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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... | null | {
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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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## 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... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/7996 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7996/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7996/comments | https://api.github.com/repos/huggingface/datasets/issues/7996/events | https://github.com/huggingface/datasets/pull/7996 | 3,912,066,322 | PR_kwDODunzps7CQ6GC | 7,996 | Fix Dataset.map writer initialization when early examples return None | {
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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... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/7993 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7993/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7993/comments | https://api.github.com/repos/huggingface/datasets/issues/7993/events | https://github.com/huggingface/datasets/pull/7993 | 3,898,606,021 | PR_kwDODunzps7Bkr3F | 7,993 | :sparkles: Add 'SparseCsv' builder and 'sparse_collate_fn' for efficient high-dimensional sparse data loading | {
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It also adds a utility function, `sparse_collate_fn`, to... | null | {
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"The docs for this PR live [here](/static-proxy?url=https%3A%2F%2Fmoon-ci-docs.huggingface.co%2Fdocs%2Fdatasets%2Fpr_7992). All of your documentation changes will be reflected on that endpoint. The docs are available until 30 days after the last update."
] | 2026-02-04T18:24:41 | 2026-02-04T18:55:38 | 2026-02-04T18:55:35 | MEMBER | null | null | null | null | 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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} | i am using the python api wrapper to list all datasets available on hugging face. This is for research, and i need all datasets to determine which % have language tags and other related questions requiring the total list. However, the following code that worked a few months ago:
```
from huggingface_hub import HfApi
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} | ### Describe the bug
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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] | 2026-02-04T09:42:49 | 2026-02-04T15:20:04 | 2026-02-04T15:20:02 | CONTRIBUTOR | null | null | null | null | 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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} | ### Describe the bug
# Repro
These two conditions seem to consistently reproduce the issue:
- function passed to `Dataset.map()` explicitly or implicitly calls `import polars as pl`
- `num_proc` > 1
# Trace
```
RemoteTraceback Traceback (most recent call last)
RemoteTraceback:
"""
Traceback... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/7987 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7987/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7987/comments | https://api.github.com/repos/huggingface/datasets/issues/7987/events | https://github.com/huggingface/datasets/pull/7987 | 3,894,713,494 | PR_kwDODunzps7BX0pY | 7,987 | Fix index out of bound error with original_shard_lengths. | {
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```
original_shard_lengths[original_shard_id] += 1
~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^
IndexError: list index out of range
```
Not sure what causes it, but this fixes the error. This may not be the proper fix for the root cause though. | null | {
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https://api.github.com/repos/huggingface/datasets/issues/7986 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7986/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7986/comments | https://api.github.com/repos/huggingface/datasets/issues/7986/events | https://github.com/huggingface/datasets/issues/7986 | 3,892,776,651 | I_kwDODunzps7oBw7L | 7,986 | `Dataset.map()` causes cache miss/fingerprint change when closure captures self containing non-deterministic state. | {
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"I suggest metion this in docs specifically for attention with use, tell users explicitly to pass arguments with `fn_kwargs` param or using `functools.partial` to create a pure funcion."
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} | ### Describe the bug
When using `.map()` with a function defined inside a **class (of which has any non-deterministic states)** method (a closure), if that function captures `self` to access a configuration variable (e.g., self.foo), the fingerprint mechanism serializes the entire class instance state.
If the class i... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/7985 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7985/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7985/comments | https://api.github.com/repos/huggingface/datasets/issues/7985/events | https://github.com/huggingface/datasets/pull/7985 | 3,892,480,150 | PR_kwDODunzps7BQaGn | 7,985 | Remove unused data files optims | {
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] | 2026-02-03T17:58:30 | 2026-02-03T18:30:30 | 2026-02-03T18:30:28 | MEMBER | null | null | null | null | this fixes module inference when there are many metadata files
e.g. the lance dataset at https://huggingface.co/datasets/davanstrien/encyclopaedia-britannica-lance has > 200 metadata files
those optims are not used anymore, they come from a time we were dealing with slow data files iterators instead of lists | {
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https://api.github.com/repos/huggingface/datasets/issues/7983 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7983/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7983/comments | https://api.github.com/repos/huggingface/datasets/issues/7983/events | https://github.com/huggingface/datasets/pull/7983 | 3,888,225,779 | PR_kwDODunzps7BCJgV | 7,983 | Add Zarr streaming support (POC) | {
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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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https://api.github.com/repos/huggingface/datasets/issues/7982 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7982/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7982/comments | https://api.github.com/repos/huggingface/datasets/issues/7982/events | https://github.com/huggingface/datasets/pull/7982 | 3,888,131,856 | PR_kwDODunzps7BB1zZ | 7,982 | Fix unstable tokenizer fingerprinting (enables map cache reuse) | {
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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... | null | {
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] | 2026-02-02T16:13:04 | 2026-02-02T16:26:31 | 2026-02-02T16:26:29 | MEMBER | null | null | null | null | EOL was a few months ago, and transformers doesn't support 3.9 anymore | {
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] | 2026-02-02T16:10:38 | 2026-02-02T16:26:16 | 2026-02-02T16:26:14 | MEMBER | null | null | null | null | write parquet data to temp files on disk prior to upload to save memory
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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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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https://api.github.com/repos/huggingface/datasets/issues/7977 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7977/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7977/comments | https://api.github.com/repos/huggingface/datasets/issues/7977/events | https://github.com/huggingface/datasets/pull/7977 | 3,879,142,697 | PR_kwDODunzps7AkMoM | 7,977 | Updated get_dataset_config_names returning default in offline mode | {
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] | 2026-01-31T11:49:39 | 2026-02-03T20:03:48 | 2026-01-31T11:50:33 | MEMBER | null | null | null | null | following #7971 | {
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https://api.github.com/repos/huggingface/datasets/issues/7975 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7975/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7975/comments | https://api.github.com/repos/huggingface/datasets/issues/7975/events | https://github.com/huggingface/datasets/pull/7975 | 3,878,625,407 | PR_kwDODunzps7AikAO | 7,975 | Docs: add Dataset.from_dict example | {
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This helps new users discover the most direct way to build a small dataset from in-memory Python data.
Docs-only change. | null | {
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https://api.github.com/repos/huggingface/datasets/issues/7974 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7974/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7974/comments | https://api.github.com/repos/huggingface/datasets/issues/7974/events | https://github.com/huggingface/datasets/pull/7974 | 3,878,625,349 | PR_kwDODunzps7Aij_g | 7,974 | Fix duplicate kwargs in load_dataset_builder | {
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Some module factories provide values in `builder_kwargs` (e.g. `base_path`), and users can also pass the same keys via `config_kwargs`, which raises:
`TypeError: ... got multiple values for keyword argument ...`.
