[Dataset] Dataset Generation Always Returns Cached Version

[benjaminye]

Describe the bug
At dataset creation, the dataset generated will always get the cached version despite change in file.

To Reproduce

1. Run toolkit.py
2. Ctrl-C
3. Add a line in the dataset
4. toolkit.py will not create a new dataset with desired changes

Expected behavior

1. Dataset to be generated with new data

Environment:

• OS: Ubuntu

[benjaminye]

This is caused by huggingface Dataset.from_generator() method checking to see if dataset is cached. See code.

Easiest solution is to pass in a cache_dir parameter (like ./dataset_cache) with each Ingestor class, for example here.

That way whenever there's a change in local file, user can delete the cache directory ./dataset_cache.

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Future Enhancement

• Perhaps we can have a config no_cache under config.data, and the toolkit will go ahead and delete ./dataset_cache directory