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Yanghan Wang authored
Summary: Pull Request resolved: https://github.com/facebookresearch/d2go/pull/185 The `DiskCachedDatasetFromList` was originally in the `d2go/data/utils.py`, so the class is declared by default. Therefore the clean up call (https://fburl.com/code/cu7hswhx) is always called even when the feature is not enabled. This diff move it to a new place and delay the import, so the clean up won't run. Reviewed By: tglik Differential Revision: D34601363 fbshipit-source-id: 734bb9b2c7957d7437ad40c4bfe60a441ec2f23a
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