Fix: if `config_kwargs` is provided,... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/7973 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7973/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7973/comments | https://api.github.com/repos/huggingface/datasets/issues/7973/events | https://github.com/huggingface/datasets/pull/7973 | 3,878,514,101 | PR_kwDODunzps7AiMd8 | 7,973 | Fix resolve_pattern for local symlinked files | {
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Problem: on the local `file://` filesystem, `fsspec` can report symlinks as `type=="other"` and omit the `islink` flag, so symlinked files are skipped.
Fix: when `protocol=="file"`, treat `os.path.islink(filepath)` as a link candidate and include it if it resolves to... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/7972 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7972/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7972/comments | https://api.github.com/repos/huggingface/datasets/issues/7972/events | https://github.com/huggingface/datasets/pull/7972 | 3,874,083,781 | PR_kwDODunzps7AT07I | 7,972 | feat: implement iter_arrow for skip, take and step iterables | {
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] | 2026-01-29T18:16:58 | 2026-01-31T11:50:25 | 2026-01-29T18:56:04 | MEMBER | null | null | null | null | possible now that row group sizes are auto-determined based on the content size after https://github.com/huggingface/datasets/pull/7589
Videos are uploaded as PLAIN in Parquet to make sure they can be seeked remotely and with random access to frames in https://github.com/huggingface/datasets/pull/7976
In the futu... | {
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"The following code *does* work:\n```py\nfrom datasets import load_dataset,Audio,Features\n\ndataset = load_dataset(\"csv\",data_files=\"audio.csv\",features=Features({\"audio\": Audio()}))\nprint(dataset[\"train\"][0][\"audio\"])\n```",
"Thanks for reporing ! Are you using pandas v3 by any chance ? The CSV loade... | 2026-01-29T09:33:35 | 2026-01-29T22:24:14 | null | NONE | null | null | {
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} | ### Describe the bug
Attempt to load a dataset from a csv with a single `audio` column with a single row with a path to an audio file fails when casting the column to Audio, but the exact same dataset created from a dictionary succeeds.
### Steps to reproduce the bug
1. Have any valid audio file `audio.wav`
2. Have ... | null | {
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] | 2026-01-28T12:00:37 | 2026-01-28T13:00:26 | 2026-01-28T13:00:23 | MEMBER | null | null | null | null | ```python
In [1]: from datasets import load_dataset_builder, StreamingDownloadManager
In [2]: b = load_dataset_builder("lance-format/openvid-lance")
Resolving data files: 100%|█| 240/240 [00:00<00:00, 42675.64it/s
In [3]: b.count_examples(StreamingDownloadManager())
Out[3]: {'train': 937957}
``` | {
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https://api.github.com/repos/huggingface/datasets/issues/7968 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7968/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7968/comments | https://api.github.com/repos/huggingface/datasets/issues/7968/events | https://github.com/huggingface/datasets/issues/7968 | 3,864,988,355 | I_kwDODunzps7mXwrD | 7,968 | Potential conflicting type checks and dead code in `/src/datasets/table.py` | {
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"ConcatenationTable is a subclass of datasets.table.Table but not pa.Table, so it should be fine"
] | 2026-01-28T11:34:53 | 2026-01-28T13:05:28 | null | NONE | null | null | {
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```
def to_blocks(table: Union[pa.Table, Table]) -> list[list[TableBlock]]:
if isinstance(table, pa.Table):
return [[InMemoryTable(table)]]
elif isinstance(ta... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/7967 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7967/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7967/comments | https://api.github.com/repos/huggingface/datasets/issues/7967/events | https://github.com/huggingface/datasets/pull/7967 | 3,863,579,646 | PR_kwDODunzps6_wnm8 | 7,967 | Issue 7756 Fix - multiprocessing hang issue with start method check | {
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Detects bad multiprocessing start_method, fallback happens.
https://github.com/huggingface/datasets/issues/7756 | null | {
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https://api.github.com/repos/huggingface/datasets/issues/7966 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7966/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7966/comments | https://api.github.com/repos/huggingface/datasets/issues/7966/events | https://github.com/huggingface/datasets/pull/7966 | 3,861,774,379 | PR_kwDODunzps6_qp_e | 7,966 | Infer types from lance blobs | {
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] | 2026-01-27T18:00:25 | 2026-01-28T13:02:25 | 2026-01-28T13:02:23 | MEMBER | null | null | null | null | Ex: infer Video() type in https://huggingface.co/datasets/lance-format/openvid-lance and Image() type in https://huggingface.co/datasets/lance-format/laion-1m
```python
from datasets import load_dataset
ds = load_dataset("lance-format/laion-1m", streaming=True, split="train")
print(ds.feature["image"])
# Image... | {
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"Hi ! Yes you should use `cornell-movie-review-data/rotten_tomatoes` instead of `rotten_tomatoes`, which is the legacy name. Those datasets have been moved under their actual owners accounts some time ago (but we were keeping the old names as aliases)\n\nSome other impacted names are:\n- `imdb` -> `stanfordnlp/imdb... | 2026-01-27T02:20:31 | 2026-01-28T15:14:50 | 2026-01-28T15:14:50 | NONE | null | null | {
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https://github.com/mlflow/mlflow/actions/runs/21368603305/job/61506951617
```
ests/data/test_huggingface_dataset_and_source.py::test_from_huggingface_dataset_constructs_expected_dataset_with_revision - huggingface_hub.errors.HfHubHTTPError: 404 Client ... | {
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] | 2026-01-26T22:56:24 | 2026-01-26T22:59:18 | 2026-01-26T22:56:38 | MEMBER | null | null | null | null | following #7913 | {
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] | 2026-01-26T17:31:55 | 2026-01-26T17:48:46 | 2026-01-26T17:48:44 | MEMBER | null | null | null | null | fix for https://huggingface.co/datasets/arcprize/arc_agi_v2_public_eval | {
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https://api.github.com/repos/huggingface/datasets/issues/7962 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7962/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7962/comments | https://api.github.com/repos/huggingface/datasets/issues/7962/events | https://github.com/huggingface/datasets/pull/7962 | 3,856,811,005 | PR_kwDODunzps6_aM71 | 7,962 | Use Sequence instead of list in Dataset.from_parquet type hints | {
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"Thank you for the review!\r\n\r\nI’ve updated the implementation to:\r\n- Use Sequence from collections.abc as per project conventions\r\n- Restore backward compatibility with Union[PathLike, Sequence[PathLike]]\r\n- Keep the columns annotation as Optional[Sequence[str]]\r\n\r\nThe fixes are pushed. Please let me ... | 2026-01-26T17:01:47 | 2026-02-04T06:47:52 | null | NONE | null | null | null | null | This PR updates type annotations in Dataset.from_parquet to use Sequence instead of list to avoid mypy invariant type issues, as discussed in issue #5354.
