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https://api.github.com/repos/huggingface/datasets/issues/8170 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8170/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8170/comments | https://api.github.com/repos/huggingface/datasets/issues/8170/events | https://github.com/huggingface/datasets/pull/8170 | 4,372,102,391 | PR_kwDODunzps7XySvZ | 8,170 | fix(map): fix progress bar exceeding total when load_from_cache_file=False | {
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} | ## Summary
When `load_from_cache_file=False`, the progress bar in `Dataset.map()` displayed a count that exceeded the dataset size (e.g. "800 examples" for a 400-row dataset).
The bug: `pbar_initial` was computed using `len(existing_cache_files)`, which counts cache files on disk regardless of whether they would... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/8169 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8169/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8169/comments | https://api.github.com/repos/huggingface/datasets/issues/8169/events | https://github.com/huggingface/datasets/issues/8169 | 4,366,520,018 | I_kwDODunzps8AAAABBEPO0g | 8,169 | Streaming dataset hangs consistently | {
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When loading a dataset with `streaming=True`, some background process prevents the script from ever returning (or at least for a very long time).
This did not happen with `huggingface-hub < 1`.
### Steps to reproduce the bug
from datasets import load_dataset
ds = load_dataset("IRIIS-RESEARCH/N... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/8168 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8168/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8168/comments | https://api.github.com/repos/huggingface/datasets/issues/8168/events | https://github.com/huggingface/datasets/pull/8168 | 4,363,768,223 | PR_kwDODunzps7XYxf3 | 8,168 | docs(map): clarify that fn_kwargs yields a stable cache fingerprint vs closures | {
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} | ## Summary
When `Dataset.map()` or `Dataset.filter()` receives a closure that closes over an object containing non-deterministic state — for example a UUID, a random seed, or any mutable attribute of a class instance — `dill` serialises the **entire** captured object into the fingerprint. Two calls that are logically... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/8167 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8167/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8167/comments | https://api.github.com/repos/huggingface/datasets/issues/8167/events | https://github.com/huggingface/datasets/issues/8167 | 4,356,674,999 | I_kwDODunzps8AAAABA62Vtw | 8,167 | [BUG] Abnormal progress bar in dataset.map when load_from_cache_file=False | {
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datasets 4.8.5
```python
from datasets import load_dataset, load_from_disk
data = load_from_disk('pretrain_cached_dataset/train')
def dummy_map(example):
return example
dataset = data.map(dummy_map)
dataset = data.map(dummy_map, load_from_cache_file=True) ... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/8166 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8166/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8166/comments | https://api.github.com/repos/huggingface/datasets/issues/8166/events | https://github.com/huggingface/datasets/pull/8166 | 4,354,922,713 | PR_kwDODunzps7W8BUa | 8,166 | Fix storage_options lookup for streaming Lance datasets | {
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https://api.github.com/repos/huggingface/datasets/issues/8165 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8165/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8165/comments | https://api.github.com/repos/huggingface/datasets/issues/8165/events | https://github.com/huggingface/datasets/issues/8165 | 4,354,878,889 | I_kwDODunzps8AAAABA5ItqQ | 8,165 | IterableDataset: corrupted EXIF image silently terminates streaming iterator instead of skipping the sample | {
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When iterating over a streaming `IterableDataset` that contains images with corrupted EXIF metadata (e.g., a TIFF rational tag with denominator=0), PIL raises `ZeroDivisionError` inside `exif_transpose`. This exception propagates through the HuggingFace `datasets` pipeline and **terminates the streaming ite... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/8164 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8164/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8164/comments | https://api.github.com/repos/huggingface/datasets/issues/8164/events | https://github.com/huggingface/datasets/issues/8164 | 4,354,825,277 | I_kwDODunzps8AAAABA5FcPQ | 8,164 | Lance: HF auth token dropped for private repos in streaming mode (broken `storage_options` lookup) | {
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When `Lance._split_generators` receives `hf://` URIs - i.e. anywhere a `StreamingDownloadManager` is in play (`load_dataset(..., streaming=True)`, `get_dataset_split_names`, and the dataset-viewer worker) - the HF auth token is silently dropped before reaching `lance.dataset(...)`. Lance then atte... | {
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https://api.github.com/repos/huggingface/datasets/issues/8163 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8163/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8163/comments | https://api.github.com/repos/huggingface/datasets/issues/8163/events | https://github.com/huggingface/datasets/pull/8163 | 4,354,227,818 | PR_kwDODunzps7W5yDg | 8,163 | add agent trace prompt, sent_at, count fields | {
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} | - add agent trace metadata columns: `prompt`, `sent_at`, `num_user_messages`, and `num_tool_calls`.
