[Fix] Fix split detection#1714
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wangxingjun778 merged 3 commits intoMay 13, 2026
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This pull request enhances split discovery for Hugging Face datasets by introducing a dry-run mechanism that extracts split names without performing actual I/O. It adds a _DryRunDownloadManager stub and updates _validate_split_exists and load_dataset to utilize this discovery method as a fallback for script-based datasets. The review feedback suggests enhancing cross-platform compatibility by using os.devnull, adding support for set types in the download manager, improving observability through debug logging of discovery errors, and ensuring robustness by handling list-based builder_configs.
Jintao-Huang
approved these changes
May 13, 2026
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_DryRunDownloadManagerstub to facilitate lightweight split detection.load_datasetand_validate_split_existsto utilize the dry-run method as a fallback for script-based datasets.os.devnull.settypes within the download manager operations.builder_configs.