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https://api.github.com/repos/huggingface/datasets/issues/8081 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8081/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8081/comments | https://api.github.com/repos/huggingface/datasets/issues/8081/events | https://github.com/huggingface/datasets/pull/8081 | 4,103,079,953 | PR_kwDODunzps7L6ktq | 8,081 | Fix split_dataset_by_node step | {
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I also took the opportunity to improve the arrow logic to not have to do an unnecessary python -> arrow -> python in FormattedExamplesIterable when streaming webdatasets | {
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This PR makes a minor change to the `cast_storage` method in the `Json` feature, updating its return type and documentation to better reflect its intended functionality.
* Updated the `cast_storage` method to return a `pa.JsonArray` instead of a `pa.Int64Array`, and revised t... | {
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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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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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related: https://github.com/apache/arrow/issues/9886 | {
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A collection of fixes and long-overdue feature completions that kept getting pushed off as TODO(QL) comments. Nothing here is a dramatic architectural change, mostly things that were partially wire... | {
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https://api.github.com/repos/huggingface/datasets/issues/8067 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8067/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8067/comments | https://api.github.com/repos/huggingface/datasets/issues/8067/events | https://github.com/huggingface/datasets/pull/8067 | 4,076,680,592 | PR_kwDODunzps7KpJ1W | 8,067 | typing: accept sequences for Dataset file loaders | {
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} | ## Summary
- update `Dataset.from_csv`, `from_json`, `from_parquet`, and `from_text` type hints from `list[PathLike]` to `Sequence[PathLike]`
- normalize non-string sequences to lists before passing paths to readers
- add path-type tests to cover tuple input for all four loaders
## Why
`list` is invariant for static t... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/8066 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8066/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8066/comments | https://api.github.com/repos/huggingface/datasets/issues/8066/events | https://github.com/huggingface/datasets/pull/8066 | 4,076,658,501 | PR_kwDODunzps7KpFze | 8,066 | fix: avoid duplicate kwargs collisions in load_dataset_builder | {
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} | ## Summary
- avoid duplicate keyword collisions when `config_kwargs` overlap with module-provided `builder_kwargs` in `load_dataset_builder`
- this fixes cases like passing `base_path=...` where `base_path` is already present in `builder_kwargs`
- add a regression test using a local dataset directory to ensure overridi... | {
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https://api.github.com/repos/huggingface/datasets/issues/8065 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8065/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8065/comments | https://api.github.com/repos/huggingface/datasets/issues/8065/events | https://github.com/huggingface/datasets/issues/8065 | 4,073,606,584 | I_kwDODunzps7yzk24 | 8,065 | ARM audio support broken | {
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`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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"merged_at": "2026-03-16T15:45... | TODO:
- [x] load_dataset("csv", data_files=["hf://buckets/..."])
- [x] load_dataset("buckets/...")
- [x] Dataset.to_csv("hf://buckets/..."), to_json, to_parquet, etc.
- [x] DatasetDict.push_to_hub("buckets/...")
- [x] Dataset.push_to_hub("buckets/...")
- [x] DatasetDict.push_to_hub("buckets/...")
- [x] IterableD... | {
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https://api.github.com/repos/huggingface/datasets/issues/8062 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8062/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8062/comments | https://api.github.com/repos/huggingface/datasets/issues/8062/events | https://github.com/huggingface/datasets/pull/8062 | 4,064,013,989 | PR_kwDODunzps7KALNc | 8,062 | Fix iterable dataset dict num proc shards | {
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} | If the number of shards for some split is lower than num_proc the IterableDatasetDict.push_to_hub will crash.
This handling of num_proc is as close to identical as the handling in IterableDataset.push_to_hub | {
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https://api.github.com/repos/huggingface/datasets/issues/8060 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8060/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8060/comments | https://api.github.com/repos/huggingface/datasets/issues/8060/events | https://github.com/huggingface/datasets/pull/8060 | 4,058,653,460 | PR_kwDODunzps7Juyj9 | 8,060 | Improve error message for invalid data_files pattern format | {
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when an invalid data_files entry is provided.