- extract `prompt` / `sent_at` from the first real user message for Claude Code, Pi/OpenClaw, and Codex traces.
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https://api.github.com/repos/huggingface/datasets/issues/8162 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8162/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8162/comments | https://api.github.com/repos/huggingface/datasets/issues/8162/events | https://github.com/huggingface/datasets/pull/8162 | 4,353,153,600 | PR_kwDODunzps7W2QFE | 8,162 | Include all test files in sdist via MANIFEST.in | {
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} | Fixes #8159.
## What's wrong
The sdist on PyPI for `datasets==4.8.5` only ships **37 of the 95** files under `tests/`. Without an explicit `MANIFEST.in`, setuptools' default sdist behavior includes only top-level `tests/test_*.py` files and drops everything else.
Files missing from the current sdist:
- `tests/conft... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/8161 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8161/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8161/comments | https://api.github.com/repos/huggingface/datasets/issues/8161/events | https://github.com/huggingface/datasets/pull/8161 | 4,351,184,502 | PR_kwDODunzps7WvuJb | 8,161 | Pass library_name/version to HfApi in dataset push and delete paths | {
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https://api.github.com/repos/huggingface/datasets/issues/8160 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8160/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8160/comments | https://api.github.com/repos/huggingface/datasets/issues/8160/events | https://github.com/huggingface/datasets/pull/8160 | 4,349,215,301 | PR_kwDODunzps7WpIIx | 8,160 | feat: add TsFile (Apache IoTDB) packaged builder with per-device wide format | {
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## Summary
Add a packaged builder for [TsFile](https://tsfile.apache.org/) — the columnar time-series file format used as the native storage layer of [Apache IoTDB](https://iotdb.apache.org/). This enables `load_dataset("tsfile", data_files="...")` with automatic `.tsfile` extension detection.
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Version: 4.8.5
### Steps to reproduce the bug
n/a
### Expected behavior
n/a
### Environment info
n/a | null | {
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When `load_dataset()` falls back to the local cache, for example when offline or when the Hub is unreachable, it ignores the `revision` argument and simply returns the most recently modified cached version. This can lead to unexpected behavior when a specific revision is requested.
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- expand `~` before classifying local `data_files` patterns
- add a regression test covering `resolve_pattern(os.path.join("~", ...), ...)`
Impact
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kinda related: https://github.com/huggingface/datasets/issues/5717 | {
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] | open | false | [] | null | 2 | 2026-04-23T13:09:19 | 2026-04-24T14:14:59 | null | null | NONE | [] | null | null | null | null | ### Feature request
Modify the dataset loading initialization, so that fsspec filesystem instances (like GCSFileSystem or S3FileSystem) are instantiated once in the main thread and explicitly passed down to the background threads.
By pre-instantiating the fs object in the main thread (where the directory cache from g... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/8148 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8148/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8148/comments | https://api.github.com/repos/huggingface/datasets/issues/8148/events | https://github.com/huggingface/datasets/pull/8148 | 4,315,590,180 | PR_kwDODunzps7U9MrN | 8,148 | Add Apache Iceberg format support | {
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} | # Add Apache Iceberg format support
## Motivation
Apache Iceberg is the most widely adopted open table format for data lakes, supported by Databricks,
Snowflake, AWS Glue, Dremio, and others. A large amount of ML training data lives in Iceberg tables.
Currently, users must manually export Iceberg data t... | null | {
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Fixes: https://github.com/huggingface/datasets/issues/8145
## Root Cause
`FormattedExamplesIterable.__iter__` ignored `force_convert_to_python` and used Arrow batch iteration, advancing the
underlying state by a full Arrow chunk before yielding Python examples.
## Fix
Only use Arrow batch iteration whe... | {
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} | ## Summary
Fixes #8125.
