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https://api.github.com/repos/huggingface/datasets/issues/8622 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8622/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8622/comments | https://api.github.com/repos/huggingface/datasets/issues/8622/events | https://github.com/huggingface/datasets/pull/8622 | 5,455,129,393 | PR_kwDODunzps8AAAABDhWa0Q | 8,622 | Refactor README.md by removing HTML elements | {
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https://api.github.com/repos/huggingface/datasets/issues/8621 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8621/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8621/comments | https://api.github.com/repos/huggingface/datasets/issues/8621/events | https://github.com/huggingface/datasets/pull/8621 | 5,453,825,183 | PR_kwDODunzps8AAAABDgS_dQ | 8,621 | Fix docstring argument names that don't match the signatures | {
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} | Five public docstrings document parameters under names the functions don't accept, so code written from the docs fails with `TypeError: got an unexpected keyword argument`:
| Function | Docstring says | Signature has |
|---|---|---|
| `Dataset.train_test_split` | `train_cache_file_name`, `test_cache_file_name` | `trai... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/8620 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8620/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8620/comments | https://api.github.com/repos/huggingface/datasets/issues/8620/events | https://github.com/huggingface/datasets/pull/8620 | 5,448,595,744 | PR_kwDODunzps8AAAABDcE9bA | 8,620 | Keep origin_metadata aligned in DataFilesList.filter | {
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} | ## Summary
Fixes #8618.
`DataFilesList.filter()` returns a filtered list of data files but reuses the
original, unfiltered `origin_metadata`. `origin_metadata` is parallel to the
file list (one entry per file describing where the file was resolved from), so
after filtering it no longer lines up with the files it desc... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/8619 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8619/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8619/comments | https://api.github.com/repos/huggingface/datasets/issues/8619/events | https://github.com/huggingface/datasets/pull/8619 | 5,448,594,236 | PR_kwDODunzps8AAAABDcE4ng | 8,619 | Fix SplitDict.copy() crashing when dataset_name is None | {
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} | ## Summary
Fixes #8617.
`SplitDict.copy()` crashes with `AttributeError: 'SplitInfo' object has no
attribute 'get'` whenever the `SplitDict` holds `SplitInfo` objects (the normal
case after construction) and `dataset_name` is not passed explicitly.
In `SplitDict.from_split_dict`, the `dataset_name` fallback uncondit... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/8618 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8618/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8618/comments | https://api.github.com/repos/huggingface/datasets/issues/8618/events | https://github.com/huggingface/datasets/issues/8618 | 5,448,559,733 | I_kwDODunzps8AAAABRMJsdQ | 8,618 | `DataFilesList.filter()` leaves `origin_metadata` misaligned with the filtered files | {
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`DataFilesList` keeps `origin_metadata`, a list parallel to the file list where
each entry describes the origin of the file at the same index (e.g. the data
files pattern it was resolved from). After `filter()` removes some files, the
returned `DataFilesList` keeps the *unfiltered* `origin_metadata`, so... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/8617 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8617/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8617/comments | https://api.github.com/repos/huggingface/datasets/issues/8617/events | https://github.com/huggingface/datasets/issues/8617 | 5,448,559,498 | I_kwDODunzps8AAAABRMJrig | 8,617 | `SplitDict.copy()` crashes when `dataset_name` is not set | {
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`SplitDict.copy()` (and `SplitDict.from_split_dict`) crashes with
`AttributeError: 'SplitInfo' object has no attribute 'get'` whenever the split
dict contains `SplitInfo` objects and `dataset_name` is `None`.
## Reproduction
```python
from datasets import SplitDict, SplitInfo
split_dict = SplitDict({... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/8616 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8616/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8616/comments | https://api.github.com/repos/huggingface/datasets/issues/8616/events | https://github.com/huggingface/datasets/pull/8616 | 5,445,484,469 | PR_kwDODunzps8AAAABDZlChQ | 8,616 | test(utils): add unit test suite for dataset repository path and name sanitization | {
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} | ### Summary
Adds focused unit tests in `tests/test_dataset_name_invariants.py` verifying repository path identifier parsing:
- Confirms organization namespace and dataset name separation.
- Validates clean fallback handling for unnamespaced identifiers.
- Non-invasive, test-only addition.