The new message clearly explains the expected dictionary format:
{'split': <split_name>, 'path': <path_or_list_of_paths>}
This helps users debug incorrect dataset configurations more easily. | {
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https://api.github.com/repos/huggingface/datasets/issues/8058 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8058/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8058/comments | https://api.github.com/repos/huggingface/datasets/issues/8058/events | https://github.com/huggingface/datasets/pull/8058 | 4,047,337,789 | PR_kwDODunzps7JKal1 | 8,058 | release: 4.7.0 | {
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https://api.github.com/repos/huggingface/datasets/issues/8057 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8057/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8057/comments | https://api.github.com/repos/huggingface/datasets/issues/8057/events | https://github.com/huggingface/datasets/pull/8057 | 4,047,214,377 | PR_kwDODunzps7JKAxA | 8,057 | Limit dataset listing to first 20 entries in readme | {
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https://api.github.com/repos/huggingface/datasets/issues/8056 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8056/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8056/comments | https://api.github.com/repos/huggingface/datasets/issues/8056/events | https://github.com/huggingface/datasets/pull/8056 | 4,046,814,417 | PR_kwDODunzps7JIr7d | 8,056 | Don't extract bad files | {
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https://api.github.com/repos/huggingface/datasets/issues/8055 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8055/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8055/comments | https://api.github.com/repos/huggingface/datasets/issues/8055/events | https://github.com/huggingface/datasets/pull/8055 | 4,042,507,479 | PR_kwDODunzps7I6knM | 8,055 | feat: add 3D mesh support and MeshFolder builder | {
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new `Mesh`feature class, which manages 3D data via a PyArrow `struct` containing both raw bytes and file paths. support... | {
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https://api.github.com/repos/huggingface/datasets/issues/8052 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8052/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8052/comments | https://api.github.com/repos/huggingface/datasets/issues/8052/events | https://github.com/huggingface/datasets/issues/8052 | 4,041,972,911 | I_kwDODunzps7w65yv | 8,052 | [Security] Zip/Rar/7z Archive Extraction Path Traversal (Incomplete CVE-2007-4559 Mitigation) | {
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**Reporter:** Conner Webber (conner.webber000@gmail.com)
**Severity:** HIGH (CVSS 3.1: 8.2)
**CWE:** CWE-22 (Improper Limitation of a Pathname to a Restricted Directory)
## Summary
The `ZipExtractor`, `RarExtractor`, and `SevenZipExtractor` classes in `datasets/utils/extract.py` call... | {
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https://api.github.com/repos/huggingface/datasets/issues/8051 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8051/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8051/comments | https://api.github.com/repos/huggingface/datasets/issues/8051/events | https://github.com/huggingface/datasets/pull/8051 | 4,038,763,775 | PR_kwDODunzps7Iu5aG | 8,051 | Add dtype property to Sequence, List, and LargeList (Fixes #8002) | {
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https://api.github.com/repos/huggingface/datasets/issues/8050 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8050/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8050/comments | https://api.github.com/repos/huggingface/datasets/issues/8050/events | https://github.com/huggingface/datasets/pull/8050 | 4,038,690,293 | PR_kwDODunzps7IurXm | 8,050 | Fix IterableDataset features being set to None on chained filter (Fixes #8037) | {
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} | This PR implements the solution suggested in #8037.
It updates the features argument in IterableDataset.filter() to preserve existing features when ex_iterable.is_typed is True. This prevents the TypeError: 'NoneType' object is not a mapping from being raised when chaining multiple .filter() calls. | {
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https://api.github.com/repos/huggingface/datasets/issues/8049 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8049/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8049/comments | https://api.github.com/repos/huggingface/datasets/issues/8049/events | https://github.com/huggingface/datasets/pull/8049 | 4,032,135,159 | PR_kwDODunzps7IZR_m | 8,049 | Fix typos in iterable_dataset.py | {
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https://api.github.com/repos/huggingface/datasets/issues/8048 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8048/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8048/comments | https://api.github.com/repos/huggingface/datasets/issues/8048/events | https://github.com/huggingface/datasets/issues/8048 | 4,031,613,102 | I_kwDODunzps7wTYiu | 8,048 | Support 3D Datasets | {
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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/8047 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8047/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8047/comments | https://api.github.com/repos/huggingface/datasets/issues/8047/events | https://github.com/huggingface/datasets/pull/8047 | 4,030,434,134 | PR_kwDODunzps7IUKWg | 8,047 | fix: handle nested null types in feature alignment for multi-proc map | {
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"merged_at": "2026-03-09T17:52... | When using `Dataset.map()` with `num_proc > 1`, shards containing only empty lists get their features inferred as `List(Value('null'))`, which is incompatible with `List(Struct({...}))` from shards with actual data.
