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"merged_at": "2026-01-23T16:16... | ## Summary
Updated the Lance integration docs to match the official dataset cards and expand coverage of multimodal workflows in `use_with_lance.mdx`.
## Details
- Added a Lance format-focused guidance page for multimodal examples:
- Stream from the Hub via `datasets` API
- Use Lance's dataset API to p... | {
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https://api.github.com/repos/huggingface/datasets/issues/7949 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7949/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7949/comments | https://api.github.com/repos/huggingface/datasets/issues/7949/events | https://github.com/huggingface/datasets/pull/7949 | 3,824,515,306 | PR_kwDODunzps69v3lh | 7,949 | docs: clarify documentation build instructions | {
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"This PR clarifies the documentation build instructions by improving wording and adding clarity for local builds."
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https://api.github.com/repos/huggingface/datasets/issues/7948 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7948/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7948/comments | https://api.github.com/repos/huggingface/datasets/issues/7948/events | https://github.com/huggingface/datasets/pull/7948 | 3,824,437,597 | PR_kwDODunzps69vnHh | 7,948 | json: add optional return_file_name parameter | {
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} | This PR adds an optional `return_file_name` parameter to the JSON dataset loader.
When enabled, a new `file_name` column is added containing the source file name
for each row. Default behavior is unchanged.
Changes:
- Add `return_file_name` to JsonConfig
- Append file name during JSON table generation
- Add t... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/7947 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7947/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7947/comments | https://api.github.com/repos/huggingface/datasets/issues/7947/events | https://github.com/huggingface/datasets/issues/7947 | 3,823,309,787 | I_kwDODunzps7j4xPb | 7,947 | MMLU get_dataset_config_names provides different lists of subsets in online and offline modes | {
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When getting the config names of `cais/mmlu` in online mode, it provides the different subjects and `all` but in offline mode is provides `default` even with cached version of the dataset.
### Steps to reproduce the bug
1. First download dataset in online mode so that it is cached:
```
$ HF_DATA... | null | {
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"This is a really interesting approach, especially combining parallel parquet\nconversion with upload_large_folder and hf_xet.\n\nOne question / observation:\nThe shard calculation currently uses max_shard_size_mb as a proxy for\nsamples_per_shard. Since sample size can vary a lot across datasets,\nwould it make se... | 2026-01-15T13:54:37 | 2026-01-17T13:27:20 | 2024-08-21T09:35:06 | NONE | null | null | null | null | # Question: Is there a faster way to `push_to_hub` for large image datasets? Or could this approach be integrated?
Hi! I frequently work with large image datasets (100k-300k+ samples) and found that `dataset.push_to_hub()` can be quite slow.
cc @lhoestq - would love your thoughts on this!
I experimented with an alte... | null | {
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"The docs for this PR live [here](https://moon-ci-docs.huggingface.co/docs/datasets/pr_7943). 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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```python
from datasets import load_dataset_builder, StreamingDownloadManager
dlm = StreamingDownloadManager()
def get_shards(dataset_name, *args, **kwargs):
b = load_dataset_builder(dataset_name, *args, **kwargs)
splits = b._split_generators(dlm)
return list(... | {
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https://api.github.com/repos/huggingface/datasets/issues/7942 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7942/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7942/comments | https://api.github.com/repos/huggingface/datasets/issues/7942/events | https://github.com/huggingface/datasets/pull/7942 | 3,808,890,451 | PR_kwDODunzps687sR_ | 7,942 | add _OverridableIOWrapper | {
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https://api.github.com/repos/huggingface/datasets/issues/7941 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7941/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7941/comments | https://api.github.com/repos/huggingface/datasets/issues/7941/events | https://github.com/huggingface/datasets/pull/7941 | 3,807,800,603 | PR_kwDODunzps684EZa | 7,941 | Remove Python 3.7 and Python 2 code paths from _dill.py | {
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} | This PR simplifies the code pickle handling to only support Python 3.9+.
Datasets requires Python 3.9+ (since PR #7474).
There's some dill specific code branches checking for earlier versions of python which can be removed. | null | {
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https://api.github.com/repos/huggingface/datasets/issues/7940 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7940/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7940/comments | https://api.github.com/repos/huggingface/datasets/issues/7940/events | https://github.com/huggingface/datasets/pull/7940 | 3,807,386,503 | PR_kwDODunzps682sBj | 7,940 | Improve readability and documentation of indexing integration tests | {
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} | ### Summary
This PR improves the readability and maintainability of the indexing integration tests by adding clear, detailed comments throughout the test suite.
### Motivation
The indexing tests cover multiple backends (FAISS and Elasticsearch) and involve non-trivial workflows such as vector creation, indexing, q... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/7939 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7939/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7939/comments | https://api.github.com/repos/huggingface/datasets/issues/7939/events | https://github.com/huggingface/datasets/issues/7939 | 3,806,889,870 | I_kwDODunzps7i6IeO | 7,939 | datasets.load_from_disk progress bar optional manual control | {
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This is tangentially related to [https://github.com/huggingface/datasets/issues/7918](https://github.com/huggingface/datasets/issues/7918).