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https://api.github.com/repos/huggingface/datasets/issues/7961 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7961/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7961/comments | https://api.github.com/repos/huggingface/datasets/issues/7961/events | https://github.com/huggingface/datasets/pull/7961 | 3,847,883,164 | PR_kwDODunzps6-9GHz | 7,961 | Revert "feat: avoid some copies in torch formatter (#7787)" | {
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] | 2026-01-23T15:13:01 | 2026-01-23T15:16:01 | 2026-01-23T15:15:33 | MEMBER | null | null | null | null | This reverts commit c412a6f5a50955e141c5169bf7abe005d10228d2 (I assume it was ai generated which makes it hard for me to review and make sure it doesn't have bad edge cases, but lmk if it wasn't, anyways it didn't take into account the torch kwargs which are responsible for sending the data to the correct device) | {
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https://api.github.com/repos/huggingface/datasets/issues/7960 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7960/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7960/comments | https://api.github.com/repos/huggingface/datasets/issues/7960/events | https://github.com/huggingface/datasets/pull/7960 | 3,847,601,199 | PR_kwDODunzps6-8Iak | 7,960 | docs: fix grammar and add type hints in splits.py | {
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src/datasets/splits.py
by:
Fixing pluralization/grammar errors in docstrings (Lines 62, 73, 403).
Adding Python type hints to the
NamedSplit
constructor for better code quality.
Verified with ruff format and ruff check. | {
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"@lhoestq tagging you here as you were on the previous issue, hope that's fine. ",
"Thanks for reporting, let me take a look",
"I reverted this change which caused the issue #7961 , I'll do a new release soon but in the meantime feel free to install `datasets` from source",
"@lhoestq thanks a lot. I am actual... | 2026-01-23T12:06:48 | 2026-01-25T05:30:53 | null | NONE | null | null | {
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} | ### Describe the bug
The problem is that when calling:
```ds.set_format(type="torch", columns = ["input", "labels"], device="cuda")```
The device type of the individual datapoints is now: `cpu` as opposed to `cuda:0`.
With `v4.0.0` it still works. With `v4.5.0` it doesn't work anymore.
Related Issue:
https://github... | null | {
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"Hi maintainers 👋 \r\nThis PR fixes `all_exhausted_without_replacement` to ensure all samples are emitted exactly once, \r\nand adds a regression test reproducing the reported issue.\r\n\r\nHappy to adjust the implementation or split changes if you’d prefer.\r\nThanks!\r\n",
"We just merged https://github.com/... | 2026-01-21T18:47:32 | 2026-01-23T16:09:28 | 2026-01-23T16:09:28 | NONE | null | null | null | null | Fix interleave_datasets "all_exhausted_without_replacement" stopping strategy
- Corrected logic to ensure each sample is picked exactly once when using
stopping_strategy="all_exhausted_without_replacement".
- Adjusted boolean stopping condition to properly track dataset exhaustion.
- Added test to verify the l... | {
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"Yes, that's a hard limit. Can you split your files into different folders? Or we'll probably have a new repo type in the near to mid future that will relax this limit a bit. ",
"Thanks! Working around this with a different sharding parameter to have fewer overall fragments (and therefore fewer files in `*.lance/... | 2026-01-21T16:37:38 | 2026-01-22T09:38:38 | null | NONE | null | null | {
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Can the hard limit of 10k files per folder be extended with acceptable loss in performance?
### Motivation
I'm uploading a lance dataset to huggingface hub and have a folder inside lance internals (`data/*.lance/_transactions`) that has > 20k atomic transaction records and my commits are being re... | null | {
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"The docs for this PR live [here](/static-proxy?url=https%3A%2F%2Fmoon-ci-docs.huggingface.co%2Fdocs%2Fdatasets%2Fpr_7955). All of your documentation changes will be reflected on that endpoint. The docs are available until 30 days after the last update."
] | 2026-01-21T08:10:45 | 2026-01-24T02:55:56 | 2026-01-23T16:08:39 | CONTRIBUTOR | null | null | null | null | When using interleave_datasets with stopping_strategy="all_exhausted_without_replacement" and probabilities=None, the function was incorrectly falling into the undersampling branch, causing it to stop at min(lengths) instead of continuing until all datasets were exhausted.
This fix adds a specific branch to handle t... | {
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} | ### Describe the bug
>>> from datasets import Dataset, interleave_datasets
>>> d1 = Dataset.from_dict({"a": [0, 1, 2]})
>>> d2 = Dataset.from_dict({"a": [10, 11, 12, 13]})
>>> d3 = Dataset.from_dict({"a": [20, 21, 22]})
>>> dataset = interleave_datasets([d1, d2, d3], stopping_strategy="all_exhausted_without_replacemen... | null | {
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Note: Local pytest errors on Python 3.13 due to removal of `distutils` are unrelated to this change.
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Note: Local pytest errors on Python 3.13 due to removal of `distutils` are unrelated to this change.
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Add native support for loading GenBank (.gb, .gbk, .genbank) files, a standard format for biological sequence data with annotations maintained by NCBI.
## Changes
- Add `genbank` packaged module with pure Python state machine parser
- Register GenBank extensions in `_PACKAGED_DATASETS_MODULES` and `_EXTENSI... | null | {
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"The docs for this PR live [here](/static-proxy?url=https%3A%2F%2Fmoon-ci-docs.huggingface.co%2Fdocs%2Fdatasets%2Fpr_7950). All of your documentation changes will be reflected on that endpoint. The docs are available until 30 days after the last update.",
"Hi @prrao87 ! All the main examples with pylance should be in their dedicated documenta... | 2026-01-17T19:33:31 | 2026-01-23T16:40:20 | 2026-01-23T16:16:43 | CONTRIBUTOR | null | null | null | null | ## Summary
Updated the Lance integration docs to match the official dataset cards and expand coverage of multimodal workflows in `use_with_lance.mdx`.
## Details
- Added a Lance format-focused guidance page for multimodal examples:
- Stream from the Hub via `datasets` API
- Use Lance's dataset API to p... | {
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https://api.github.com/repos/huggingface/datasets/issues/7949 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7949/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7949/comments | https://api.github.com/repos/huggingface/datasets/issues/7949/events | https://github.com/huggingface/datasets/pull/7949 | 3,824,515,306 | PR_kwDODunzps69v3lh | 7,949 | docs: clarify documentation build instructions | {
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"This PR clarifies the documentation build instructions by improving wording and adding clarity for local builds."
