Fix NumPy array value error in MetaDataset.init_seq_order#1825
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albertz
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May 23, 2026
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When configuring a dataset with multiple loading or post-processing workers (
num_data_loading_workers > 1),self._current_seq_ordergets distributed as a NumPy array containing sequence indices.In
MetaDataset.init_seq_order, evaluatingnot self._current_seq_orderattempts to resolve the truth value of a multi-element array, which is ambiguous in NumPy and throws a runtimeValueError. This causes the background loader processes to crash.The current solution is tested.