The existing `_check_if_features_can_be_aligned` and `_align_features` only handled top-level `Value(... | {
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https://api.github.com/repos/huggingface/datasets/issues/8046 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8046/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8046/comments | https://api.github.com/repos/huggingface/datasets/issues/8046/events | https://github.com/huggingface/datasets/issues/8046 | 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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When using `Dataset.map()` with `num_proc > 1`, if the map function produces a list column where some shards contain only empty lists `[]` and other shards contain non-empty lists of structs, the feature type inference is inconsistent across shards:
- Shards with only empty lists → `List(Value('n... | {
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https://api.github.com/repos/huggingface/datasets/issues/8045 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8045/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8045/comments | https://api.github.com/repos/huggingface/datasets/issues/8045/events | https://github.com/huggingface/datasets/pull/8045 | 4,028,881,818 | PR_kwDODunzps7IPA1N | 8,045 | Write IterableDataset to parquet incrementally instead of materializing entire shard in memory | {
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} | `IterableDataset.to_parquet()` materialized the entire shard into memory via
`pa.concat_tables(list(...))` before writing. For datasets with large shards and multiprocessing (push_to_hub with num_proc > 0) the memory requirements can be really large.
This PR writes parquet incrementally by iterating Arrow batches a... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/8044 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8044/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8044/comments | https://api.github.com/repos/huggingface/datasets/issues/8044/events | https://github.com/huggingface/datasets/pull/8044 | 4,028,042,275 | PR_kwDODunzps7IMNl4 | 8,044 | Fix silent data loss in push_to_hub when num_proc > num_shards | {
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"merged_at": "2026-03-09T17:22... | ## Summary
When `num_proc` exceeds the number of output shards in `Dataset.push_to_hub`, workers
without assigned output shards silently drop their data. The metadata still reports the
correct dataset length (using `len(self[split])`), masking the data loss.
This fix caps `num_jobs` at `num_shards` in `_push_pa... | {
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https://api.github.com/repos/huggingface/datasets/issues/8043 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8043/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8043/comments | https://api.github.com/repos/huggingface/datasets/issues/8043/events | https://github.com/huggingface/datasets/pull/8043 | 4,027,936,170 | PR_kwDODunzps7IL3IJ | 8,043 | Add features parameter to IterableDatasetDict.map | {
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https://api.github.com/repos/huggingface/datasets/issues/8042 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8042/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8042/comments | https://api.github.com/repos/huggingface/datasets/issues/8042/events | https://github.com/huggingface/datasets/pull/8042 | 4,027,903,841 | PR_kwDODunzps7ILwT5 | 8,042 | Fix schema enforcement in streaming _convert_to_arrow | {
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https://api.github.com/repos/huggingface/datasets/issues/8041 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8041/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8041/comments | https://api.github.com/repos/huggingface/datasets/issues/8041/events | https://github.com/huggingface/datasets/pull/8041 | 4,027,152,089 | PR_kwDODunzps7IJPKo | 8,041 | Use num_examples instead of len(self) for iterable_dataset's SplitInfo | {
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https://api.github.com/repos/huggingface/datasets/issues/8040 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8040/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8040/comments | https://api.github.com/repos/huggingface/datasets/issues/8040/events | https://github.com/huggingface/datasets/pull/8040 | 4,025,912,223 | PR_kwDODunzps7IFFnG | 8,040 | Fix the logic for allowed extensions when creating build configurations (#8034) | {
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https://api.github.com/repos/huggingface/datasets/issues/8039 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8039/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8039/comments | https://api.github.com/repos/huggingface/datasets/issues/8039/events | https://github.com/huggingface/datasets/pull/8039 | 4,025,811,123 | PR_kwDODunzps7IEv9Z | 8,039 | Fix non-deterministic by sorting metadata extensions (#8034) | {
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https://api.github.com/repos/huggingface/datasets/issues/8038 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8038/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8038/comments | https://api.github.com/repos/huggingface/datasets/issues/8038/events | https://github.com/huggingface/datasets/issues/8038 | 4,020,184,168 | I_kwDODunzps7vnyRo | 8,038 | Typo in iterable_dataset.py | {