] | 2026-01-17T06:24:24 | 2026-01-17T06:25:14 | null | CONTRIBUTOR | null | null | null | null | docs: clarify documentation build instructions | null | {
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https://api.github.com/repos/huggingface/datasets/issues/7948 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7948/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7948/comments | https://api.github.com/repos/huggingface/datasets/issues/7948/events | https://github.com/huggingface/datasets/pull/7948 | 3,824,437,597 | PR_kwDODunzps69vnHh | 7,948 | json: add optional return_file_name parameter | {
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When enabled, a new `file_name` column is added containing the source file name
for each row. Default behavior is unchanged.
Changes:
- Add `return_file_name` to JsonConfig
- Append file name during JSON table generation
- Add t... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/7947 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7947/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7947/comments | https://api.github.com/repos/huggingface/datasets/issues/7947/events | https://github.com/huggingface/datasets/issues/7947 | 3,823,309,787 | I_kwDODunzps7j4xPb | 7,947 | MMLU get_dataset_config_names provides different lists of subsets in online and offline modes | {
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} | ### Describe the bug
When getting the config names of `cais/mmlu` in online mode, it provides the different subjects and `all` but in offline mode is provides `default` even with cached version of the dataset.
### Steps to reproduce the bug
1. First download dataset in online mode so that it is cached:
```
$ HF_DATA... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/7946 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7946/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7946/comments | https://api.github.com/repos/huggingface/datasets/issues/7946/events | https://github.com/huggingface/datasets/issues/7946 | 3,817,678,454 | I_kwDODunzps7jjSZ2 | 7,946 | Question: Is there a faster way to push_to_hub for large image datasets? | {
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"This is a really interesting approach, especially combining parallel parquet\nconversion with upload_large_folder and hf_xet.\n\nOne question / observation:\nThe shard calculation currently uses max_shard_size_mb as a proxy for\nsamples_per_shard. Since sample size can vary a lot across datasets,\nwould it make se... | 2026-01-15T13:54:37 | 2026-01-17T13:27:20 | null | NONE | null | null | {
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} | # Question: Is there a faster way to `push_to_hub` for large image datasets? Or could this approach be integrated?
Hi! I frequently work with large image datasets (100k-300k+ samples) and found that `dataset.push_to_hub()` can be quite slow.
cc @lhoestq - would love your thoughts on this!
I experimented with an alte... | null | {
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] | 2026-01-13T17:10:03 | 2026-01-14T16:46:53 | 2026-01-14T16:46:51 | MEMBER | null | null | null | null | Useful to list a dataset's shards:
```python
from datasets import load_dataset_builder, StreamingDownloadManager
dlm = StreamingDownloadManager()
def get_shards(dataset_name, *args, **kwargs):
b = load_dataset_builder(dataset_name, *args, **kwargs)
splits = b._split_generators(dlm)
return list(... | {
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] | 2026-01-13T13:37:09 | 2026-01-13T13:40:21 | 2026-01-13T13:38:02 | MEMBER | null | null | null | null | fix https://github.com/huggingface/datasets/issues/7936 | {
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Datasets requires Python 3.9+ (since PR #7474).
There's some dill specific code branches checking for earlier versions of python which can be removed. | null | {
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https://api.github.com/repos/huggingface/datasets/issues/7940 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7940/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7940/comments | https://api.github.com/repos/huggingface/datasets/issues/7940/events | https://github.com/huggingface/datasets/pull/7940 | 3,807,386,503 | PR_kwDODunzps682sBj | 7,940 | Improve readability and documentation of indexing integration tests | {
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This PR improves the readability and maintainability of the indexing integration tests by adding clear, detailed comments throughout the test suite.
### Motivation
The indexing tests cover multiple backends (FAISS and Elasticsearch) and involve non-trivial workflows such as vector creation, indexing, q... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/7939 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7939/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7939/comments | https://api.github.com/repos/huggingface/datasets/issues/7939/events | https://github.com/huggingface/datasets/issues/7939 | 3,806,889,870 | I_kwDODunzps7i6IeO | 7,939 | datasets.load_from_disk progress bar optional manual control | {
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} | ### Feature request
This is tangentially related to [https://github.com/huggingface/datasets/issues/7918](https://github.com/huggingface/datasets/issues/7918).
When loading a dataset with > 16 files a progress bar is shown (unless stdout is redirected or [https://github.com/huggingface/datasets/pull/7919](https://git... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/7938 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7938/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7938/comments | https://api.github.com/repos/huggingface/datasets/issues/7938/events | https://github.com/huggingface/datasets/pull/7938 | 3,804,486,642 | PR_kwDODunzps68tYX1 | 7,938 | Fix method to retrieve attributes from file object | {
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] | 2026-01-12T14:08:31 | 2026-01-12T14:13:12 | 2026-01-12T14:10:12 | MEMBER | null | null | null | null | fix http://github.com/huggingface/datasets/issues/7936 | {
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https://api.github.com/repos/huggingface/datasets/issues/7937 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7937/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7937/comments | https://api.github.com/repos/huggingface/datasets/issues/7937/events | https://github.com/huggingface/datasets/pull/7937 | 3,803,185,984 | PR_kwDODunzps68pBId | 7,937 | Fix duplicate log messages by disabling log propagation by default | {
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```python
import logging
logging.basicConfig(level=logging.WARNING)
from datasets.utils.logging import get_logger
get_logger("datasets.load").warning("This appears twice")
```
Outputs:
```
This appears ... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/7936 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7936/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7936/comments | https://api.github.com/repos/huggingface/datasets/issues/7936/events | https://github.com/huggingface/datasets/issues/7936 | 3,795,750,271 | I_kwDODunzps7iPo1_ | 7,936 | _add_retries_to_file_obj_read_method makes file_obj invalid for pyarrow | {
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"hmm not sure how to fix this, I believe `file_obj.__getattr__ = lambda _, attr: getattr(orig_file_obj, attr)` would make all the methods point to the original file_obj",
"> hmm not sure how to fix this, I believe `file_obj.__getattr__ = lambda _, attr: getattr(orig_file_obj, attr)` would make all the methods poi... | 2026-01-09T07:05:25 | 2026-01-14T13:47:50 | 2026-01-13T13:38:03 | NONE | null | null | {
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} | ### Describe the bug
I'm trying to use `load_dataset` to construct a dataset that read parquet data on HDFS streamingly, like
```python
ds = load_dataset(
"parquet",
data_files={
"train": "hdfs://xxx/train*.parquet",
"test": "hdfs://xxx/test*.parquet"
},
streaming=True,
)
```
I encounte... | {
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https://api.github.com/repos/huggingface/datasets/issues/7935 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7935/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7935/comments | https://api.github.com/repos/huggingface/datasets/issues/7935/events | https://github.com/huggingface/datasets/pull/7935 | 3,795,376,274 | PR_kwDODunzps68QDVY | 7,935 | Bug fix: Add HDFS hostname to protocol prefix | {
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"Hi ! is it related to https://github.com/huggingface/datasets/issues/7934 ?\r\n\r\nIt's not clear to me why the protocol would need this, given hostname should be present in `pattern` already\r\n\r\n```python\r\nresolve_pattern(\"hdfs://hostname/user/xxx\", ...)\r\n```",
"> Hi ! is it related to #7934 ?\r\n> \r\... | 2026-01-09T03:59:45 | 2026-01-15T04:06:17 | null | NONE | null | null | null | null | For HDFS url with hostname like `hdfs://hostname/user/xxx`, the function `resolve_pattern` would drop the hostname, and outputs `hdfs:///user/xxx`. This may break later file operations by trying to connect to wrong HDFS cluster. | null | {
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https://api.github.com/repos/huggingface/datasets/issues/7934 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7934/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7934/comments | https://api.github.com/repos/huggingface/datasets/issues/7934/events | https://github.com/huggingface/datasets/issues/7934 | 3,792,642,445 | I_kwDODunzps7iDyGN | 7,934 | xPath cannot handle hdfs:///xxxx properly | {
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} | ### Describe the bug
_as_str('hdfs:///xxxx') would return hdfs://xxxx. Removing one / and making the path invalid.