`Dataset.map()` (and the indices writer in `Dataset.flatten_indices` / `Dataset.select` path) calls `os.chmod(cache_file, 0o666 & ~umask)` on the freshly moved cache file. On flat-permission filesystems — GCS FUSE, S3 FUSE mounts, and similar object-storage-backed mounts — `chmod` raises `Perm... | null | {
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After `ds.map(fn)` on a streaming IterableDataset, saving state_dict() and loading it into a fresh dataset does not resume at the correct position. It jumps forward by up to one Arrow read-chunk (~1000 rows).
### Steps to reproduce the bug
```python
from datasets import Dataset
ds1 = Dataset.fr... | {
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https://api.github.com/repos/huggingface/datasets/issues/8144 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8144/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8144/comments | https://api.github.com/repos/huggingface/datasets/issues/8144/events | https://github.com/huggingface/datasets/pull/8144 | 4,300,950,373 | PR_kwDODunzps7UNskE | 8,144 | Add Apache TsFile packaged module and Time Series docs category | {
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} | ## What does this PR do?
Adds first-class support for the [Apache TsFile](https://tsfile.apache.org/)
columnar time-series format (used by [Apache IoTDB](https://iotdb.apache.org/)
and other time-series systems) to 🤗 Datasets, and surfaces time-series
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cc: @merveenoyan | {
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} | Fixes #5354
Replaced `list` with `Sequence` in public API function signatures across:
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- `iterable_dataset.py` — from_csv, from_json, from_parquet, from_text
- `combine.py` — interleave_datasets, concatenate_datasets
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} | Add dynamic pyarrow storage type selection to the Image feature so that pa.large_binary() and pa.large_string() inputs are preserved natively instead of being cast down to pa.binary() / pa.string()
Introduce _get_target_pa_type() to detect large types from incoming storage and _to_struct_storage() to build struct arra... | {
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"merged_at": "2026-04-16T13:35... | otherwise it raises an issue from transformers smh
```
../../.pyenv/versions/3.12.2/envs/hf-datasets/lib/python3.12/site-packages/transformers/__init__.py:843: in _getattr
return getattr(importlib.import_module(target, __name__), new_name)
../../.pyenv/versions/3.12.2/lib/python3.12/importlib/__init__.py:90: ... | {
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} | Bump the pinned doc-builder SHA so that main documentation builds also sync to the HF bucket (dual-write).
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"merged_at": "2026-04-27T15:32... | **Motivation**:
There is a change in the approach to decoding JSON types, added in https://github.com/huggingface/datasets/commit/d560b58e1f1ec96591a95a1780ee118f5eea6c74. Since 4.7.0, to_list() returns raw JSON strings for columns stored as Json(), while direct access via getitem returns dicts.
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https://api.github.com/repos/huggingface/datasets/issues/8136 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8136/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8136/comments | https://api.github.com/repos/huggingface/datasets/issues/8136/events | https://github.com/huggingface/datasets/pull/8136 | 4,272,360,448 | PR_kwDODunzps7Sz4Iz | 8,136 | Remove print statement in JSON processing | {
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https://api.github.com/repos/huggingface/datasets/issues/8135 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8135/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8135/comments | https://api.github.com/repos/huggingface/datasets/issues/8135/events | https://github.com/huggingface/datasets/pull/8135 | 4,268,369,489 | PR_kwDODunzps7Sm752 | 8,135 | Add Zarr / OME-Zarr Dataset Support | {
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} | # Add Zarr / OME-Zarr Dataset Support
## TL;DR
This PR adds support for Zarr-backed datasets to `datasets`, with a focus on lazy, streaming-friendly access to large multidimensional arrays. It introduces a new `Zarr` feature, lazy proxy objects for arrays, groups, and OME-Zarr multiscale images, a `zarrfolder` pa... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/8134 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8134/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8134/comments | https://api.github.com/repos/huggingface/datasets/issues/8134/events | https://github.com/huggingface/datasets/pull/8134 | 4,267,351,322 | PR_kwDODunzps7SkBKa | 8,134 | chore: bump doc-builder SHA for PR upload workflow | {
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https://api.github.com/repos/huggingface/datasets/issues/8133 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8133/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8133/comments | https://api.github.com/repos/huggingface/datasets/issues/8133/events | https://github.com/huggingface/datasets/pull/8133 | 4,264,953,406 | PR_kwDODunzps7Sczz9 | 8,133 | use full repo-relative file path instead of filename for agent traces | {
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- Store the full repo-relative path in `file_name` instead of just the basename
- Extracts the path from the `hf://` origin URL set by the download manager
Before: `file_name = "614b8d50-097f-4e36-aee0-1fdd053335e7.js... | {
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https://api.github.com/repos/huggingface/datasets/issues/8132 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8132/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8132/comments | https://api.github.com/repos/huggingface/datasets/issues/8132/events | https://github.com/huggingface/datasets/pull/8132 | 4,260,846,283 | PR_kwDODunzps7SPyRm | 8,132 | fix(Dataset.map): initialize writer on first non-None output instead of first index | {
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} | ## What does this PR do?