When loading a dataset with > 16 files a progress bar is shown (unless stdout is redirected or [https://github.com/huggingface/datasets/pull/7919](https://git... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/7938 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7938/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7938/comments | https://api.github.com/repos/huggingface/datasets/issues/7938/events | https://github.com/huggingface/datasets/pull/7938 | 3,804,486,642 | PR_kwDODunzps68tYX1 | 7,938 | Fix method to retrieve attributes from file object | {
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"The docs for this PR live [here](https://moon-ci-docs.huggingface.co/docs/datasets/pr_7938). 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/7937 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7937/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7937/comments | https://api.github.com/repos/huggingface/datasets/issues/7937/events | https://github.com/huggingface/datasets/pull/7937 | 3,803,185,984 | PR_kwDODunzps68pBId | 7,937 | Fix duplicate log messages by disabling log propagation by default | {
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} | This PR fixes an issue where applications that configure logging see duplicate messages from `datasets`:
```python
import logging
logging.basicConfig(level=logging.WARNING)
from datasets.utils.logging import get_logger
get_logger("datasets.load").warning("This appears twice")
```
Outputs:
```
This appears ... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/7936 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7936/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7936/comments | https://api.github.com/repos/huggingface/datasets/issues/7936/events | https://github.com/huggingface/datasets/issues/7936 | 3,795,750,271 | I_kwDODunzps7iPo1_ | 7,936 | _add_retries_to_file_obj_read_method makes file_obj invalid for pyarrow | {
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"hmm not sure how to fix this, I believe `file_obj.__getattr__ = lambda _, attr: getattr(orig_file_obj, attr)` would make all the methods point to the original file_obj",
"> hmm not sure how to fix this, I believe `file_obj.__getattr__ = lambda _, attr: getattr(orig_file_obj, attr)` would make all the methods poi... | 2026-01-09T07:05:25 | 2026-01-14T13:47:50 | 2026-01-13T13:38:03 | NONE | null | null | null | null | ### Describe the bug
I'm trying to use `load_dataset` to construct a dataset that read parquet data on HDFS streamingly, like
```python
ds = load_dataset(
"parquet",
data_files={
"train": "hdfs://xxx/train*.parquet",
"test": "hdfs://xxx/test*.parquet"
},
streaming=True,
)
```
I encounte... | {
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https://api.github.com/repos/huggingface/datasets/issues/7935 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7935/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7935/comments | https://api.github.com/repos/huggingface/datasets/issues/7935/events | https://github.com/huggingface/datasets/pull/7935 | 3,795,376,274 | PR_kwDODunzps68QDVY | 7,935 | Bug fix: Add HDFS hostname to protocol prefix | {
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"Hi ! is it related to https://github.com/huggingface/datasets/issues/7934 ?\r\n\r\nIt's not clear to me why the protocol would need this, given hostname should be present in `pattern` already\r\n\r\n```python\r\nresolve_pattern(\"hdfs://hostname/user/xxx\", ...)\r\n```",
"> Hi ! is it related to #7934 ?\r\n> \r\... | 2026-01-09T03:59:45 | 2026-01-15T04:06:17 | 2024-08-21T09:35:06 | NONE | null | null | false | {
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} | For HDFS url with hostname like `hdfs://hostname/user/xxx`, the function `resolve_pattern` would drop the hostname, and outputs `hdfs:///user/xxx`. This may break later file operations by trying to connect to wrong HDFS cluster. | null | {
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https://api.github.com/repos/huggingface/datasets/issues/7934 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7934/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7934/comments | https://api.github.com/repos/huggingface/datasets/issues/7934/events | https://github.com/huggingface/datasets/issues/7934 | 3,792,642,445 | I_kwDODunzps7iDyGN | 7,934 | xPath cannot handle hdfs:///xxxx properly | {
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_as_str('hdfs:///xxxx') would return hdfs://xxxx. Removing one / and making the path invalid.
For the use case like
```
ds = load_dataset(
"parquet",
data_files={
"train": "hdfs:///user/path/to/data/train*.parquet",
},
streaming=True,
storage_options={
"host": ... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/7933 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7933/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7933/comments | https://api.github.com/repos/huggingface/datasets/issues/7933/events | https://github.com/huggingface/datasets/pull/7933 | 3,780,607,384 | PR_kwDODunzps67fNaP | 7,933 | feat: Add Apache TsFile format support | {
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"The docs for this PR live [here](https://moon-ci-docs.huggingface.co/docs/datasets/pr_7933). All of your documentation changes will be reflected on that endpoint. The docs are available until 30 days after the last update."
] | 2026-01-05T08:28:12 | 2026-01-06T10:26:51 | 2024-08-21T09:35:06 | NONE | null | null | false | {
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} | # Add Apache TsFile format support
Adds support for loading `.tsfile` datasets. Closes #7922.
## What's TsFile?
[Apache TsFile](https://tsfile.apache.org/) is a columnar time-series format popular in IoT. The TsFile community requested this integration and offered to help maintain it.