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https://api.github.com/repos/huggingface/datasets/issues/8615 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8615/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8615/comments | https://api.github.com/repos/huggingface/datasets/issues/8615/events | https://github.com/huggingface/datasets/pull/8615 | 5,436,747,161 | PR_kwDODunzps8AAAABDS0bGw | 8,615 | Publish extraction caches atomically so concurrent jobs never read partial output | {
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} | Resolves #4661
## Root cause
`ExtractManager.extract` decided "already extracted" (output file exists, or output directory non-empty) **before** `Extractor.extract` took the per-output `FileLock`, and the extractor wrote straight into the final path. With two jobs sharing a cache directory, job B saw job A's half-wri... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/8614 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8614/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8614/comments | https://api.github.com/repos/huggingface/datasets/issues/8614/events | https://github.com/huggingface/datasets/pull/8614 | 5,434,361,651 | PR_kwDODunzps8AAAABDQ-N_g | 8,614 | Fingerprint functions from the user's own modules by value | {
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https://api.github.com/repos/huggingface/datasets/issues/8613 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8613/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8613/comments | https://api.github.com/repos/huggingface/datasets/issues/8613/events | https://github.com/huggingface/datasets/pull/8613 | 5,433,978,593 | PR_kwDODunzps8AAAABDQrb4A | 8,613 | Resolve a legacy dataset name to its canonical repo id | {
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} | `load_dataset("imdb")` dies with an `HfUriError` about a `.huggingface.yaml` nobody asked for, and so do `squad`, `glue`, `rotten_tomatoes`, `ag_news`, `cnn_dailymail`, `mnist` and `wikitext`.
The Hub still redirects these names, so the first half of the load works: `hf_hub_download(repo_id="imdb", ...)` returns the c... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/8612 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8612/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8612/comments | https://api.github.com/repos/huggingface/datasets/issues/8612/events | https://github.com/huggingface/datasets/issues/8612 | 5,433,977,361 | I_kwDODunzps8AAAABQ-PqEQ | 8,612 | load_dataset on a dataset name with no namespace raises HfUriError | {
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```python
>>> from datasets import load_dataset
>>> load_dataset("imdb", split="train[:5]")
...
File "src/datasets/load.py", line 609, in get_module
standalone_yaml_path = cached_path(
File "src/datasets/utils/file_utils.py", line 1... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/8611 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8611/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8611/comments | https://api.github.com/repos/huggingface/datasets/issues/8611/events | https://github.com/huggingface/datasets/pull/8611 | 5,432,685,004 | PR_kwDODunzps8AAAABDPtnPw | 8,611 | Send map workers only their shard's rows instead of the whole table | {
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## Root cause
`Dataset.map(num_proc>1)` shards the table with Arrow slices (`table.slice`), and Arrow slices share their parent buffers. When a shard is pickled for a worker, `InMemoryTable.__getstate__` serializes the sliced arrays' full buffers, so every worker receives the whole table. A 2-process m... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/8610 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8610/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8610/comments | https://api.github.com/repos/huggingface/datasets/issues/8610/events | https://github.com/huggingface/datasets/pull/8610 | 5,432,354,541 | PR_kwDODunzps8AAAABDPdiuw | 8,610 | Pickle nonimportable Enums so Dataset.map(num_proc>1) and hashing work | {
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## Root cause
`dill` serializes a class it cannot import by its module path through `_create_type`, which rebuilds the class from `type(name, bases, dict)`. That path cannot rebuild an `Enum`: the members, `_value2member_map_`, aliases, Flag boundary and slot descriptors are produced by `EnumMeta.__new... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/8609 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8609/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8609/comments | https://api.github.com/repos/huggingface/datasets/issues/8609/events | https://github.com/huggingface/datasets/pull/8609 | 5,430,605,938 | PR_kwDODunzps8AAAABDOHJjA | 8,609 | Write pushed features to card when re-pushing a split | {
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} | Fixes #8608.