Fixes #7990
## The Bug
When a map function returns `None` for the first examples and a dict for
later ones, `Dataset.map()` crashes with:
AttributeError: 'NoneType' object has no attribute 'write'
This happens because the ArrowWriter was initialized only when processing
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https://api.github.com/repos/huggingface/datasets/issues/8131 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8131/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8131/comments | https://api.github.com/repos/huggingface/datasets/issues/8131/events | https://github.com/huggingface/datasets/issues/8131 | 4,251,712,550 | I_kwDODunzps79a_wm | 8,131 | datasets.to_list: Behaviour change in version 4.7.0 with the addition of JSON type | {
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There is a change in the approach to decoding JSON types, added in https://github.com/huggingface/datasets/commit/d560b58e1f1ec96591a95a1780ee118f5eea6c74. Since 4.7.0, to_list() returns raw JSON strings for columns stored as Json(), while direct access via __getitem__ returns dicts.
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https://api.github.com/repos/huggingface/datasets/issues/8130 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8130/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8130/comments | https://api.github.com/repos/huggingface/datasets/issues/8130/events | https://github.com/huggingface/datasets/pull/8130 | 4,243,231,129 | PR_kwDODunzps7RoV2k | 8,130 | fix: mutable default argument in `_visit_with_path` | {
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} | Replace `visit_path: _VisitPath = []` with `Optional[_VisitPath] = None` to avoid the mutable default argument anti-pattern ([B006](https://docs.astral.sh/ruff/rules/mutable-argument-default/)).
While the current callers always use `visit_path + [k]` (creating new lists), the shared default list is a latent bug that w... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/8129 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8129/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8129/comments | https://api.github.com/repos/huggingface/datasets/issues/8129/events | https://github.com/huggingface/datasets/issues/8129 | 4,241,704,875 | I_kwDODunzps7800er | 8,129 | `load_dataset()` hangs when `hf_xet` is enabled | {
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Hi! I am getting a peculiar download issue on the latest versions of `datasets` and `hfh` where datasets hang indefinitely:
```py
from datasets import load_dataset
load_dataset("openai/gsm8k", "main", split="test")
```
Note that:
- streaming=True works.
- Direct Hub access works.
- Th... | {
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https://api.github.com/repos/huggingface/datasets/issues/8128 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8128/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8128/comments | https://api.github.com/repos/huggingface/datasets/issues/8128/events | https://github.com/huggingface/datasets/pull/8128 | 4,240,118,144 | PR_kwDODunzps7RfgVx | 8,128 | Don't include files list DatasetInfo (and remove old stuff) | {
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"merged_at": "2026-04-16T09:23... | this will fix the viewer when it saves the dataset info in mongo, for datasets with a lot of files this can make the mongo doc too big for mongo
I also removed old deprecated stuff linked to files list like the old concept of "post-processing" and cleaned the checksum recording logic | {
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https://api.github.com/repos/huggingface/datasets/issues/8127 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8127/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8127/comments | https://api.github.com/repos/huggingface/datasets/issues/8127/events | https://github.com/huggingface/datasets/pull/8127 | 4,225,755,698 | PR_kwDODunzps7Q23En | 8,127 | Support explicit harness field in agent traces | {
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} | Hi!
This small PR allows an optional `harness` field to be parsed.
When present, the harness field takes priority over type-value heuristics.