## What I did
Creat... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/7932 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7932/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7932/comments | https://api.github.com/repos/huggingface/datasets/issues/7932/events | https://github.com/huggingface/datasets/pull/7932 | 3,777,725,050 | PR_kwDODunzps67WqhL | 7,932 | Fix duplicate keyword conflict in load_dataset_builder | {
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"Hi HuggingFace team\r\nThis PR fixes issue #4910 by safely merging builder_kwargs and config_kwargs to avoid duplicate keyword errors. \r\nA regression test is included to ensure this does not happen again. \r\n\r\nPlease let me know if you’d like any changes. Thanks!\r\n"
] | 2026-01-03T05:49:06 | 2026-01-03T05:52:02 | 2024-08-21T09:35:06 | NONE | null | null | false | {
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} | Fixes #4910
This PR fixes a bug where passing the same keyword in builder_kwargs and
config_kwargs caused a TypeError in load_dataset_builder.
The kwargs are now merged safely so config_kwargs override builder_kwargs
without duplication. A regression test is added to prevent this from
happening again.
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https://api.github.com/repos/huggingface/datasets/issues/7931 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7931/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7931/comments | https://api.github.com/repos/huggingface/datasets/issues/7931/events | https://github.com/huggingface/datasets/issues/7931 | 3,777,662,799 | I_kwDODunzps7hKo9P | 7,931 | Enable CORS + HTTP Range support for browser partial reads on cas-bridge.xethub.hf.co (Parquet row-group access) | {
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"Cc @assafvayner maybe ? or @cfahlgren1 @severo if you've already encountered this ?",
"OK, reproduced with hyparquet on https://huggingface.co/spaces/hyperparam/hyperparam, see https://huggingface.co/spaces/hyperparam/hyperparam?url=https%3A%2F%2Fhuggingface.co%2Fdatasets%2Ffacebook%2Fresearch-plan-gen%2Fblob%2F... | 2026-01-03T04:23:54 | 2026-01-12T21:51:41 | 2024-08-21T09:35:06 | NONE | null | null | null | null | ### Feature request
## Summary
Browser-based data tools need Range requests to read Parquet efficiently (footer + selected row groups). Downloads from the Hub redirect to cas-bridge.xethub.hf.co (Xet bridge). The redirected host fails CORS preflight for Range/HEAD workflows, blocking partial reads. ([Hugging Face](htt... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/7930 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7930/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7930/comments | https://api.github.com/repos/huggingface/datasets/issues/7930/events | https://github.com/huggingface/datasets/pull/7930 | 3,777,628,848 | PR_kwDODunzps67WYwc | 7,930 | Proposal: Protein 3D Structure Visualization for Dataset Viewer | {
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"cc @georgia-hf - Following up on your question about protein visualization for the Dataset Viewer. This proposal recommends 3Dmol.js (~150KB gzipped) as a lightweight alternative to Mol* (~1.3MB gzipped).\n\nLooking forward to your feedback!",
"Exciting ! cc @cfahlgren1 @severo for the Viewer part\r\n\r\nFor the... | 2026-01-03T03:30:01 | 2026-01-26T16:17:25 | 2024-08-21T09:35:06 | NONE | null | null | false | {
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} | # Proposal: Protein 3D Structure Visualization for HuggingFace Dataset Viewer
## Executive Summary
This proposal outlines adding 3D protein structure visualization to the HuggingFace Dataset Viewer, enabling users to interactively view PDB and mmCIF molecular structures directly within the dataset preview interface.
... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/7929 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7929/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7929/comments | https://api.github.com/repos/huggingface/datasets/issues/7929/events | https://github.com/huggingface/datasets/pull/7929 | 3,776,098,655 | PR_kwDODunzps67Rayd | 7,929 | Raise early for invalid `revision` in `load_dataset` | {
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"Passes\r\n```sh\r\npytest -k \"LoadTest and test_load_dataset_invalid_revision_with_cache\"\r\n```\r\n\r\nFails\r\n```sh\r\ngit checkout cc2399019a3a547ebc31ec68a1ff99abd4ec93ce\r\npytest -k \"LoadTest and test_load_dataset_invalid_revision_with_cache\"\r\n```\r\n\r\nRan `make test`, but failures look unrelated to... | 2026-01-02T10:40:49 | 2026-01-09T11:08:44 | 2026-01-09T11:08:43 | CONTRIBUTOR | null | null | false | {
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Raise early for invalid revisions
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https://api.github.com/repos/huggingface/datasets/issues/7928 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7928/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7928/comments | https://api.github.com/repos/huggingface/datasets/issues/7928/events | https://github.com/huggingface/datasets/issues/7928 | 3,775,842,185 | I_kwDODunzps7hDseJ | 7,928 | `load_dataset` `revision` param not respected when fetching from cache | {
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"This might be better placed as a feature request not a bug, since the logging `Using the latest cached version of the dataset since sentientfutures/ahb couldn't be found on the Hugging Face Hub` is clear.",
"https://github.com/huggingface/datasets/pull/7929 This only solves the case of invalid revisions. Fetchin... | 2026-01-02T08:20:47 | 2026-01-07T07:50:40 | 2024-08-21T09:35:06 | CONTRIBUTOR | null | null | null | null | ### Describe the bug
`datasets.load_dataset` `revision` semantics are a bit inconsistent when the dataset is not found on the huggingface hub. When fetching the latest cached version of the dataset, the `revision` argument is ignored, so long as any cached versions of the dataset already exist in the HF cache.
