Error5 reports
Fix NotImplementedError
in Datasets
✅ Solution
The "NotImplementedError" in datasets often arises when a requested feature or function, like audio decoding or streaming, isn't fully implemented for a specific dataset format or within the current environment. To fix it, either install any missing dependencies required for the unimplemented functionality (e.g., `pip install librosa` for audio decoding) or switch to a dataset format or loading method that fully supports the desired feature in your environment. If using streaming, ensure your environment supports it fully, potentially requiring upgrades or specific configurations.
Related Issues
Real GitHub issues where developers encountered this error:
load_dataset() in 4.0.0 failed when decoding audioJul 29, 2025
NotImplementedError when using streaming=True in Google Colab environmentJul 23, 2025
Dataset lib seems to broke after fssec lib updateMay 15, 2025
NotImplementedError: <class 'datasets.iterable_dataset.RepeatExamplesIterable'> doesn't implement num_shards yetMay 7, 2025
Loading the `laion/filtered-wit` dataset in streaming mode fails on v3.4.0Mar 17, 2025
Timeline
First reported:Mar 17, 2025
Last reported:Jul 29, 2025