For the use case like
```
ds = load_dataset(
"parquet",
data_files={
"train": "hdfs:///user/path/to/data/train*.parquet",
},
streaming=True,
storage_options={
"host": ... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/7933 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7933/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7933/comments | https://api.github.com/repos/huggingface/datasets/issues/7933/events | https://github.com/huggingface/datasets/pull/7933 | 3,780,607,384 | PR_kwDODunzps67fNaP | 7,933 | feat: Add Apache TsFile format support | {
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"The docs for this PR live [here](/static-proxy?url=https%3A%2F%2Fmoon-ci-docs.huggingface.co%2Fdocs%2Fdatasets%2Fpr_7933). All of your documentation changes will be reflected on that endpoint. The docs are available until 30 days after the last update."
] | 2026-01-05T08:28:12 | 2026-01-06T10:26:51 | null | NONE | null | null | null | null | # Add Apache TsFile format support
Adds support for loading `.tsfile` datasets. Closes #7922.
## What's TsFile?
[Apache TsFile](https://tsfile.apache.org/) is a columnar time-series format popular in IoT. The TsFile community requested this integration and offered to help maintain it.
## What I did
Creat... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/7932 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7932/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7932/comments | https://api.github.com/repos/huggingface/datasets/issues/7932/events | https://github.com/huggingface/datasets/pull/7932 | 3,777,725,050 | PR_kwDODunzps67WqhL | 7,932 | Fix duplicate keyword conflict in load_dataset_builder | {
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"Hi HuggingFace team\r\nThis PR fixes issue #4910 by safely merging builder_kwargs and config_kwargs to avoid duplicate keyword errors. \r\nA regression test is included to ensure this does not happen again. \r\n\r\nPlease let me know if you’d like any changes. Thanks!\r\n"
] | 2026-01-03T05:49:06 | 2026-01-03T05:52:02 | null | NONE | null | null | null | null | Fixes #4910
This PR fixes a bug where passing the same keyword in builder_kwargs and
config_kwargs caused a TypeError in load_dataset_builder.
The kwargs are now merged safely so config_kwargs override builder_kwargs
without duplication. A regression test is added to prevent this from
happening again.
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https://api.github.com/repos/huggingface/datasets/issues/7931 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7931/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7931/comments | https://api.github.com/repos/huggingface/datasets/issues/7931/events | https://github.com/huggingface/datasets/issues/7931 | 3,777,662,799 | I_kwDODunzps7hKo9P | 7,931 | Enable CORS + HTTP Range support for browser partial reads on cas-bridge.xethub.hf.co (Parquet row-group access) | {
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"Cc @assafvayner maybe ? or @cfahlgren1 @severo if you've already encountered this ?",
"OK, reproduced with hyparquet on https://huggingface.co/spaces/hyperparam/hyperparam, see https://huggingface.co/spaces/hyperparam/hyperparam?url=https%3A%2F%2Fhuggingface.co%2Fdatasets%2Ffacebook%2Fresearch-plan-gen%2Fblob%2F... | 2026-01-03T04:23:54 | 2026-01-12T21:51:41 | null | NONE | null | null | {
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} | ### Feature request
## Summary
Browser-based data tools need Range requests to read Parquet efficiently (footer + selected row groups). Downloads from the Hub redirect to cas-bridge.xethub.hf.co (Xet bridge). The redirected host fails CORS preflight for Range/HEAD workflows, blocking partial reads. ([Hugging Face](htt... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/7930 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7930/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7930/comments | https://api.github.com/repos/huggingface/datasets/issues/7930/events | https://github.com/huggingface/datasets/pull/7930 | 3,777,628,848 | PR_kwDODunzps67WYwc | 7,930 | Proposal: Protein 3D Structure Visualization for Dataset Viewer | {
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"cc @georgia-hf - Following up on your question about protein visualization for the Dataset Viewer. This proposal recommends 3Dmol.js (~150KB gzipped) as a lightweight alternative to Mol* (~1.3MB gzipped).\n\nLooking forward to your feedback!",
"Exciting ! cc @cfahlgren1 @severo for the Viewer part\r\n\r\nFor the... | 2026-01-03T03:30:01 | 2026-01-26T16:17:25 | null | NONE | null | null | null | null | # Proposal: Protein 3D Structure Visualization for HuggingFace Dataset Viewer
## Executive Summary
This proposal outlines adding 3D protein structure visualization to the HuggingFace Dataset Viewer, enabling users to interactively view PDB and mmCIF molecular structures directly within the dataset preview interface.