### St... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/7927 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7927/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7927/comments | https://api.github.com/repos/huggingface/datasets/issues/7927/events | https://github.com/huggingface/datasets/issues/7927 | 3,775,302,438 | I_kwDODunzps7hBosm | 7,927 | Using Stateful Dataloader with Split Dataset By Node and DCP for DDP | {
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"Does it need to be pickled?\n\n```python\n def load_state_dict(self, state_dict):\n hf_state = pickle.loads(state_dict[\"data\"])\n self.train_dataset.load_state_dict(hf_state)\n\n def state_dict(self):\n return {\"data\": pickle.dumps(self.train_dataset.state_dict())}\n```",
"Pickling... | 2026-01-01T22:27:07 | 2026-02-01T06:13:30 | 2024-08-21T09:35:06 | NONE | null | null | null | null | ### Describe the bug
I am trying to determine how to save and load the Stateful Dataloader State with DCP and Split Dataset by Node for DDP.
Currently, I am running into the issue where I am receiving a slow resume.
```
Neither dataset nor iter(dataset) defines state_dict/load_state_dict so we are naively fast-forwar... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/7926 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7926/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7926/comments | https://api.github.com/repos/huggingface/datasets/issues/7926/events | https://github.com/huggingface/datasets/pull/7926 | 3,773,696,472 | PR_kwDODunzps67Jxxz | 7,926 | Add lightweight PDB (Protein Data Bank) file support | {
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} | ## Summary
This PR adds support for loading PDB (Protein Data Bank) files with `load_dataset()`, following the **ImageFolder pattern** where **one row = one structure**.
Based on feedback from @lhoestq in #7930, this approach makes datasets more practical for ML workflows:
- Each row is independent, enabling train/te... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/7925 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7925/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7925/comments | https://api.github.com/repos/huggingface/datasets/issues/7925/events | https://github.com/huggingface/datasets/pull/7925 | 3,773,577,850 | PR_kwDODunzps67JW3g | 7,925 | feat: Add mmCIF file support for macromolecular structures | {
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} | ## Summary
This PR adds support for loading mmCIF (macromolecular Crystallographic Information File) files with `load_dataset()`, following the **ImageFolder pattern** where **one row = one structure**.
Based on feedback from @lhoestq in #7930, this approach makes datasets more practical for ML workflows:
- Each row ... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/7924 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7924/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7924/comments | https://api.github.com/repos/huggingface/datasets/issues/7924/events | https://github.com/huggingface/datasets/pull/7924 | 3,773,509,771 | PR_kwDODunzps67JHNF | 7,924 | Add lightweight FASTQ file format support | {
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} | ## Summary
This PR adds support for loading FASTQ files directly with `load_dataset()`.
FASTQ is an extension of FASTA that includes quality scores for each base, widely used for storing output from high-throughput sequencing instruments.
### Key Features
- **Zero external dependencies** - Pure Python parser based o... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/7923 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7923/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7923/comments | https://api.github.com/repos/huggingface/datasets/issues/7923/events | https://github.com/huggingface/datasets/pull/7923 | 3,773,472,998 | PR_kwDODunzps67I-y3 | 7,923 | feat(fasta): add lightweight FASTA file format support | {
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} | ## Summary
This PR adds support for loading FASTA files directly with `load_dataset()`, addressing feedback from #7851.
FASTA is a text-based format for representing nucleotide sequences (DNA/RNA) or peptide sequences (proteins), widely used in bioinformatics.
## Key Features
- **Zero external dependencies** - Uses... | null | {
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"A large quantity of industrial timeseries data has been stored as TsFile, and I have been constantly hearing about AI fellows complaining about the lack of data or the insufficiency of data quality.\n\nI like the ambition that uses TsFile as the bridge between AI research and industrial analysis requirements. This... | 2025-12-31T08:07:51 | 2026-01-05T08:23:21 | 2024-08-21T09:35:06 | NONE | null | null | null | null | ### Feature request
I would love to use Hugging Face datasets library to directly load datasets composed of .tsfile files, for example:
`ds = load_dataset("username/dataset-with-tsfile-files")`
This feature would allow researchers working on time-series tasks to seamlessly integrate datasets stored in the Apache TsF... | null | {
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} | This PR adds a small beginner-friendly tip to help users quickly verify whether 🤗 Datasets is installed correctly by loading a simple dataset.
This improves onboarding experience for first-time users and reduces confusion for beginners.
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https://api.github.com/repos/huggingface/datasets/issues/7920 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7920/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7920/comments | https://api.github.com/repos/huggingface/datasets/issues/7920/events | https://github.com/huggingface/datasets/pull/7920 | 3,766,070,566 | PR_kwDODunzps66wgLx | 7,920 | Add progress_format support for machine-readable progress output | {
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} | ## Summary
Adds support to , enabling machine-readable JSON progress output similar to [huggingface/tokenizers#1921](https://github.com/huggingface/tokenizers/pull/1921).
