2.14.0

Important: caching

• Datasets downloaded and cached using datasets>=2.14.0 may not be reloaded from cache using older version of datasets (and therefore re-downloaded).
• Datasets that were already cached are still supported.
• This affects datasets on Hugging Face without dataset scripts, e.g. made of pure parquet, csv, jsonl, etc. files.
• This is due to the default configuration name for those datasets have been fixed (from "username--dataset_name" to "default") in #5331.

Dataset Configuration

• Support for multiple configs via metadata yaml info by @polinaeterna in #5331

  • Configure your dataset using YAML at the top of your dataset card (docs here)
  • Choose which file goes into which split

    ---
    configs:
    - config_name: default
      data_files:
      - split: train
         path: data.csv
      - split: test
          path: holdout.csv
    ---

  • Define multiple dataset configurations

    ---
    configs:
    - config_name: main_data
      data_files: main_data.csv
    - config_name: additional_data
      data_files: additional_data.csv
    ---

Dataset Features

• Support for multiple configs via metadata yaml info by @polinaeterna in #5331

  • push_to_hub() additional dataset configurations

  ds.push_to_hub("username/dataset_name", config_name="additional_data")
  # reload later
  ds = load_dataset("username/dataset_name", "additional_data")

• Support returning dataframe in map transform by @mariosasko in #5995

What's Changed

• Deprecate errors param in favor of encoding_errors in text builder by @mariosasko in #5974
• Fix select_columns columns order by @lhoestq in #5994
• Replace metadata utils with huggingface_hub's RepoCard API by @mariosasko in #5949
• Pin joblib to avoid joblibspark test failures by @mariosasko in #6000
• Align column_names type check with type hint in sort by @mariosasko in #6001
• Deprecate use_auth_token in favor of token by @mariosasko in #5996
• Drop Python 3.7 support by @mariosasko in #6005
• Misc improvements by @mariosasko in #6004
• Make IterableDataset.from_spark more efficient by @mathewjacob1002 in #5986
• Fix cast for dictionaries with no keys by @mariosasko in #6009
• Avoid stuck map operation when subprocesses crashes by @pappacena in #5976
• Deprecate task api by @mariosasko in #5865
• Add metadata ui screenshot in docs by @lhoestq in #6015
• Fix ClassLabel min max check for None values by @mariosasko in #6023
• [docs] Update return statement of index search by @stevhliu in #6021
• Improve logging by @mariosasko in #6019
• Fix style with ruff 0.0.278 by @lhoestq in #6026
• Don't reference self in Spark._validate_cache_dir by @maddiedawson in #6024
• Delete task_templates in IterableDataset when they are no longer valid by @mariosasko in #6027
• [docs] Fix link by @stevhliu in #6029
• fixed typo in comment by @NightMachinery in #6030
• Fix legacy_dataset_infos by @lhoestq in #6040
• Flatten repository_structure docs on yaml by @lhoestq in #6041
• Use new hffs by @lhoestq in #6028
• Bump dev version by @lhoestq in #6047
• Fix unused DatasetInfosDict code in push_to_hub by @lhoestq in #6042
• Rename "pattern" to "path" in YAML data_files configs by @lhoestq in #6044
• Remove HfFileSystem and deprecate S3FileSystem by @mariosasko in #6052
• Dill 3.7 support by @mariosasko in #6061
• Improve Dataset.from_list docstring by @mariosasko in #6062
• Check if column names match in Parquet loader only when config features are specified by @mariosasko in #6045
• Release: 2.14.0 by @lhoestq in #6063

New Contributors

• @mathewjacob1002 made their first contribution in #5986
• @pappacena made their first contribution in #5976

Full Changelog: 2.13.1...2.14.0