This allows agents to self-identify even when they contain property names that collide with an existing harness ("session", "system", etc.) | {
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https://api.github.com/repos/huggingface/datasets/issues/8126 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8126/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8126/comments | https://api.github.com/repos/huggingface/datasets/issues/8126/events | https://github.com/huggingface/datasets/pull/8126 | 4,224,718,927 | PR_kwDODunzps7Qz_UY | 8,126 | Fix batching for table-formatted datasets | {
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"merged_at": "2026-04-10T13:14... | ## Summary
Fix #8075
Fix `.batch()` on table-formatted `Dataset` and `IterableDataset`.
Before this change, calling `.batch()` on datasets formatted as `pyarrow`, `pandas`, or `polars` could fail because the batching path assumed dict-like inputs. This updates batching to use an Arrow-based path for table-style ... | {
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https://api.github.com/repos/huggingface/datasets/issues/8125 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8125/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8125/comments | https://api.github.com/repos/huggingface/datasets/issues/8125/events | https://github.com/huggingface/datasets/issues/8125 | 4,223,104,906 | I_kwDODunzps77t3eK | 8,125 | Feature request: being able to disable chmod for flat permission filesystems | {
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For flat permission file systems, `os.chmod` simply fails when trying to cache datasets - in some places such as: https://github.com/huggingface/datasets/blob/main/src/datasets/arrow_dataset.py#L4043-L4048 for arrow datasets.
This seems to be optional to obtained desired behavior as simply comment... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/8122 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8122/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8122/comments | https://api.github.com/repos/huggingface/datasets/issues/8122/events | https://github.com/huggingface/datasets/pull/8122 | 4,206,043,598 | PR_kwDODunzps7P_9lo | 8,122 | fix: decode Json() values before calling DataFrame.to_json() (#8116) | {
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"merged_at": "2026-04-10T13:12... | # Summary
fixes (https://github.com/huggingface/datasets/issues/8116)
Basically the issue is that if a dataset column uses Json() as a feature type, calling to_json() on that dataset causes a raw json escaped string to be exported, without decoding it first.
### root cause
`to_json` exports feature values in their... | {
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https://api.github.com/repos/huggingface/datasets/issues/8121 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8121/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8121/comments | https://api.github.com/repos/huggingface/datasets/issues/8121/events | https://github.com/huggingface/datasets/pull/8121 | 4,204,840,969 | PR_kwDODunzps7P9H7w | 8,121 | Fix Audio.cast_storage for CSV-loaded large_string columns | {
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} | ## Summary
This PR fixes `Audio.cast_storage()` so that audio path columns loaded as `large_string` can be cast to `Audio()` correctly.
## Motivation
`Dataset.from_dict({"audio": [...]})` produces a `string` column and `cast_column("audio", Audio())` works, but `load_dataset("csv", ...)` produces a `large_string` ... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/8120 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8120/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8120/comments | https://api.github.com/repos/huggingface/datasets/issues/8120/events | https://github.com/huggingface/datasets/issues/8120 | 4,201,197,701 | I_kwDODunzps76aTCF | 8,120 | Patch fields truncated — missing trailing newlines | {
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Affected instances (confirmed): atlanhq_atlan-python... | {
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https://api.github.com/repos/huggingface/datasets/issues/8116 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8116/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8116/comments | https://api.github.com/repos/huggingface/datasets/issues/8116/events | https://github.com/huggingface/datasets/issues/8116 | 4,197,189,620 | I_kwDODunzps76LAf0 | 8,116 | `to_json()` serializes `Json()` feature as escaped string instead of native JSON object | {
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When a dataset column uses the `Json()` feature type, calling `to_json()` writes the value as an escaped JSON string (e.g., `"{\"cat_a\":1,\"cat_b\":2}"`) instead of a native JSON object (e.g., `{"cat_a":1,"cat_b":2}`).
This causes two problems:
1. The output JSON file is not interoperable with ... | {
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https://api.github.com/repos/huggingface/datasets/issues/8115 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8115/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8115/comments | https://api.github.com/repos/huggingface/datasets/issues/8115/events | https://github.com/huggingface/datasets/pull/8115 | 4,195,114,404 | PR_kwDODunzps7PldtS | 8,115 | fix: preserve features in IterableDataset.add_column (fixes #5752) | {
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} | ## Summary
Fixes #5752.