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https://api.github.com/repos/huggingface/datasets/issues/7929 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7929/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7929/comments | https://api.github.com/repos/huggingface/datasets/issues/7929/events | https://github.com/huggingface/datasets/pull/7929 | 3,776,098,655 | PR_kwDODunzps67Rayd | 7,929 | Raise early for invalid `revision` in `load_dataset` | {
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"Passes\r\n```sh\r\npytest -k \"LoadTest and test_load_dataset_invalid_revision_with_cache\"\r\n```\r\n\r\nFails\r\n```sh\r\ngit checkout cc2399019a3a547ebc31ec68a1ff99abd4ec93ce\r\npytest -k \"LoadTest and test_load_dataset_invalid_revision_with_cache\"\r\n```\r\n\r\nRan `make test`, but failures look unrelated to... | 2026-01-02T10:40:49 | 2026-01-09T11:08:44 | 2026-01-09T11:08:43 | CONTRIBUTOR | null | null | null | null | Solves https://github.com/huggingface/datasets/issues/7928
Raise early for invalid revisions
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https://api.github.com/repos/huggingface/datasets/issues/7928 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7928/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7928/comments | https://api.github.com/repos/huggingface/datasets/issues/7928/events | https://github.com/huggingface/datasets/issues/7928 | 3,775,842,185 | I_kwDODunzps7hDseJ | 7,928 | `load_dataset` `revision` param not respected when fetching from cache | {
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"This might be better placed as a feature request not a bug, since the logging `Using the latest cached version of the dataset since sentientfutures/ahb couldn't be found on the Hugging Face Hub` is clear.",
"https://github.com/huggingface/datasets/pull/7929 This only solves the case of invalid revisions. Fetchin... | 2026-01-02T08:20:47 | 2026-01-07T07:50:40 | null | CONTRIBUTOR | null | null | {
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} | ### Describe the bug
`datasets.load_dataset` `revision` semantics are a bit inconsistent when the dataset is not found on the huggingface hub. When fetching the latest cached version of the dataset, the `revision` argument is ignored, so long as any cached versions of the dataset already exist in the HF cache.
### St... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/7927 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7927/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7927/comments | https://api.github.com/repos/huggingface/datasets/issues/7927/events | https://github.com/huggingface/datasets/issues/7927 | 3,775,302,438 | I_kwDODunzps7hBosm | 7,927 | Using Stateful Dataloader with Split Dataset By Node and DCP for DDP | {
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"Does it need to be pickled?\n\n```python\n def load_state_dict(self, state_dict):\n hf_state = pickle.loads(state_dict[\"data\"])\n self.train_dataset.load_state_dict(hf_state)\n\n def state_dict(self):\n return {\"data\": pickle.dumps(self.train_dataset.state_dict())}\n```",
"Pickling... | 2026-01-01T22:27:07 | 2026-02-01T06:13:30 | null | NONE | null | null | {
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} | ### Describe the bug
I am trying to determine how to save and load the Stateful Dataloader State with DCP and Split Dataset by Node for DDP.
Currently, I am running into the issue where I am receiving a slow resume.
```
Neither dataset nor iter(dataset) defines state_dict/load_state_dict so we are naively fast-forwar... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/7926 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7926/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7926/comments | https://api.github.com/repos/huggingface/datasets/issues/7926/events | https://github.com/huggingface/datasets/pull/7926 | 3,773,696,472 | PR_kwDODunzps67Jxxz | 7,926 | Add lightweight PDB (Protein Data Bank) file support | {
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This PR adds support for loading PDB (Protein Data Bank) files with `load_dataset()`, following the **ImageFolder pattern** where **one row = one structure**.
Based on feedback from @lhoestq in #7930, this approach makes datasets more practical for ML workflows:
- Each row is independent, enabling train/te... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/7925 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7925/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7925/comments | https://api.github.com/repos/huggingface/datasets/issues/7925/events | https://github.com/huggingface/datasets/pull/7925 | 3,773,577,850 | PR_kwDODunzps67JW3g | 7,925 | feat: Add mmCIF file support for macromolecular structures | {
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This PR adds support for loading mmCIF (macromolecular Crystallographic Information File) files with `load_dataset()`, following the **ImageFolder pattern** where **one row = one structure**.
Based on feedback from @lhoestq in #7930, this approach makes datasets more practical for ML workflows:
- Each row ... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/7924 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7924/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7924/comments | https://api.github.com/repos/huggingface/datasets/issues/7924/events | https://github.com/huggingface/datasets/pull/7924 | 3,773,509,771 | PR_kwDODunzps67JHNF | 7,924 | Add lightweight FASTQ file format support | {
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This PR adds support for loading FASTQ files directly with `load_dataset()`.
FASTQ is an extension of FASTA that includes quality scores for each base, widely used for storing output from high-throughput sequencing instruments.
### Key Features
- **Zero external dependencies** - Pure Python parser based o... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/7923 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7923/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7923/comments | https://api.github.com/repos/huggingface/datasets/issues/7923/events | https://github.com/huggingface/datasets/pull/7923 | 3,773,472,998 | PR_kwDODunzps67I-y3 | 7,923 | feat(fasta): add lightweight FASTA file format support | {
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This PR adds support for loading FASTA files directly with `load_dataset()`, addressing feedback from #7851.
FASTA is a text-based format for representing nucleotide sequences (DNA/RNA) or peptide sequences (proteins), widely used in bioinformatics.
## Key Features
- **Zero external dependencies** - Uses... | null | {
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"A large quantity of industrial timeseries data has been stored as TsFile, and I have been constantly hearing about AI fellows complaining about the lack of data or the insufficiency of data quality.\n\nI like the ambition that uses TsFile as the bridge between AI research and industrial analysis requirements. This... | 2025-12-31T08:07:51 | 2026-01-05T08:23:21 | null | NONE | null | null | {
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I would love to use Hugging Face datasets library to directly load datasets composed of .tsfile files, for example:
`ds = load_dataset("username/dataset-with-tsfile-files")`
This feature would allow researchers working on time-series tasks to seamlessly integrate datasets stored in the Apache TsF... | null | {
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This improves onboarding experience for first-time users and reduces confusion for beginners.
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https://api.github.com/repos/huggingface/datasets/issues/7920 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7920/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7920/comments | https://api.github.com/repos/huggingface/datasets/issues/7920/events | https://github.com/huggingface/datasets/pull/7920 | 3,766,070,566 | PR_kwDODunzps66wgLx | 7,920 | Add progress_format support for machine-readable progress output | {
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Adds support to , enabling machine-readable JSON progress output similar to [huggingface/tokenizers#1921](https://github.com/huggingface/tokenizers/pull/1921).
## Motivation
When using `datasets` in automated pipelines or UI applications, it's useful to emit machine-readable progress instead of ANSI prog... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/7919 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7919/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7919/comments | https://api.github.com/repos/huggingface/datasets/issues/7919/events | https://github.com/huggingface/datasets/pull/7919 | 3,765,768,457 | PR_kwDODunzps66vmQC | 7,919 | Fix load_from_disk progress bar with redirected stdout | {
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"this seems to contradict the comment that says \r\n\r\n> set `disable=None` rather than `disable=False` by default to disable progress bar when no TTY attached\r\n\r\nI believe the right approach is to do the same as in https://github.com/huggingface/huggingface_hub/pull/2698",
"> this seems to contradict the co... | 2025-12-28T15:39:31 | 2026-01-16T14:44:49 | 2026-01-16T14:44:49 | CONTRIBUTOR | null | null | null | null | Fixes #7918
## Problem
When using `load_from_disk()` with `contextlib.redirect_stdout()`, the progress bar was not showing even for datasets with >16 files.