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`streaming=True**kwargs,` should be `streaming=True, **kwargs,`
https://github.com/huggingface/datasets/blob/81027be09d5cd9f06a6d64ef1a8a3e9ebd0f86fd/src/datasets/iterable_dataset.py#L2950
### Steps to reproduce the bug
```
from Datasets import Dataset
IterableDataset.from_csv("file.csv")
```
#... | {
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https://api.github.com/repos/huggingface/datasets/issues/8037 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8037/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8037/comments | https://api.github.com/repos/huggingface/datasets/issues/8037/events | https://github.com/huggingface/datasets/issues/8037 | 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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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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https://api.github.com/repos/huggingface/datasets/issues/8036 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8036/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8036/comments | https://api.github.com/repos/huggingface/datasets/issues/8036/events | https://github.com/huggingface/datasets/pull/8036 | 4,006,914,206 | PR_kwDODunzps7HHMKn | 8,036 | follow `cache_dir` in download option when loading datasets | {
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https://api.github.com/repos/huggingface/datasets/issues/8035 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8035/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8035/comments | https://api.github.com/repos/huggingface/datasets/issues/8035/events | https://github.com/huggingface/datasets/pull/8035 | 4,005,673,675 | PR_kwDODunzps7HDPtk | 8,035 | Update links in README to use markdown format | {
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https://api.github.com/repos/huggingface/datasets/issues/8034 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8034/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8034/comments | https://api.github.com/repos/huggingface/datasets/issues/8034/events | https://github.com/huggingface/datasets/issues/8034 | 4,004,188,523 | I_kwDODunzps7uqxFr | 8,034 | [BUG] load_datasets() cannot use the generated Arrow cache correctly | {
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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... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/8033 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8033/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8033/comments | https://api.github.com/repos/huggingface/datasets/issues/8033/events | https://github.com/huggingface/datasets/pull/8033 | 4,003,917,950 | PR_kwDODunzps7G-QP1 | 8,033 | perf: use deque for async map task/index queues | {
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} | ## Problem
`arrow_dataset.py` and `iterable_dataset.py` drain `indices` and `tasks` lists front-to-back via `.pop(0)` during parallel async map operations. With `MAX_NUM_RUNNING_ASYNC_MAP_FUNCTIONS_IN_PARALLEL` items in flight, each `.pop(0)` is **O(n)** making the drain loop **O(n²)**.
## Solution
Switch both `indi... | {
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https://api.github.com/repos/huggingface/datasets/issues/8032 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8032/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8032/comments | https://api.github.com/repos/huggingface/datasets/issues/8032/events | https://github.com/huggingface/datasets/pull/8032 | 4,003,285,460 | PR_kwDODunzps7G8PQ8 | 8,032 | set dev version | {
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https://api.github.com/repos/huggingface/datasets/issues/8030 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8030/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8030/comments | https://api.github.com/repos/huggingface/datasets/issues/8030/events | https://github.com/huggingface/datasets/pull/8030 | 4,003,238,887 | PR_kwDODunzps7G8F4x | 8,030 | Remove tmp file in push to hub | {
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https://api.github.com/repos/huggingface/datasets/issues/8029 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8029/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8029/comments | https://api.github.com/repos/huggingface/datasets/issues/8029/events | https://github.com/huggingface/datasets/issues/8029 | 4,001,742,455 | I_kwDODunzps7uhb53 | 8,029 | `cache_dir` option in `download_config` in `load_dataset` is not respected | {
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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
'''
... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/8028 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8028/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8028/comments | https://api.github.com/repos/huggingface/datasets/issues/8028/events | https://github.com/huggingface/datasets/pull/8028 | 4,000,313,779 | PR_kwDODunzps7GybfA | 8,028 | Fix torchcodec audio decoding to respect 'num_channels' | {
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} | Fixes torchcodec audio decoding when `num_channels` is set on `Audio`.