`IterableDataset.add_column()` lost the dataset's feature schema on every call because it delegated to `map()` without passing the `features` argument. `map()` unconditionally writes `info.features = features`, so the default `None` silently overwrote the existing schema.
**Root cause** (`ite... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/8114 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8114/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8114/comments | https://api.github.com/repos/huggingface/datasets/issues/8114/events | https://github.com/huggingface/datasets/pull/8114 | 4,193,245,944 | PR_kwDODunzps7PgMNx | 8,114 | 🔒 Pin GitHub Actions to commit SHAs | {
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"merged_at": "2026-04-07T14:11... | ## 🔒 Pin GitHub Actions to commit SHAs
This PR pins all GitHub Actions to their exact commit SHA instead of mutable tags or branch names.
**Why?**
Pinning to a SHA prevents supply chain attacks where a tag (e.g. `v4`) could be moved to point to malicious code.
### Changes
| Workflow | Action | Avant | Après | SHA ... | {
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https://api.github.com/repos/huggingface/datasets/issues/8113 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8113/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8113/comments | https://api.github.com/repos/huggingface/datasets/issues/8113/events | https://github.com/huggingface/datasets/pull/8113 | 4,188,441,968 | PR_kwDODunzps7PUfD_ | 8,113 | Parse agent traces | {
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"merged_at": "2026-04-23T16:47... | Supports claude_code, codex and pi
JSON Lines files are parsed so one file = one row
The resulting row has three fields: harness, session_id, traces, and file_name with features:
```python
AGENT_TRACES_FEATURES = datasets.Features(
{
"harness": datasets.Value("string"),
"session_id": da... | {
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https://api.github.com/repos/huggingface/datasets/issues/8112 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8112/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8112/comments | https://api.github.com/repos/huggingface/datasets/issues/8112/events | https://github.com/huggingface/datasets/pull/8112 | 4,185,517,824 | PR_kwDODunzps7PMvUa | 8,112 | fix: replace List with Sequence in type hints for public API functions (#5354) | {
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} | ## Summary
Fixes #5354
Replaces `list[X]` with `Sequence[X]` in function argument type annotations
across the public API. `List` is invariant while `Sequence` is covariant,
which means passing a `list` to a parameter typed as `List` causes mypy errors,
even though lists are valid sequences.
## Changes
... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/8111 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8111/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8111/comments | https://api.github.com/repos/huggingface/datasets/issues/8111/events | https://github.com/huggingface/datasets/pull/8111 | 4,180,579,790 | PR_kwDODunzps7PAKZk | 8,111 | add sample_by="document" support for jsonl files | {
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} | With more agentic traces (_ie Claude Code / Codex / Pi etc_) being published to the Hub as JSONL files, it would be nice to easily support loading / viewing them in Dataset Viewer.
Datasets like https://huggingface.co/datasets/cfahlgren1/agent-sessions contain one JSONL file per session. Without sample_by, each lin... | {
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https://api.github.com/repos/huggingface/datasets/issues/8110 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8110/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8110/comments | https://api.github.com/repos/huggingface/datasets/issues/8110/events | https://github.com/huggingface/datasets/issues/8110 | 4,176,918,326 | I_kwDODunzps749rc2 | 8,110 | `set_format` resets features | {
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Calling `dataset.set_format('...')` resets the informative features such as `Array2D` etc. back into `List(List(Value))` and so on.
### Steps to reproduce the bug
```py
>>> dataset.features
{'lld': Array2D(shape=(None, 26), dtype='float32')}
>>> dataset.set_format('torch')
>>> dataset.features
... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/8109 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8109/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8109/comments | https://api.github.com/repos/huggingface/datasets/issues/8109/events | https://github.com/huggingface/datasets/pull/8109 | 4,170,661,589 | PR_kwDODunzps7Onjr6 | 8,109 | docs: fix typos, grammar, and branding consistency across docs and source | {
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} | This commit addresses several documentation quality issues found across the repository — fixing typos, grammar errors, brand name inconsistencies, and adding modern tooling references for new contributors.