## Motivation
When using `datasets` in automated pipelines or UI applications, it's useful to emit machine-readable progress instead of ANSI prog... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/7919 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7919/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7919/comments | https://api.github.com/repos/huggingface/datasets/issues/7919/events | https://github.com/huggingface/datasets/pull/7919 | 3,765,768,457 | PR_kwDODunzps66vmQC | 7,919 | Fix load_from_disk progress bar with redirected stdout | {
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"this seems to contradict the comment that says \r\n\r\n> set `disable=None` rather than `disable=False` by default to disable progress bar when no TTY attached\r\n\r\nI believe the right approach is to do the same as in https://github.com/huggingface/huggingface_hub/pull/2698",
"> this seems to contradict the co... | 2025-12-28T15:39:31 | 2026-01-16T14:44:49 | 2026-01-16T14:44:49 | CONTRIBUTOR | null | null | false | {
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"merged_at": "2026-01-16T14:44... | Fixes #7918
## Problem
When using `load_from_disk()` with `contextlib.redirect_stdout()`, the progress bar was not showing even for datasets with >16 files.
## Root Cause
The `disable` parameter was set to `None` which triggers TTY auto-detection. This fails when stdout is redirected, causing the progress ba... | {
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https://api.github.com/repos/huggingface/datasets/issues/7918 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7918/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7918/comments | https://api.github.com/repos/huggingface/datasets/issues/7918/events | https://github.com/huggingface/datasets/issues/7918 | 3,765,489,462 | I_kwDODunzps7gcM82 | 7,918 | datasets.load_from_disk doesn't show progress bar | {
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"#self-assign"
] | 2025-12-28T09:14:41 | 2026-01-16T14:44:50 | 2026-01-16T14:44:50 | NONE | null | null | null | null | ### Describe the bug
This is the inverse of the bug at [https://github.com/huggingface/datasets/issues/7030](https://github.com/huggingface/datasets/issues/7030), i.e. that `datasets.load_from_disk(path)` displays no progress bar. My dataset has > 16 files in it.
I am redirecting stdout as I capture the log, could th... | {
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https://api.github.com/repos/huggingface/datasets/issues/7917 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7917/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7917/comments | https://api.github.com/repos/huggingface/datasets/issues/7917/events | https://github.com/huggingface/datasets/issues/7917 | 3,764,913,807 | I_kwDODunzps7gaAaP | 7,917 | IterableDataset supports automatic sharding | {
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"You can already use `.shard()` instead like this:\n\n```python\ndataset = dataset.shard(index=rank, num_shards=world_size)\n```\n\nnote that it requires that `dataset.num_shards >= world_size`, and that it may result in nodes having the same number of shards +- 1",
"> You can already use `.shard()` instead like ... | 2025-12-27T16:48:29 | 2025-12-29T16:06:52 | 2024-08-21T09:35:06 | NONE | null | null | null | null | ### Feature request
Added sharding function support to the streaming IterableDataset, allowing users to adjust the number of shards according to their training resources. For example:
```
dataset = load_dataset(*, stream=True)
dataset = dataset.shard(num_shards=num_shards, num_samples=num_samples) #We may need to know... | null | {
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"tentatively tagging @simonpfish ^\n\n(if it's an option you could enable PRs/Discussions on your dataset on HF)"
] | 2025-12-25T13:56:55 | 2025-12-26T09:06:13 | 2024-08-21T09:35:06 | NONE | null | null | null | null | The [openai/gdpval](https://huggingface.co/datasets/openai/gdpval) dataset on Hugging Face contains Word .docx files with two types of corruption that cause Microsoft Word to display an "unreadable content" error.
### Root Causes
1. **Corrupted settings.xml**: The `word/settings.xml` file uses incorrect namespace pre... | null | {
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"I was able to install torchcodec by building it from source and have put together a PR: https://github.com/vllm-project/vllm/pull/31323\n\nStill I think it would make this framework more robust to add at least one fallback lib (that is more widely used) in place should torchcodec installation fail or library is no... | 2025-12-24T19:39:17 | 2025-12-28T07:25:42 | 2024-08-21T09:35:06 | NONE | null | null | null | null | ### Describe the bug
Datasets library is widely used by many Python packages. Naturally, it is a requirement on many platforms. This includes vLLM for ROCm. During audio dataset tests, there is an exception triggered:
```python
def decode_example(
self, value: dict, token_per_repo_id: Optional[dict[str, Un... | null | {
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"Mentioned https://github.com/huggingface/datasets/issues/7863 as well",
"@pdames for vis",
"The docs for this PR live [here](https://moon-ci-docs.huggingface.co/docs/datasets/pr_7913). All of your documentation changes will be reflected on that endpoint. The docs are available until 30 days after the last upda... | 2025-12-24T00:52:20 | 2026-01-09T10:48:29 | 2026-01-09T10:48:29 | CONTRIBUTOR | null | null | false | {
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"merged_at": "2026-01-09T10:48... | Add lance format as one of the `packaged_modules`.