Before this change, `AudioDecoder["array"]` reduced multi-channel audio to mono by averaging channels, so the requested channel behavior was not respected.
With this PR:
- multi-channel decoded arrays are preserved by default;
- mono output ... | null | {
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Examples of supported tool-calling / dataclaw datase... | {
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https://api.github.com/repos/huggingface/datasets/issues/8025 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8025/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8025/comments | https://api.github.com/repos/huggingface/datasets/issues/8025/events | https://github.com/huggingface/datasets/pull/8025 | 3,989,040,394 | PR_kwDODunzps7GNSUF | 8,025 | release: 4.6.0 | {
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https://api.github.com/repos/huggingface/datasets/issues/8024 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8024/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8024/comments | https://api.github.com/repos/huggingface/datasets/issues/8024/events | https://github.com/huggingface/datasets/pull/8024 | 3,983,877,502 | PR_kwDODunzps7F8QeB | 8,024 | Allow import polars in map() | {
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https://api.github.com/repos/huggingface/datasets/issues/8023 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8023/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8023/comments | https://api.github.com/repos/huggingface/datasets/issues/8023/events | https://github.com/huggingface/datasets/pull/8023 | 3,983,829,205 | PR_kwDODunzps7F8GUT | 8,023 | Support empty shard in from_generator | {
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https://api.github.com/repos/huggingface/datasets/issues/8022 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8022/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8022/comments | https://api.github.com/repos/huggingface/datasets/issues/8022/events | https://github.com/huggingface/datasets/pull/8022 | 3,983,057,516 | PR_kwDODunzps7F5eYs | 8,022 | fix: resolve base_path conflict between builder_kwargs and config_kwargs | {
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} | ## What does this PR fix?
This PR fixes a bug where passing `base_path` to `load_dataset_builder()` or `load_dataset()` causes a TypeError because both `builder_kwargs` and `config_kwargs` can contain the same key.
## Problem
When users call:
```python
from datasets import load_dataset
load_dataset("rotten_tomatoes"... | {
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https://api.github.com/repos/huggingface/datasets/issues/8021 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8021/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8021/comments | https://api.github.com/repos/huggingface/datasets/issues/8021/events | https://github.com/huggingface/datasets/pull/8021 | 3,981,426,772 | PR_kwDODunzps7F0FmV | 8,021 | progress bar optional manual control | {
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} | Fix: https://github.com/huggingface/datasets/issues/7939
Summary
The default behavior for the progress bar has been adjusted based on dataset size. It remains enabled for small datasets and is automatically disabled for larger datasets to improve performance. Users retain full control and can explicitly enable or... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/8020 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8020/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8020/comments | https://api.github.com/repos/huggingface/datasets/issues/8020/events | https://github.com/huggingface/datasets/pull/8020 | 3,977,114,662 | PR_kwDODunzps7Fl8mj | 8,020 | feat: add return_file_name support to Parquet packaged builder | {
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} | Part of #5806. Extends the `return_file_name` feature (implemented for JSON in #7948 and CSV in #8019) to the Parquet packaged builder. When `return_file_name=True`, a `file_name` column containing the source file basename is appended to each batch. | null | {
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https://api.github.com/repos/huggingface/datasets/issues/8019 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8019/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8019/comments | https://api.github.com/repos/huggingface/datasets/issues/8019/events | https://github.com/huggingface/datasets/pull/8019 | 3,977,073,546 | PR_kwDODunzps7Flz15 | 8,019 | feat: add return_file_name support to CSV packaged builder | {
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} | ## Summary
- Adds an optional `return_file_name: bool = False` parameter to `CsvConfig`
- When `return_file_name=True`, a `file_name` column is appended to every batch in `_generate_tables`, containing the basename of the source CSV file for each row
- Default is `False`, preserving full backward compatibility
## Mot... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/8017 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8017/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8017/comments | https://api.github.com/repos/huggingface/datasets/issues/8017/events | https://github.com/huggingface/datasets/pull/8017 | 3,975,274,092 | PR_kwDODunzps7FgERR | 8,017 | Improve error message for deprecated dataset scripts with migration guidance | {
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} | Summary
This PR improves the RuntimeError message raised when deprecated local dataset scripts are detected.
