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pyarrow.lib.ArrowTypeError: Expected dict key of type str or bytes, got 'int' #7446

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rangehow opened this issue Mar 12, 2025 · 0 comments

rangehow commented Mar 12, 2025

Describe the bug

A dict with its keys are all str but get following error

test_data=[{'input_ids':[1,2,3],'labels':[[Counter({2:1})]]}]
dataset = datasets.Dataset.from_list(test_data)

pyarrow.lib.ArrowTypeError: Expected dict key of type str or bytes, got 'int'

Steps to reproduce the bug

.

Expected behavior

.

Environment info

datasets 3.3.2

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