## Root Cause
The `disable` parameter was set to `None` which triggers TTY auto-detection. This fails when stdout is redirected, causing the progress ba... | {
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https://api.github.com/repos/huggingface/datasets/issues/7918 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7918/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7918/comments | https://api.github.com/repos/huggingface/datasets/issues/7918/events | https://github.com/huggingface/datasets/issues/7918 | 3,765,489,462 | I_kwDODunzps7gcM82 | 7,918 | datasets.load_from_disk doesn't show progress bar | {
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"#self-assign"
] | 2025-12-28T09:14:41 | 2026-01-16T14:44:50 | 2026-01-16T14:44:50 | NONE | null | null | {
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This is the inverse of the bug at [https://github.com/huggingface/datasets/issues/7030](https://github.com/huggingface/datasets/issues/7030), i.e. that `datasets.load_from_disk(path)` displays no progress bar. My dataset has > 16 files in it.
I am redirecting stdout as I capture the log, could th... | {
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https://api.github.com/repos/huggingface/datasets/issues/7917 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7917/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7917/comments | https://api.github.com/repos/huggingface/datasets/issues/7917/events | https://github.com/huggingface/datasets/issues/7917 | 3,764,913,807 | I_kwDODunzps7gaAaP | 7,917 | IterableDataset supports automatic sharding | {
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"You can already use `.shard()` instead like this:\n\n```python\ndataset = dataset.shard(index=rank, num_shards=world_size)\n```\n\nnote that it requires that `dataset.num_shards >= world_size`, and that it may result in nodes having the same number of shards +- 1",
"> You can already use `.shard()` instead like ... | 2025-12-27T16:48:29 | 2025-12-29T16:06:52 | null | NONE | null | null | {
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Added sharding function support to the streaming IterableDataset, allowing users to adjust the number of shards according to their training resources. For example:
```
dataset = load_dataset(*, stream=True)
dataset = dataset.shard(num_shards=num_shards, num_samples=num_samples) #We may need to know... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/7915 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7915/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7915/comments | https://api.github.com/repos/huggingface/datasets/issues/7915/events | https://github.com/huggingface/datasets/issues/7915 | 3,762,042,396 | I_kwDODunzps7gPDYc | 7,915 | GDPval dataset Word docs corrupted | {
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"tentatively tagging @simonpfish ^\n\n(if it's an option you could enable PRs/Discussions on your dataset on HF)"
] | 2025-12-25T13:56:55 | 2025-12-26T09:06:13 | null | NONE | null | null | {
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} | The [openai/gdpval](https://huggingface.co/datasets/openai/gdpval) dataset on Hugging Face contains Word .docx files with two types of corruption that cause Microsoft Word to display an "unreadable content" error.
### Root Causes
1. **Corrupted settings.xml**: The `word/settings.xml` file uses incorrect namespace pre... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/7914 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7914/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7914/comments | https://api.github.com/repos/huggingface/datasets/issues/7914/events | https://github.com/huggingface/datasets/issues/7914 | 3,760,894,100 | I_kwDODunzps7gKrCU | 7,914 | [ROCm] please install 'torchcodec' | {
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"I was able to install torchcodec by building it from source and have put together a PR: https://github.com/vllm-project/vllm/pull/31323\n\nStill I think it would make this framework more robust to add at least one fallback lib (that is more widely used) in place should torchcodec installation fail or library is no... | 2025-12-24T19:39:17 | 2025-12-28T07:25:42 | null | NONE | null | null | {
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} | ### Describe the bug
Datasets library is widely used by many Python packages. Naturally, it is a requirement on many platforms. This includes vLLM for ROCm. During audio dataset tests, there is an exception triggered:
```python
def decode_example(
self, value: dict, token_per_repo_id: Optional[dict[str, Un... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/7913 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7913/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7913/comments | https://api.github.com/repos/huggingface/datasets/issues/7913/events | https://github.com/huggingface/datasets/pull/7913 | 3,758,884,376 | PR_kwDODunzps66aEsF | 7,913 | Add lance format support | {
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"Mentioned https://github.com/huggingface/datasets/issues/7863 as well",
"@pdames for vis",
"The docs for this PR live [here](/static-proxy?url=https%3A%2F%2Fmoon-ci-docs.huggingface.co%2Fdocs%2Fdatasets%2Fpr_7913). All of your documentation changes will be reflected on that endpoint. The docs are available until 30 days after the last upda... | 2025-12-24T00:52:20 | 2026-01-09T10:48:29 | 2026-01-09T10:48:29 | CONTRIBUTOR | null | null | null | null | Add lance format as one of the `packaged_modules`.
```py
import datasets
ds = datasets.load_dataset("org/lance_repo", split="train")
# Or
ds = datasets.load_dataset("./local/data.lance")
``` | {
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https://api.github.com/repos/huggingface/datasets/issues/7912 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7912/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7912/comments | https://api.github.com/repos/huggingface/datasets/issues/7912/events | https://github.com/huggingface/datasets/pull/7912 | 3,755,023,829 | PR_kwDODunzps66NQzG | 7,912 | fix low but large example indexerror | {
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"The docs for this PR live [here](/static-proxy?url=https%3A%2F%2Fmoon-ci-docs.huggingface.co%2Fdocs%2Fdatasets%2Fpr_7912). All of your documentation changes will be reflected on that endpoint. The docs are available until 30 days after the last update."
] | 2025-12-22T19:53:59 | 2026-01-09T13:23:52 | 2026-01-09T13:23:51 | CONTRIBUTOR | null | null | null | null | Fixes #7911.