`_get_updated_dataset_card` updates the splits and sizes of the existing `dataset_info` when
a config is re-pushed, but never assigns the pushed `features` to it. Re-pushing a dataset's
only split with different columns therefore leaves the card declaring the previous schema
while the shards hold the... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/8608 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8608/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8608/comments | https://api.github.com/repos/huggingface/datasets/issues/8608/events | https://github.com/huggingface/datasets/issues/8608 | 5,430,588,518 | I_kwDODunzps8AAAABQ7A0Zg | 8,608 | `push_to_hub()` keeps stale `dataset_info.features` when re-pushing a single split with different columns | {
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Re-pushing a dataset's only split with different columns updates the shards and the split
sizes in the README, but silently keeps the **old** `dataset_info.features`. The card then
declares a schema the parquet files no longer have, and the dataset viewer fails on the
first batch with `CastError: ... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/8607 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8607/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8607/comments | https://api.github.com/repos/huggingface/datasets/issues/8607/events | https://github.com/huggingface/datasets/pull/8607 | 5,429,805,406 | PR_kwDODunzps8AAAABDNfT8Q | 8,607 | docs: remove duplicate 'to' in push_to_hub instructions | {
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https://api.github.com/repos/huggingface/datasets/issues/8606 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8606/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8606/comments | https://api.github.com/repos/huggingface/datasets/issues/8606/events | https://github.com/huggingface/datasets/pull/8606 | 5,428,971,578 | PR_kwDODunzps8AAAABDM1XWg | 8,606 | Fix PandasArrayExtensionDtype comparison against strings | {
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} | ## Summary
Implement `construct_from_string` on `PandasArrayExtensionDtype`: parse `array[<dtype>]` into a `PandasArrayExtensionDtype`, and raise `TypeError` for anything else (how pandas spells "not my dtype" in `__eq__`). Provenance: pandas extension-dtype docs, and the reproduction on `main` in #8467 (pandas 3.0.5)... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/8605 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8605/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8605/comments | https://api.github.com/repos/huggingface/datasets/issues/8605/events | https://github.com/huggingface/datasets/pull/8605 | 5,428,597,522 | PR_kwDODunzps8AAAABDMiUHA | 8,605 | Restore `_legacy_no_dict_keys_sorting` so `_check_legacy_cache2` can find 2.15.0 caches. | {
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} | ## Summary
Restore the early return in `Pickler._batch_setitems` that honours `_legacy_no_dict_keys_sorting`, keeping the `*args` / `**kwargs` passthrough from `#7817`. `#7817` updated `Pickler._batch_setitems` for Python 3.14's extra argument and, in the same hunk, dropped that return. `_check_legacy_cache2` still pa... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/8604 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8604/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8604/comments | https://api.github.com/repos/huggingface/datasets/issues/8604/events | https://github.com/huggingface/datasets/pull/8604 | 5,424,758,085 | PR_kwDODunzps8AAAABDJc9Vg | 8,604 | Recover from invalid list offsets produced by the pyarrow JSON reader | {
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} | Resolves #5531
## Root cause
The invalid Arrow data comes from pyarrow's JSON reader, not from `datasets`: when a list column's first non-empty value in a block starts with `null` (e.g. `{"a": [null, 1]}`), type inference can drop the leading null while the offsets still count it, so the table's list offsets span mor... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/8603 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8603/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8603/comments | https://api.github.com/repos/huggingface/datasets/issues/8603/events | https://github.com/huggingface/datasets/pull/8603 | 5,423,838,059 | PR_kwDODunzps8AAAABDIuH9g | 8,603 | Add a Tensor feature for arrays with fixed or dynamic shapes | {
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} | Resolves #7738.
This adds a `Tensor(shape, dtype)` feature for multi-dimensional arrays whose dimensions can vary from row to row, following the direction discussed in the issue: fixed shapes use Arrow's canonical `arrow.fixed_shape_tensor` extension, and shapes with unknown dimensions (or an explicit `ndim`) use the ... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/8602 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8602/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8602/comments | https://api.github.com/repos/huggingface/datasets/issues/8602/events | https://github.com/huggingface/datasets/pull/8602 | 5,422,106,624 | PR_kwDODunzps8AAAABDHVkbA | 8,602 | Key the doc build concurrency group on the pull request number | {
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} | ## What does this PR do?
`build_pr_documentation.yml` keys its concurrency group on `github.head_ref`, which is the head branch name without the fork owner. Two open PRs from different forks whose branches share a name therefore land in the same group, and a push on one cancels the in-flight doc build on the other.
S... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/8601 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8601/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8601/comments | https://api.github.com/repos/huggingface/datasets/issues/8601/events | https://github.com/huggingface/datasets/pull/8601 | 5,419,987,895 | PR_kwDODunzps8AAAABDFqhFw | 8,601 | Add append=True to push_to_hub for incremental dataset updates | {
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`push_to_hub` replaced every shard of a split on each call, so growing a dataset meant re-uploading all of it. This adds `append=True` to `Dataset.push_to_hub` and `DatasetDict.push_to_hub`, following the approach discussed in the issue: download the last Parquet shard of the target split, copy its row... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/8600 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8600/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8600/comments | https://api.github.com/repos/huggingface/datasets/issues/8600/events | https://github.com/huggingface/datasets/pull/8600 | 5,418,172,122 | PR_kwDODunzps8AAAABDEN67g | 8,600 | Decode BioSequence and BioStructure records with universal newlines | {
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https://api.github.com/repos/huggingface/datasets/issues/8598 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8598/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8598/comments | https://api.github.com/repos/huggingface/datasets/issues/8598/events | https://github.com/huggingface/datasets/pull/8598 | 5,413,916,263 | PR_kwDODunzps8AAAABDAzNEQ | 8,598 | [httpx migration] Import httpx from huggingface_hub, require huggingface_hub>=1.31.0 | {
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} | Fixes #8595.
`_apply_async` polled `future.ready()` in an `await asyncio.sleep(0)` loop. With the in-flight cap at `2 * num_threads`, that many hot loops keep the event loop thread holding the GIL, starving the ThreadPool threads it is waiting on — in stack dumps a pool worker took 45+ seconds to get through `ssl.crea... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/8596 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8596/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8596/comments | https://api.github.com/repos/huggingface/datasets/issues/8596/events | https://github.com/huggingface/datasets/issues/8596 | 5,413,314,229 | I_kwDODunzps8AAAABQqietQ | 8,596 | load_dataset silently accepts out-of-range ClassLabel indices when the source dtype already matches | {
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Loading a file whose parsed Arrow dtype already matches a declared `ClassLabel`'s storage type (`int64`) skips the range check entirely. Out-of-range indices load with no error and no warning, and only surface later at `int2str` time or as silently wrong labels during training.
```python
from dat... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/8595 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8595/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8595/comments | https://api.github.com/repos/huggingface/datasets/issues/8595/events | https://github.com/huggingface/datasets/issues/8595 | 5,413,236,409 | I_kwDODunzps8AAAABQqduuQ | 8,595 | IterableDataset.decode(num_threads) busy-polls its ThreadPool futures, starving the decode threads — 0 rows on remote audio; callback-based bridging restores the intended 20x | {
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### Describe the bug
`decode(num_threads=N)` (added in #7450, "speeds up streaming up to 20 times") schedules the sync `decode_example` calls onto a `multiprocessing.pool.ThreadPool` and bridges them into the async map machinery with a busy-poll (`iterable_dataset.py`):
```python
async def _apply_async(pool, func, x... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/8594 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8594/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8594/comments | https://api.github.com/repos/huggingface/datasets/issues/8594/events | https://github.com/huggingface/datasets/pull/8594 | 5,402,751,187 | PR_kwDODunzps8AAAABC3z2_A | 8,594 | Forward max_buffer_input_shards from IterableDatasetDict.shuffle | {
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"merged_at": "2026-09-10T13:32... | ## What breaks
`load_dataset(..., streaming=True)` without a split returns an `IterableDatasetDict`, and shuffling it cannot reach the shard-interleaving control:
```python
ds = load_dataset("HuggingFaceFW/fineweb", streaming=True)
ds = ds.shuffle(seed=42, buffer_size=10_000, max_buffer_input_shards=4)
# TypeError: I... | {
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https://api.github.com/repos/huggingface/datasets/issues/8593 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8593/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8593/comments | https://api.github.com/repos/huggingface/datasets/issues/8593/events | https://github.com/huggingface/datasets/pull/8593 | 5,401,684,206 | PR_kwDODunzps8AAAABC28WLA | 8,593 | Preserve dataset metadata when map recombines shards | {
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} | Fixes #5967.
