*** pubmed_dataset_streamed and law_dataset_streamed can not be combined by islice() function**
from itertools import islice
from datasets import interleave_datasetscombined_dataset = interleave_datasets([pubmed_dataset_streamed, law_dataset_streamed])
list(islice(combined_dataset, 2))
ValueError: The features can’t be aligned because the key meta of features {‘meta’: {‘case_ID’: Value(dtype=‘string’, id=None), ‘case_jurisdiction’: Value(dtype=‘string’, id=None), ‘date_created’: Value(dtype=‘string’, id=None)}, ‘text’: Value(dtype=‘string’, id=None)} has unexpected type - {‘case_ID’: Value(dtype=‘string’, id=None), ‘case_jurisdiction’: Value(dtype=‘string’, id=None), ‘date_created’: Value(dtype=‘string’, id=None)} (expected either {‘pmid’: Value(dtype=‘int64’, id=None), ‘language’: Value(dtype=‘string’, id=None)} or Value(“null”).