This PR simply implements the approach outlined in the corresponding issue, that if we have large examples, the number of shards should never be more than the number of samples. This is an absolute edge case, but can happen for image data. | {
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https://api.github.com/repos/huggingface/datasets/issues/7911 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7911/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7911/comments | https://api.github.com/repos/huggingface/datasets/issues/7911/events | https://github.com/huggingface/datasets/issues/7911 | 3,753,447,559 | I_kwDODunzps7fuRCH | 7,911 | IndexError when saving few large examples to disk | {
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I ran into this issue when processing a file (900MB) with just one example but simplified for a quicker reproducer below. The problem is that, if `num_shards` is not explicitly set, we calculate it manually using https://github.com/huggingface/datasets/blob/main/src/datasets/utils/py_utils.py#L96 ... | {
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https://api.github.com/repos/huggingface/datasets/issues/7910 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7910/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7910/comments | https://api.github.com/repos/huggingface/datasets/issues/7910/events | https://github.com/huggingface/datasets/pull/7910 | 3,749,894,414 | PR_kwDODunzps658oGv | 7,910 | Enhance cast_column() with cast_kwargs parameter | {
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expose `cast(**cast_kwargs)` to `cast_column()`
https://github.com/huggingface/datasets/blob/0feb65dd8733191dd2d1e74215b422fc5939a56a/src/datasets/arrow_dataset.py#L2205
### Motivation
`cast_column()` wraps `cast()` function without exposing any `cast()` args. For large multi-modal datasets, e.g... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/7908 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7908/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7908/comments | https://api.github.com/repos/huggingface/datasets/issues/7908/events | https://github.com/huggingface/datasets/pull/7908 | 3,747,829,610 | PR_kwDODunzps651xlf | 7,908 | set dev version | {
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https://api.github.com/repos/huggingface/datasets/issues/7906 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7906/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7906/comments | https://api.github.com/repos/huggingface/datasets/issues/7906/events | https://github.com/huggingface/datasets/pull/7906 | 3,747,764,992 | PR_kwDODunzps651jiI | 7,906 | Don't save original_shard_lengths by default for backward compat | {
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] | 2025-12-19T14:44:09 | 2025-12-19T14:57:25 | 2025-12-19T14:57:23 | MEMBER | null | null | null | null | following #7897
but let users enable it with `datasets.config.SAVE_ORIGINAL_SHARD_LENGTHS = True`
this is useful for the Dataset Viewer to know where each row comes from after converting to parquet | {
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https://api.github.com/repos/huggingface/datasets/issues/7905 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7905/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7905/comments | https://api.github.com/repos/huggingface/datasets/issues/7905/events | https://github.com/huggingface/datasets/issues/7905 | 3,734,233,245 | I_kwDODunzps7ek-Cd | 7,905 | Unbounded network usage when opening Data Studio | {
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"cc @cfahlgren1",
"Thanks for reporting! Looking into this!",
"This should be fixed. Thank you for your patience! 🤗"
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} | ### Describe the bug
Opening the Data Studio tab on a dataset page triggers continuous and unbounded network traffic. This issue occurs across multiple browsers and continues even without user interaction.
### Steps to reproduce the bug
https://huggingface.co/datasets/slone/nllb-200-10M-sample/viewer
### Expected... | {
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https://api.github.com/repos/huggingface/datasets/issues/7904 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7904/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7904/comments | https://api.github.com/repos/huggingface/datasets/issues/7904/events | https://github.com/huggingface/datasets/issues/7904 | 3,727,978,498 | I_kwDODunzps7eNHAC | 7,904 | Request: Review pending neuroimaging PRs (#7886 BIDS loader, #7887 lazy loading) | {
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"Hi ! sure I'll be happy to take a look, sorry for the delay :)"
] | 2025-12-14T20:34:31 | 2025-12-15T11:25:29 | null | CONTRIBUTOR | null | null | {
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I'm building production neuroimaging pipelines that depend on `datasets` and would benefit greatly from two pending PRs being reviewed/merged.
## Pending PRs
| PR | Description | Status | Open Since |
|----|-------------|--------|------------|
| [#7886](https://github.com/huggingface/datasets/pull/7886) |... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/7903 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7903/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7903/comments | https://api.github.com/repos/huggingface/datasets/issues/7903/events | https://github.com/huggingface/datasets/pull/7903 | 3,723,395,305 | PR_kwDODunzps64kO0d | 7,903 | Docs: add minimal usage example to dataset card guidelines | {
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https://api.github.com/repos/huggingface/datasets/issues/7902 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7902/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7902/comments | https://api.github.com/repos/huggingface/datasets/issues/7902/events | https://github.com/huggingface/datasets/issues/7902 | 3,723,281,150 | I_kwDODunzps7d7ML- | 7,902 | The child process retrieves the dataset directly from the main process instead of executing `memory_mapped_arrow_table_from_file`. | {
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"Memory mapping is actually the way for processes to share memory efficiently and without copy. It is efficient when on are using a local disk, and it's discouraged to use it on remote disk for the reasons you observed.\n\nWhat you can do instead is save the dataset as Parquet on your remote storage (or on Hugging ... | 2025-12-12T12:37:44 | 2025-12-15T11:48:16 | null | NONE | null | null | {
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The child process retrieves the dataset directly from the main process instead of executing `memory_mapped_arrow_table_from_file`.
### Motivation
Because my local disk space is insufficient, I can only store a dataset on a remote Ceph server and process it using datasets.
I used the data-juicer[h... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/7901 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7901/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7901/comments | https://api.github.com/repos/huggingface/datasets/issues/7901/events | https://github.com/huggingface/datasets/issues/7901 | 3,722,243,543 | I_kwDODunzps7d3O3X | 7,901 | ShuffledDataSourcesArrowExamplesIterable cannot properly resume from checkpoint | {
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"Hi ! As you can read in the logs, the shuffle buffer content is lost when resuming a shuffled dataset. The default size is 1000 examples, but you can tweak it\n\ne.g. if you run your code with this\n\n```diff\n- ds = Dataset.from_dict({\"a\": range(12)}).to_iterable_dataset(num_shards=1)\n- ds = ds.shuffle(seed=42... | 2025-12-12T06:57:32 | 2025-12-16T19:34:46 | null | NONE | null | null | {
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} | ### Describe the bug
ShuffledDataSourcesArrowExamplesIterable cannot properly resume from checkpoint
### Steps to reproduce the bug
1. The reproducible code is as follows：
```
from datasets import Dataset, concatenate_datasets, interleave_datasets
ds = Dataset.from_dict({"a": range(12)}).to_iterable_dataset(num_sha... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/7900 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/7900/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/7900/comments | https://api.github.com/repos/huggingface/datasets/issues/7900/events | https://github.com/huggingface/datasets/issues/7900 | 3,711,751,590 | I_kwDODunzps7dPNWm | 7,900 | `Permission denied` when sharing cache between users | {
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"I remember a fix from last year to usr the current umask for filelock 3.10.0, which filelock version are you using ? can you try another version ?",
"I believe we we are using `filelock==3.19.1`. Do you have a recommended version to use?",
"Our test suite has been testing all versions over time for years now, ... | 2025-12-09T16:41:47 | 2026-01-09T11:08:36 | null | NONE | null | null | {
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} | ### Describe the bug
We want to use `datasets` and `transformers` on a shared machine. Right now, each user has a separate HF_HOME in their home directory. To reduce duplicates of the datasets, we want to share that cache. While experimenting, we are running into `Permission denied` errors.
It looks like this was sup... | null | {
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