When `Dataset.map()` recombines multiple shards, it drops the source split. It also loses metadata such as `config_name` when the shards infer different compatible features (for example, a new column is null throughout the first shard and integer-valued in the second).
Pass a copy of the source info and ... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/8592 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8592/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8592/comments | https://api.github.com/repos/huggingface/datasets/issues/8592/events | https://github.com/huggingface/datasets/pull/8592 | 5,400,005,252 | PR_kwDODunzps8AAAABC1mmJA | 8,592 | fix(typing): Use Sequence instead of List for path_or_paths type annotations | {
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} | This fixes mypy errors when passing list of paths to `Dataset.from_parquet()`, `from_csv()`, `from_json()`, `from_text()`, and `IterableDataset` equivalents.
**Problem**: `List` is invariant while `Sequence` is covariant, so passing a `List[str]` to a function expecting `Union[PathLike, List[PathLike]]` fails type che... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/8591 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8591/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8591/comments | https://api.github.com/repos/huggingface/datasets/issues/8591/events | https://github.com/huggingface/datasets/pull/8591 | 5,393,719,912 | PR_kwDODunzps8AAAABCwjC6Q | 8,591 | Better error when a column written as null gets values in a later batch | {
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So this does not change what the writer accepts. Before the cast, `ArrowWriter` now ... | {
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Between 4.8.4 and 4.8.5, checksum recording flipped from on to off by default in two places. From the sdists:
```
4.8.4 src/datasets/download/download_manager.py:80 record_checksums=True
4.8.5 src/datasets/download/download_manager.py:80 record_checksums=False
4.8.4 src/datasets/utils/info_ut... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/8589 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8589/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8589/comments | https://api.github.com/repos/huggingface/datasets/issues/8589/events | https://github.com/huggingface/datasets/pull/8589 | 5,390,803,675 | PR_kwDODunzps8AAAABCuN8Og | 8,589 | Advance the user-supplied generator in Dataset.shuffle even on cache hits | {
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"merged_at": "2026-09-10T13:34... | Fixes #7127.
When a `np.random.Generator` is passed to `Dataset.shuffle`, the indices cache lookup returns before `generator.permutation(...)` is called, so the caller's generator never advances on a cache hit. Because the fingerprint is derived from the generator's state, the next call recomputes the same fingerpri... | {
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https://api.github.com/repos/huggingface/datasets/issues/8588 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8588/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8588/comments | https://api.github.com/repos/huggingface/datasets/issues/8588/events | https://github.com/huggingface/datasets/pull/8588 | 5,389,364,699 | PR_kwDODunzps8AAAABCtEBug | 8,588 | Let TranslationVariableLanguages encode without declared languages | {
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} | ### What is wrong
`TranslationVariableLanguages` declares `languages` as optional, but building one without it makes every example fail to encode.
```python
>>> from datasets import Dataset, Features
>>> from datasets.features.translation import TranslationVariableLanguages
>>> TranslationVariableLanguages().encode_e... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/8587 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8587/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8587/comments | https://api.github.com/repos/huggingface/datasets/issues/8587/events | https://github.com/huggingface/datasets/pull/8587 | 5,383,575,889 | PR_kwDODunzps8AAAABCoaFTQ | 8,587 | Preserve formatting selections when flattening nested columns | {
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} | ## What this changes
I've fixed `flatten()` losing a selected struct's formatted columns. Its old name stays in the selection after flattening, so indexing can return an empty batch instead of the selected values.
The fix flattens the selected features alongside the schema. It keeps unselected descendants excluded an... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/8586 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8586/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8586/comments | https://api.github.com/repos/huggingface/datasets/issues/8586/events | https://github.com/huggingface/datasets/pull/8586 | 5,383,163,003 | PR_kwDODunzps8AAAABCoEyUw | 8,586 | Accept a single string for metadata_filenames in folder builders | {
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"followers_url": "https://api.github.com/users/LeSingh1/... | [] | open | false | [] | null | 0 | 2026-09-08T06:42:35 | 2026-09-08T06:42:35 | null | null | CONTRIBUTOR | [] | null | null | false | {
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} | ### The bug
`metadata_filenames` is only ever used as a membership test:
```python
metadata_filenames = self.config.metadata_filenames or self.METADATA_FILENAMES
...