```py
import datasets
ds = datasets.load_dataset("org/lance_repo", split="train")
# Or
ds = datasets.load_dataset("./local/data.lance")
``` | {
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https://api.github.com/repos/huggingface/datasets/issues/7912 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7912/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7912/comments | https://api.github.com/repos/huggingface/datasets/issues/7912/events | https://github.com/huggingface/datasets/pull/7912 | 3,755,023,829 | PR_kwDODunzps66NQzG | 7,912 | fix low but large example indexerror | {
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"merged_at": "2026-01-09T13:23... | Fixes #7911.
This PR simply implements the approach outlined in the corresponding issue, that if we have large examples, the number of shards should never be more than the number of samples. This is an absolute edge case, but can happen for image data. | {
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https://api.github.com/repos/huggingface/datasets/issues/7911 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7911/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7911/comments | https://api.github.com/repos/huggingface/datasets/issues/7911/events | https://github.com/huggingface/datasets/issues/7911 | 3,753,447,559 | I_kwDODunzps7fuRCH | 7,911 | IndexError when saving few large examples to disk | {
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I ran into this issue when processing a file (900MB) with just one example but simplified for a quicker reproducer below. The problem is that, if `num_shards` is not explicitly set, we calculate it manually using https://github.com/huggingface/datasets/blob/main/src/datasets/utils/py_utils.py#L96 ... | {
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https://api.github.com/repos/huggingface/datasets/issues/7910 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7910/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7910/comments | https://api.github.com/repos/huggingface/datasets/issues/7910/events | https://github.com/huggingface/datasets/pull/7910 | 3,749,894,414 | PR_kwDODunzps658oGv | 7,910 | Enhance cast_column() with cast_kwargs parameter | {
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https://api.github.com/repos/huggingface/datasets/issues/7909 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7909/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7909/comments | https://api.github.com/repos/huggingface/datasets/issues/7909/events | https://github.com/huggingface/datasets/issues/7909 | 3,749,885,131 | I_kwDODunzps7fgrTL | 7,909 | Support cast_kwargs in cast_columns | {
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expose `cast(**cast_kwargs)` to `cast_column()`
https://github.com/huggingface/datasets/blob/0feb65dd8733191dd2d1e74215b422fc5939a56a/src/datasets/arrow_dataset.py#L2205
### Motivation
`cast_column()` wraps `cast()` function without exposing any `cast()` args. For large multi-modal datasets, e.g... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/7906 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7906/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7906/comments | https://api.github.com/repos/huggingface/datasets/issues/7906/events | https://github.com/huggingface/datasets/pull/7906 | 3,747,764,992 | PR_kwDODunzps651jiI | 7,906 | Don't save original_shard_lengths by default for backward compat | {
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"merged_at": "2025-12-19T14:57... | following #7897
but let users enable it with `datasets.config.SAVE_ORIGINAL_SHARD_LENGTHS = True`
this is useful for the Dataset Viewer to know where each row comes from after converting to parquet | {
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https://api.github.com/repos/huggingface/datasets/issues/7905 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7905/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7905/comments | https://api.github.com/repos/huggingface/datasets/issues/7905/events | https://github.com/huggingface/datasets/issues/7905 | 3,734,233,245 | I_kwDODunzps7ek-Cd | 7,905 | Unbounded network usage when opening Data Studio | {
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"cc @cfahlgren1",
"Thanks for reporting! Looking into this!",
"This should be fixed. Thank you for your patience! 🤗"
] | 2025-12-16T10:45:02 | 2026-01-06T15:04:43 | 2026-01-06T15:04:43 | NONE | null | null | null | null | ### Describe the bug
Opening the Data Studio tab on a dataset page triggers continuous and unbounded network traffic. This issue occurs across multiple browsers and continues even without user interaction.
### Steps to reproduce the bug
https://huggingface.co/datasets/slone/nllb-200-10M-sample/viewer
### Expected... | {
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https://api.github.com/repos/huggingface/datasets/issues/7904 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7904/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7904/comments | https://api.github.com/repos/huggingface/datasets/issues/7904/events | https://github.com/huggingface/datasets/issues/7904 | 3,727,978,498 | I_kwDODunzps7eNHAC | 7,904 | Request: Review pending neuroimaging PRs (#7886 BIDS loader, #7887 lazy loading) | {
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"Hi ! sure I'll be happy to take a look, sorry for the delay :)"
] | 2025-12-14T20:34:31 | 2025-12-15T11:25:29 | 2024-08-21T09:35:06 | CONTRIBUTOR | null | null | null | null | ## Summary
I'm building production neuroimaging pipelines that depend on `datasets` and would benefit greatly from two pending PRs being reviewed/merged.