## Changes
### README.md
- Fix duplicate word: "frameworks frameworks" → "frameworks"
- Standardize brand ... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/8107 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8107/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8107/comments | https://api.github.com/repos/huggingface/datasets/issues/8107/events | https://github.com/huggingface/datasets/pull/8107 | 4,146,270,390 | PR_kwDODunzps7N0KQH | 8,107 | Update WebDataset documentation link | {
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Closes #7699 | null | {
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https://api.github.com/repos/huggingface/datasets/issues/8106 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8106/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8106/comments | https://api.github.com/repos/huggingface/datasets/issues/8106/events | https://github.com/huggingface/datasets/pull/8106 | 4,141,989,496 | PR_kwDODunzps7Nowf0 | 8,106 | Fix: Add validation to prevent duplicate kwargs in load_dataset_builder | {
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Previously, passing identical keys caused a confusing Python `TypeError` during unpacking. This fix intercepts the duplicates early and raises a clear `ValueError` spec... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/8089 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8089/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8089/comments | https://api.github.com/repos/huggingface/datasets/issues/8089/events | https://github.com/huggingface/datasets/pull/8089 | 4,121,294,778 | PR_kwDODunzps7Ms4gk | 8,089 | set dev version | {
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https://api.github.com/repos/huggingface/datasets/issues/8085 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8085/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8085/comments | https://api.github.com/repos/huggingface/datasets/issues/8085/events | https://github.com/huggingface/datasets/issues/8085 | 4,120,101,624 | I_kwDODunzps71k8L4 | 8,085 | ImportError: cannot import name 'VideoReader' from 'torchvision.io' when using datasets with torch format | {
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For PyTorch 2.11 + torchvision 0.26.0 when using the datasets library and setting the format to "torch", an ImportError occurs because the datasets library attempts to import VideoReader from torchvision.io, but this object is not found in the installed torchvision version.
**Error message**:
> ... | {
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https://api.github.com/repos/huggingface/datasets/issues/8084 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8084/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8084/comments | https://api.github.com/repos/huggingface/datasets/issues/8084/events | https://github.com/huggingface/datasets/pull/8084 | 4,113,045,931 | PR_kwDODunzps7MYMNy | 8,084 | Add reshard support for JSON Lines and CSV file formats | {
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} | This PR extends the IterableDataset.reshard() functionality to support JSON Lines and CSV file formats, building on the foundation laid in #7992.
### Summary
- JSON Lines : Resharding splits files by line boundaries (only when num_shards is specified)
- CSV : Resharding splits files by line boundaries (only when n... | null | {
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I also took the opportunity to improve the arrow logic to not have to do an unnecessary python -> arrow -> python in FormattedExamplesIterable when streaming webdatasets | {
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This PR makes a minor change to the `cast_storage` method in the `Json` feature, updating its return type and documentation to better reflect its intended functionality.
* Updated the `cast_storage` method to return a `pa.JsonArray` instead of a `pa.Int64Array`, and revised t... | {
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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:
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related: https://github.com/apache/arrow/issues/9886 | {
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https://api.github.com/repos/huggingface/datasets/issues/8068 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8068/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8068/comments | https://api.github.com/repos/huggingface/datasets/issues/8068/events | https://github.com/huggingface/datasets/pull/8068 | 4,079,149,641 | PR_kwDODunzps7Kwbp4 | 8,068 | Datasets streaming iterable packaged fixes | {
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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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https://api.github.com/repos/huggingface/datasets/issues/8064 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8064/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8064/comments | https://api.github.com/repos/huggingface/datasets/issues/8064/events | https://github.com/huggingface/datasets/pull/8064 | 4,064,944,679 | PR_kwDODunzps7KDQH- | 8,064 | Read (and write) from HF Storage Buckets: load raw data, process and save to Dataset Repos | {
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"merged_at": "2026-03-16T15:45... | TODO:
- [x] load_dataset("csv", data_files=["hf://buckets/..."])
- [x] load_dataset("buckets/...")
- [x] Dataset.to_csv("hf://buckets/..."), to_json, to_parquet, etc.
- [x] DatasetDict.push_to_hub("buckets/...")
- [x] Dataset.push_to_hub("buckets/...")
- [x] DatasetDict.push_to_hub("buckets/...")