Previously, the error message:
"Dataset scripts are no longer supported"
did not provide actionable migration guidance.
Improvements
- Clarifies the new architecture
- Provides explicit migration step... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/8016 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8016/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8016/comments | https://api.github.com/repos/huggingface/datasets/issues/8016/events | https://github.com/huggingface/datasets/pull/8016 | 3,974,759,572 | PR_kwDODunzps7FecuC | 8,016 | Remove legacy Sphinx roles from docstrings | {
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} | ## Summary
Replace all remaining `:obj:`, `:class:`, `:func:`, and `:meth:` Sphinx cross-reference roles with plain backtick references, aligning with the project's current documentation conventions.
**14 files, 71 replacements. No logic changes.**
## Context
As noted in #5324, the codebase had a mix of old Sphinx ... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/8015 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8015/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8015/comments | https://api.github.com/repos/huggingface/datasets/issues/8015/events | https://github.com/huggingface/datasets/issues/8015 | 3,974,281,900 | I_kwDODunzps7s4rqs | 8,015 | Iterating a streaming dataset correctly in random order | {
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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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https://api.github.com/repos/huggingface/datasets/issues/8014 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8014/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8014/comments | https://api.github.com/repos/huggingface/datasets/issues/8014/events | https://github.com/huggingface/datasets/pull/8014 | 3,972,099,737 | PR_kwDODunzps7FV93G | 8,014 | Speed up local 'get_data_patterns' by avoiding repeated recursive scans | {
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} | This PR speeds up `get_data_patterns` for local paths.
### Problem
For `load_dataset("imagefolder", data_dir=...)`, `get_data_patterns` was repeatedly scanning the same local directory tree for many split patterns (`train`, `test`, etc.).
With large folders, this became very slow. This has also been reported b... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/8013 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8013/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8013/comments | https://api.github.com/repos/huggingface/datasets/issues/8013/events | https://github.com/huggingface/datasets/pull/8013 | 3,964,156,070 | PR_kwDODunzps7E8Ovb | 8,013 | Add space between sentences 'operation.To debug' | {
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} | Previously the exception message would read "...abruptly died during map _operation.To_ debug the error...".
The `operation.To` part would actually render as a hyperlink when printed to Slack. | null | {
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https://api.github.com/repos/huggingface/datasets/issues/8012 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8012/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8012/comments | https://api.github.com/repos/huggingface/datasets/issues/8012/events | https://github.com/huggingface/datasets/issues/8012 | 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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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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https://api.github.com/repos/huggingface/datasets/issues/8011 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8011/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8011/comments | https://api.github.com/repos/huggingface/datasets/issues/8011/events | https://github.com/huggingface/datasets/pull/8011 | 3,963,479,811 | PR_kwDODunzps7E59Pn | 8,011 | fix: condition for file_name feature check | {
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} | ## Description
Accept `Value("large_string")` in addition to `Value("string")` for the `file_name` (or `*_file_name`) metadata key in folder-based builders (e.g. `audiofolder`).