## Pending PRs
| PR | Description | Status | Open Since |
|----|-------------|--------|------------|
| [#7886](https://github.com/huggingface/datasets/pull/7886) |... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/7903 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7903/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7903/comments | https://api.github.com/repos/huggingface/datasets/issues/7903/events | https://github.com/huggingface/datasets/pull/7903 | 3,723,395,305 | PR_kwDODunzps64kO0d | 7,903 | Docs: add minimal usage example to dataset card guidelines | {
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https://api.github.com/repos/huggingface/datasets/issues/7902 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7902/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7902/comments | https://api.github.com/repos/huggingface/datasets/issues/7902/events | https://github.com/huggingface/datasets/issues/7902 | 3,723,281,150 | I_kwDODunzps7d7ML- | 7,902 | The child process retrieves the dataset directly from the main process instead of executing `memory_mapped_arrow_table_from_file`. | {
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"Memory mapping is actually the way for processes to share memory efficiently and without copy. It is efficient when on are using a local disk, and it's discouraged to use it on remote disk for the reasons you observed.\n\nWhat you can do instead is save the dataset as Parquet on your remote storage (or on Hugging ... | 2025-12-12T12:37:44 | 2025-12-15T11:48:16 | 2024-08-21T09:35:06 | NONE | null | null | null | null | ### Feature request
The child process retrieves the dataset directly from the main process instead of executing `memory_mapped_arrow_table_from_file`.
### Motivation
Because my local disk space is insufficient, I can only store a dataset on a remote Ceph server and process it using datasets.
I used the data-juicer[h... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/7901 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7901/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7901/comments | https://api.github.com/repos/huggingface/datasets/issues/7901/events | https://github.com/huggingface/datasets/issues/7901 | 3,722,243,543 | I_kwDODunzps7d3O3X | 7,901 | ShuffledDataSourcesArrowExamplesIterable cannot properly resume from checkpoint | {
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"Hi ! As you can read in the logs, the shuffle buffer content is lost when resuming a shuffled dataset. The default size is 1000 examples, but you can tweak it\n\ne.g. if you run your code with this\n\n```diff\n- ds = Dataset.from_dict({\"a\": range(12)}).to_iterable_dataset(num_shards=1)\n- ds = ds.shuffle(seed=42... | 2025-12-12T06:57:32 | 2025-12-16T19:34:46 | 2024-08-21T09:35:06 | NONE | null | null | null | null | ### Describe the bug
ShuffledDataSourcesArrowExamplesIterable cannot properly resume from checkpoint
### Steps to reproduce the bug
1. The reproducible code is as follows：
```
from datasets import Dataset, concatenate_datasets, interleave_datasets
ds = Dataset.from_dict({"a": range(12)}).to_iterable_dataset(num_sha... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/7900 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7900/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7900/comments | https://api.github.com/repos/huggingface/datasets/issues/7900/events | https://github.com/huggingface/datasets/issues/7900 | 3,711,751,590 | I_kwDODunzps7dPNWm | 7,900 | `Permission denied` when sharing cache between users | {
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"I remember a fix from last year to usr the current umask for filelock 3.10.0, which filelock version are you using ? can you try another version ?",
"I believe we we are using `filelock==3.19.1`. Do you have a recommended version to use?",
"Our test suite has been testing all versions over time for years now, ... | 2025-12-09T16:41:47 | 2026-01-09T11:08:36 | 2024-08-21T09:35:06 | NONE | null | null | null | null | ### Describe the bug
We want to use `datasets` and `transformers` on a shared machine. Right now, each user has a separate HF_HOME in their home directory. To reduce duplicates of the datasets, we want to share that cache. While experimenting, we are running into `Permission denied` errors.
It looks like this was sup... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/7899 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7899/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7899/comments | https://api.github.com/repos/huggingface/datasets/issues/7899/events | https://github.com/huggingface/datasets/pull/7899 | 3,707,063,236 | PR_kwDODunzps63t1LS | 7,899 | Add inspect_ai eval logs support | {
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"The docs for this PR live [here](https://moon-ci-docs.huggingface.co/docs/datasets/pr_7899). All of your documentation changes will be reflected on that endpoint. The docs are available until 30 days after the last update.",
"Very cool! \r\n\r\nAny reason not to directly use inspect for loading/converting from t... | 2025-12-08T16:14:40 | 2025-12-09T14:45:15 | 2025-12-09T14:45:13 | MEMBER | null | null | false | {
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"merged_at": "2025-12-09T14:45... | Support for .eval log files from inspect_ai
They are actually ZIP files according to the source code at https://github.com/UKGovernmentBEIS/inspect_ai/blob/main/src/inspect_ai/log/_log.py
Unfortunately their format can't be converted to Parquet, so I had to JSON-encode all the nested values
```python
ds = loa... | {
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https://api.github.com/repos/huggingface/datasets/issues/7898 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7898/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7898/comments | https://api.github.com/repos/huggingface/datasets/issues/7898/events | https://github.com/huggingface/datasets/pull/7898 | 3,698,376,429 | PR_kwDODunzps63Q9BO | 7,898 | docs: making PyPi to PyPI ensuring no spelling errors | {
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"Hey pls review "
] | 2025-12-05T10:20:48 | 2025-12-10T14:16:31 | 2024-08-21T09:35:06 | NONE | null | null | false | {
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} | This PR adds a short clarification in the README section wherein PyPI the python package was mistakenly typed as PyPi which i have fixed
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https://api.github.com/repos/huggingface/datasets/issues/7897 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7897/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7897/comments | https://api.github.com/repos/huggingface/datasets/issues/7897/events | https://github.com/huggingface/datasets/pull/7897 | 3,691,300,022 | PR_kwDODunzps624-k2 | 7,897 | Save input shard lengths | {
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"The docs for this PR live [here](https://moon-ci-docs.huggingface.co/docs/datasets/pr_7897). All of your documentation changes will be reflected on that endpoint. The docs are available until 30 days after the last update."