- [x] IterableD... | {
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https://api.github.com/repos/huggingface/datasets/issues/8063 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8063/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8063/comments | https://api.github.com/repos/huggingface/datasets/issues/8063/events | https://github.com/huggingface/datasets/pull/8063 | 4,064,033,042 | PR_kwDODunzps7KAPNO | 8,063 | Fix formatted iter arrow double yield | {
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"merged_at": "2026-03-17T00:06... | I (+Claude) noticed this when reading the code. I did not encounter this bug (I think) so I can't say much more about it. Perhaps the second iteration will immediately stop so the bug is harmless, but to be safe I think a return there is safer. | {
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https://api.github.com/repos/huggingface/datasets/issues/8062 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8062/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8062/comments | https://api.github.com/repos/huggingface/datasets/issues/8062/events | https://github.com/huggingface/datasets/pull/8062 | 4,064,013,989 | PR_kwDODunzps7KALNc | 8,062 | Fix iterable dataset dict num proc shards | {
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} | If the number of shards for some split is lower than num_proc the IterableDatasetDict.push_to_hub will crash.
This handling of num_proc is as close to identical as the handling in IterableDataset.push_to_hub | {
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https://api.github.com/repos/huggingface/datasets/issues/8061 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8061/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8061/comments | https://api.github.com/repos/huggingface/datasets/issues/8061/events | https://github.com/huggingface/datasets/pull/8061 | 4,058,881,349 | PR_kwDODunzps7JvjMu | 8,061 | fix reshard_data_sources | {
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https://api.github.com/repos/huggingface/datasets/issues/8060 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8060/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8060/comments | https://api.github.com/repos/huggingface/datasets/issues/8060/events | https://github.com/huggingface/datasets/pull/8060 | 4,058,653,460 | PR_kwDODunzps7Juyj9 | 8,060 | Improve error message for invalid data_files pattern format | {
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when an invalid data_files entry is provided.
The new message clearly explains the expected dictionary format:
{'split': <split_name>, 'path': <path_or_list_of_paths>}
This helps users debug incorrect dataset configurations more easily. | {
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https://api.github.com/repos/huggingface/datasets/issues/8059 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8059/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8059/comments | https://api.github.com/repos/huggingface/datasets/issues/8059/events | https://github.com/huggingface/datasets/pull/8059 | 4,047,389,910 | PR_kwDODunzps7JKln6 | 8,059 | set dev version | {
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https://api.github.com/repos/huggingface/datasets/issues/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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} | This PR introduces 3D mesh support to the `datasets` library, mirroring the existing paradigms for Image, Audio, and Video modalities. this is made to support 3D data just like image, audio, etc...
new `Mesh`feature class, which manages 3D data via a PyArrow `struct` containing both raw bytes and file paths. support... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/8054 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8054/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8054/comments | https://api.github.com/repos/huggingface/datasets/issues/8054/events | https://github.com/huggingface/datasets/pull/8054 | 4,042,146,910 | PR_kwDODunzps7I5elG | 8,054 | fix(arrow_dataset): initialise writer on first non-None map result, not on i==0 | {
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} | ## Summary
`Dataset.map` crashes with `AttributeError: 'NoneType' object has no attribute 'write'` when the map function returns `None` for the first N examples and a dict for later ones (issue #7990).
## Root Cause
The `ArrowWriter` was initialised with a guard tied to the example index:
```python
# Non-batched pa... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/8053 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8053/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8053/comments | https://api.github.com/repos/huggingface/datasets/issues/8053/events | https://github.com/huggingface/datasets/pull/8053 | 4,042,143,431 | PR_kwDODunzps7I5d8p | 8,053 | fix(iterable_dataset): preserve features when chaining filter() on typed IterableDataset | {
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"merged_at": "2026-03-09T17:44... | ## Summary
Chaining two `.filter()` calls on an `IterableDataset` with explicit features raises:
```
TypeError: 'NoneType' object is not a mapping
```
on the second `.filter()` call (issue #8037).
## Root Cause
After the first `.filter()`, the internal `ex_iterable` becomes _typed_ (`is_typed=True`) because `Filte... | {
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https://api.github.com/repos/huggingface/datasets/issues/8052 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8052/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8052/comments | https://api.github.com/repos/huggingface/datasets/issues/8052/events | https://github.com/huggingface/datasets/issues/8052 | 4,041,972,911 | I_kwDODunzps7w65yv | 8,052 | [Security] Zip/Rar/7z Archive Extraction Path Traversal (Incomplete CVE-2007-4559 Mitigation) | {
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**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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