Datasets:
File size: 754 Bytes
60afd4a | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 | """Explicit metadata union avoids dropping extension keys during Hub streaming."""
from pathlib import Path
from datasets import DatasetInfo,Value,load_dataset
def attach_schema(card,base_shard,extra_fields):
features=load_dataset('webdataset',data_files={'train':[str(base_shard)]},split='train',streaming=True).features
for name,dtype in extra_fields.items():
target=features['json'];parts=name.split('.')
for part in parts[:-1]:target=target[part]
target[parts[-1]]=Value(dtype) if isinstance(dtype,str) else dtype
schema=DatasetInfo(features=features)._to_yaml_dict()['features']
card['dataset_info']=[dict(config_name=config['config_name'],features=schema) for config in card['configs']]
return features
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