] | 2025-12-03T17:56:55 | 2025-12-05T16:21:06 | 2025-12-05T16:21:03 | MEMBER | null | null | false | {
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"merged_at": "2025-12-05T16:21... | will be useful for the Viewer, to know what (original) shard each row belongs to
cc @cfahlgren1
next step is use it in Dataset Viewer and expose an API that returns the file containing the row at rowId
(took the opportunity to remove unusued code) | {
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https://api.github.com/repos/huggingface/datasets/issues/7896 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7896/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7896/comments | https://api.github.com/repos/huggingface/datasets/issues/7896/events | https://github.com/huggingface/datasets/pull/7896 | 3,688,480,675 | PR_kwDODunzps62vZtn | 7,896 | fix: force contiguous copy for sliced list arrays in embed_array_storage | {
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"The docs for this PR live [here](https://moon-ci-docs.huggingface.co/docs/datasets/pr_7896). All of your documentation changes will be reflected on that endpoint. The docs are available until 30 days after the last update.",
"Hi @The-Obstacle-Is-The-Way, I haven't had a chance to try your repro at https://github... | 2025-12-03T04:34:26 | 2025-12-19T16:45:54 | 2024-08-21T09:35:06 | CONTRIBUTOR | null | null | false | {
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} | ## Summary
Fixes SIGKILL crash in `embed_array_storage` when processing sliced/sharded datasets with nested types like `Sequence(Nifti())` or `Sequence(Image())`.
**Root cause**: When `ds.shard()` or `ds.select()` creates a sliced view, `array.values` on a sliced `ListArray` returns values with internal offset refere... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/7895 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7895/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7895/comments | https://api.github.com/repos/huggingface/datasets/issues/7895/events | https://github.com/huggingface/datasets/pull/7895 | 3,688,479,825 | PR_kwDODunzps62vZik | 7,895 | fix: use temp files in push_to_hub to prevent OOM on large datasets | {
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"Closing this PR.\n\nAfter further investigation (prompted by @lhoestq's feedback on #7893), I discovered that `free_memory=True` does work correctly - memory doesn't actually accumulate in the `additions` list as I originally thought.\n\nI tested standard `push_to_hub()` with 902 shards and it processed 625 shards... | 2025-12-03T04:33:55 | 2025-12-06T13:58:44 | 2025-12-05T22:47:50 | CONTRIBUTOR | null | null | false | {
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} | ## Summary
Fixes memory accumulation in `_push_parquet_shards_to_hub_single` that causes OOM when uploading large datasets with many shards.
**Root cause**: The current implementation stores ALL parquet shard bytes in memory via `BytesIO`, accumulating in the `additions` list. For N shards of ~300MB each, this requir... | {
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https://api.github.com/repos/huggingface/datasets/issues/7894 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7894/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7894/comments | https://api.github.com/repos/huggingface/datasets/issues/7894/events | https://github.com/huggingface/datasets/issues/7894 | 3,688,455,006 | I_kwDODunzps7b2Vte | 7,894 | embed_table_storage crashes (SIGKILL) on sharded datasets with Sequence() nested types | {
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"I wasn't able to reproduce the crash on my side (macos arm 54, pyarrow 22 and a nifti file I found [online](https://s3.amazonaws.com/openneuro.org/ds004884/sub-M2001/ses-1076/anat/sub-M2001_ses-1076_acq-tfl3_run-4_T1w.nii.gz?versionId=9aVGb3C.VcoBgxrhNzFnL6O0MvxQsXX7&AWSAccessKeyId=AKIARTA7OOV5WQ3DGSOB&Signature=L... | 2025-12-03T04:20:06 | 2025-12-06T13:10:34 | 2024-08-21T09:35:06 | CONTRIBUTOR | null | null | null | null | ## Summary
`embed_table_storage` crashes with SIGKILL (exit code 137) when processing sharded datasets containing `Sequence()` nested types like `Sequence(Nifti())`. Likely affects `Sequence(Image())` and `Sequence(Audio())` as well.
The crash occurs at the C++ level with no Python traceback.
### Related Issues
- #... | null | {
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"`preupload_lfs_files` removes the parquet bytes in `shard_addition` since the default is `free_memory=True`: it doesn't accumulate in memory. Can you check this is indeed the case, i.e. that `shard_addition.path_or_fileobj` is indeed empty ?",
"@lhoestq Thank you for pushing back on this and helping me understan... | 2025-12-03T04:19:34 | 2025-12-05T22:45:59 | 2025-12-05T22:44:16 | CONTRIBUTOR | null | null | null | null | ## Summary
Large dataset uploads crash or hang due to memory exhaustion. This appears to be the root cause of several long-standing issues.
### Related Issues
This is the root cause of:
- #5990 - Pushing a large dataset on the hub consistently hangs (46 comments, open since 2023)
- #7400 - 504 Gateway Timeout when u... | {
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