datasets 2.7.0 on Python PyPI

Dataset Features

Multiprocessed dataset builder by @TevenLeScao in #5107
- Load big datasets faster than before using multiprocessing:
```
from datasets import load_dataset
ds = load_dataset("imagenet-1k", num_proc=4)
```
Make torch.Tensor and spacy models cacheable by @mariosasko in #5191
- Function passed to map or filter that uses tensors or pipelines can now be cached
Drop labels in Image and Audio folders if files are on different levels in directory or if there is only one label by @polinaeterna in #5192
TextConfig: added "errors" by @NightMachinery in #5155

Audio setup

Add ffmpeg4 installation instructions in warnings by @polinaeterna in #5167

Docs

Update create image dataset docs by @stevhliu in #5177
add: segmentation guide. by @sayakpaul in #5188
Reword E2E training and inference tips in the vision guides by @sayakpaul in #5217
Add SQL guide by @stevhliu in #5223

General improvements and bug fixes

Add pyproject.toml for black by @mariosasko in #5125
Fix tqdm zip bug by @david1542 in #5120
Install tensorflow-macos dependency conditionally by @albertvillanova in #5124
[TYPO] Update new_dataset_script.py by @cakiki in #5119
Avoid extra cast in class_encode_column by @mariosasko in #5130
Use yaml for issue templates + revamp by @mariosasko in #5116
Update docs once dataset scripts transferred to the Hub by @albertvillanova in #5136
Delete duplicate issue template file by @albertvillanova in #5146
Deprecate num_proc parameter in DownloadManager.extract by @ayushthe1 in #5142
Raise ImportError instead of OSError by @ayushthe1 in #5141
Fix CI require beam by @albertvillanova in #5168
Make iter_files deterministic by @albertvillanova in #5149
Add PB and TB in convert_file_size_to_int by @lhoestq in #5171
Reduce default max writer_batch_size by @mariosasko in #5163
Support dill 0.3.6 by @albertvillanova in #5166
Make filename matching more robust by @riccardobucco in #5128
Preserve None in list type cast in PyArrow 10 by @mariosasko in #5174
Raise ffmpeg warnings only once by @polinaeterna in #5173
Add "ipykernel" to list of co_filenames to remove by @gpucce in #5169
chore: add notebook links to img cls and obj det. by @sayakpaul in #5187
Fix docs about dataset_info in YAML by @albertvillanova in #5194
fsspec lock reset in multiprocessing by @lhoestq in #5159
Add note about the name of a dataset script by @polinaeterna in #5198
Deprecate dummy data generation command by @mariosasko in #5199
Do not sort splits in dataset info by @polinaeterna in #5201
Add missing DownloadConfig.use_auth_token value by @alvarobartt in #5205
Update canonical links to Hub links by @stevhliu in #5203
Refactor CI hub fixtures to use monkeypatch instead of patch by @albertvillanova in #5208
Update github pr docs actions by @mishig25 in #5214
Use hfh hf_hub_url function by @albertvillanova in #5196
Pin typer version in tests to <0.5 to fix Windows CI by @polinaeterna in #5235
Fix shards in IterableDataset.from_generator by @lhoestq in #5233
Fix class name of symbolic link by @riccardobucco in #5126
Make Version hashable by @mariosasko in #5238
Handle ArrowNotImplementedError caused by try_type being Image or Audio in cast by @mariosasko in #5236
Encode path only for old versions of hfh by @lhoestq in #5237
Fix CI require_beam maximum compatible dill version by @albertvillanova in #5212
Support hfh rc version by @lhoestq in #5241
Cleaner error tracebacks for dataset script errors by @mariosasko in #5240

New Contributors

@david1542 made their first contribution in #5120
@ayushthe1 made their first contribution in #5142
@gpucce made their first contribution in #5169
@sayakpaul made their first contribution in #5187
@NightMachinery made their first contribution in #5155

Full Changelog: 2.6.1...2.7.0