## Problem
When loading a dataset with `load_dataset("audiofolder", data_dir=...)` and a `metadata.csv` file, the metadata schema is infe... | {
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https://api.github.com/repos/huggingface/datasets/issues/8010 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8010/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8010/comments | https://api.github.com/repos/huggingface/datasets/issues/8010/events | https://github.com/huggingface/datasets/issues/8010 | 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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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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https://api.github.com/repos/huggingface/datasets/issues/8009 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8009/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8009/comments | https://api.github.com/repos/huggingface/datasets/issues/8009/events | https://github.com/huggingface/datasets/pull/8009 | 3,958,228,652 | PR_kwDODunzps7Eo7KV | 8,009 | More IterableDataset.from_x methods and docs and polars.Lazyframe support | {
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https://api.github.com/repos/huggingface/datasets/issues/8008 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8008/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8008/comments | https://api.github.com/repos/huggingface/datasets/issues/8008/events | https://github.com/huggingface/datasets/pull/8008 | 3,948,857,401 | PR_kwDODunzps7EJ_oM | 8,008 | fix: prevent duplicate keywords in load_dataset_builder (#4910) | {
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https://api.github.com/repos/huggingface/datasets/issues/8007 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8007/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8007/comments | https://api.github.com/repos/huggingface/datasets/issues/8007/events | https://github.com/huggingface/datasets/issues/8007 | 3,946,695,329 | I_kwDODunzps7rPcqh | 8,007 | Add option for loading audio with video | {
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Currently, `torchcodec` don't allow extracting `Audio` from `Video` https://github.com/meta-pytorch/torchcodec/issues/1158, but when I upload videos with audio to hub using `videofolder`, then this is not possible to retrieve audio from it. Probably `VideoDecoder` can be extended with `audio` para... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/8006 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8006/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8006/comments | https://api.github.com/repos/huggingface/datasets/issues/8006/events | https://github.com/huggingface/datasets/issues/8006 | 3,944,394,074 | I_kwDODunzps7rGq1a | 8,006 | Regression: from_generator crashes if one generator call returns no results | {
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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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https://api.github.com/repos/huggingface/datasets/issues/8005 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8005/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8005/comments | https://api.github.com/repos/huggingface/datasets/issues/8005/events | https://github.com/huggingface/datasets/issues/8005 | 3,941,908,297 | I_kwDODunzps7q9L9J | 8,005 | Multi-channel audio is automatically cast to mono, num_channels is ignored | {
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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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https://api.github.com/repos/huggingface/datasets/issues/8004 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8004/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8004/comments | https://api.github.com/repos/huggingface/datasets/issues/8004/events | https://github.com/huggingface/datasets/pull/8004 | 3,939,675,475 | PR_kwDODunzps7DsCBM | 8,004 | fix save_to_disk/load_from_disk with pathlib.Path input | {
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} | Since #6704, `save_to_disk` and `load_from_disk` use `fsspec.core.url_to_fs` which expects a `str`, but both methods accept `PathLike` (which includes `pathlib.Path`). Passing a `Path` object raises a `TypeError` because `url_to_fs` can't handle it.
Fixed by converting the path argument with `os.fspath()` before handi... | {
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https://api.github.com/repos/huggingface/datasets/issues/8003 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8003/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8003/comments | https://api.github.com/repos/huggingface/datasets/issues/8003/events | https://github.com/huggingface/datasets/pull/8003 | 3,938,501,557 | PR_kwDODunzps7DoBmp | 8,003 | very basic support for more hf urls | {
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https://api.github.com/repos/huggingface/datasets/issues/8002 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8002/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8002/comments | https://api.github.com/repos/huggingface/datasets/issues/8002/events | 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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**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/8000 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8000/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8000/comments | https://api.github.com/repos/huggingface/datasets/issues/8000/events | https://github.com/huggingface/datasets/pull/8000 | 3,919,504,253 | PR_kwDODunzps7CpK9i | 8,000 | Fix: make environment variable naming consistent (issue #7998) | {
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"merged_at": "2026-02-16T15:29... | Fix: https://github.com/huggingface/datasets/issues/7998
**Summary**
Addressed the inconsistent environment variable name HF_DATASETS_DISABLE_PROGRESS_BARS used for toggling progress bars, particularly in docstrings and warning messages.