elif os.path.basename(original_file) in metadata_filenames:
```
If it is a bare string rather than a list, `in` becomes a **substring** test:
```pytho... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/8585 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8585/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8585/comments | https://api.github.com/repos/huggingface/datasets/issues/8585/events | https://github.com/huggingface/datasets/pull/8585 | 5,383,127,152 | PR_kwDODunzps8AAAABCoC6tA | 8,585 | Reject a non-callable generator in GeneratorConfig | {
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"merged_at": "2026-09-10T13:39... | ### The bug
`GeneratorConfig` checks that `generator` is not `None`, but not that it is callable. A wrong type is only discovered during generation:
```python
Dataset.from_generator([{"a": 1}])
```
```
DatasetGenerationError: An error occurred while generating the dataset
caused by
TypeError: 'list' object is not ... | {
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https://api.github.com/repos/huggingface/datasets/issues/8584 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8584/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8584/comments | https://api.github.com/repos/huggingface/datasets/issues/8584/events | https://github.com/huggingface/datasets/pull/8584 | 5,383,085,287 | PR_kwDODunzps8AAAABCoAu8A | 8,584 | Fix the xml loader, which cannot load any file | {
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} | ### The bug
`load_dataset("xml", ...)` fails for **every** input:
```python
open("a.xml", "w").write("<root><a>1</a></root>")
load_dataset("xml", data_files="a.xml", split="train")
```
```
DatasetGenerationError: An error occurred while generating the dataset
caused by
FileNotFoundError: [Errno 2] No such file or ... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/8583 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8583/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8583/comments | https://api.github.com/repos/huggingface/datasets/issues/8583/events | https://github.com/huggingface/datasets/pull/8583 | 5,380,921,780 | PR_kwDODunzps8AAAABCmRKAw | 8,583 | Keep every value of nested columns in Dataset.to_csv() | {
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} | `to_csv()` hands the Arrow batch to pandas, and pandas renders a list cell with numpy's repr. So it comes out space separated, and past numpy's summarization threshold of 1000 the middle is elided: a 1500-element list is written as `[ 0 1 2 ... 1497 1498 1499]` and 1494 values are gone. Struct columns and Array... | null | {
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https://api.github.com/repos/huggingface/datasets/issues/8582 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8582/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8582/comments | https://api.github.com/repos/huggingface/datasets/issues/8582/events | https://github.com/huggingface/datasets/pull/8582 | 5,377,672,496 | PR_kwDODunzps8AAAABCjuxsg | 8,582 | fix(benchmarks): rename misspelled read_unformated* helpers to read_unformatted* | {
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} | `benchmarks/benchmark_array_xd.py` defines `read_unformated` / `read_batch_unformated` / `read_col_unformated` (all call sites internal to the file). Renamed to `read_unformatted` / `read_batch_unformatted` / `read_col_unformatted`. | null | {
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https://api.github.com/repos/huggingface/datasets/issues/8581 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8581/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8581/comments | https://api.github.com/repos/huggingface/datasets/issues/8581/events | https://github.com/huggingface/datasets/pull/8581 | 5,377,586,557 | PR_kwDODunzps8AAAABCjqe-w | 8,581 | docs: drop duplicated 'a' in the HubBucketDatasetModuleFactory docstring | {
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} | `src/datasets/load.py`: "dataset loaded from data files of **a a** Storage Bucket" → "of a Storage Bucket". Docs-only. | null | {
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https://api.github.com/repos/huggingface/datasets/issues/8580 | https://api.github.com/repos/huggingface/datasets | https://api.github.com/repos/huggingface/datasets/issues/8580/labels{/name} | https://api.github.com/repos/huggingface/datasets/issues/8580/comments | https://api.github.com/repos/huggingface/datasets/issues/8580/events | https://github.com/huggingface/datasets/pull/8580 | 5,377,584,549 | PR_kwDODunzps8AAAABCjqYqA | 8,580 | docs: point #map anchor links at the process guide | {
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} | `docs/source/about_map_batch.mdx` and `docs/source/stream.mdx` both link an in-page `#map` anchor, but neither file has a Map heading — the "Map" section lives in `docs/source/process.mdx` (`## Map`). Both links now target `/process#map` (doc-builder cross-file style). | null | {
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