**Changes**
Updated function docstrings to use the correct environment... | {
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https://api.github.com/repos/huggingface/datasets/issues/7999 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7999/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7999/comments | https://api.github.com/repos/huggingface/datasets/issues/7999/events | https://github.com/huggingface/datasets/issues/7999 | 3,915,367,642 | I_kwDODunzps7pX8Ta | 7,999 | Too many dataloader workers: 4 (max is dataset.num_shards=3). Stopping 1 dataloader workers. | {
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I’m working on training with a large-scale dataset (100+ Parquet files) using lazy loading, and I’m struggling to understand/optimize the num_shards setting— in the lerobot repo: streaming_datasets.py:
```
from datasets import load_dataset
self.hf_dataset: datasets.IterableDataset = load_dataset(
self.... | null | {
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https://github.com/huggingface/datasets/blob/025593f2f0722f31fc136e0ae45da4ff44d4416a/src/datasets/config.py#L221-L226
Docstrings and warnings report env var name `HF_DATASETS_DISABLE_PROGRESS_BAR` without the ending `S`.
https://github.com/huggingface/data... | {
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https://api.github.com/repos/huggingface/datasets/issues/7997 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7997/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7997/comments | https://api.github.com/repos/huggingface/datasets/issues/7997/events | https://github.com/huggingface/datasets/pull/7997 | 3,912,160,109 | PR_kwDODunzps7CRNIl | 7,997 | fix: Dataset.map writer initialization when first examples return None | {
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} | Fixes #7990
## Summary
When Dataset.map is called and the first examples processed return None, the writer is never properly initialized, causing a ValueError.
## Changes
- Modified _map_single to initialize the writer early if the first batch returns empty results
- Ensures writer is set before the first call to w... | {
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Fixes #7990
This PR fixes a bug in `Dataset.map()` where the writer initialization was incorrectly tied to the index being 0, causing crashes when the map function returns `None` for the first few examples and later returns a dict.
### Changes
- **Non-batched mode** (line 3676): Changed from `if i == 0:... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/7995 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7995/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7995/comments | https://api.github.com/repos/huggingface/datasets/issues/7995/events | https://github.com/huggingface/datasets/pull/7995 | 3,912,055,867 | PR_kwDODunzps7CQ4C9 | 7,995 | Bump fsspec upper bound to 2026.2.0 (fixes #7994) | {
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https://api.github.com/repos/huggingface/datasets/issues/7994 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7994/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7994/comments | https://api.github.com/repos/huggingface/datasets/issues/7994/events | https://github.com/huggingface/datasets/issues/7994 | 3,906,330,806 | I_kwDODunzps7o1eC2 | 7,994 | Bump fsspec upper bound constraint | {
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I saw you had some API compat issues in the past (https://github.com/huggingface/datasets/issues/7326) and I understand the need for an upper bound.
But I wonder if you think your CI and tests are a good proxy to catch fsspec API breakage? If t... | {
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} | This PR introduces a new dataset builder, SparseCsv, designed to handle "wide" tabular datasets (e.g., 100k+ columns common in transcriptomics, sparse NLP features, or recommender systems) that are typically too large to load into memory as dense Arrow tables.
It also adds a utility function, `sparse_collate_fn`, to... | null | {
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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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"merged_at": "2026-02-04T18:55... | To increase the number of shards of a dataset, you can use [`IterableDataset.reshard`]:
```py
>>> dataset
IterableDataset({
features: ['label', 'title', 'content'],
num_shards: 4
})
>>> dataset.reshard()
IterableDataset({
features: ['label', 'title', 'content'],
num_shards: 3600
})
```
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```
from huggingface_hub import HfApi
a... | {
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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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"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... | {
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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. | {
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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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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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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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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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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... | {
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this is enabled for for datasets loaded using streaming=True/False | {
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https://api.github.com/repos/huggingface/datasets/issues/7978 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7978/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7978/comments | https://api.github.com/repos/huggingface/datasets/issues/7978/events | https://github.com/huggingface/datasets/pull/7978 | 3,879,787,436 | PR_kwDODunzps7AmQfP | 7,978 | Fix 4910 kwargs | {
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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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