Dataset Viewer issue: FeaturesError

#1
by pyrihtm - opened

Hi! The dataset viewer is not working. It looks like the problem is with the last row. However, json is valid and i'm not sure what causes the error.

Error details:

Error code:   FeaturesError
Exception:    ValueError
Message:      Not able to read records in the JSON file at hf://datasets/pyrihtm/product_100@4b8f1977f841f76ed5a24270c28ee80a01a85185/product_100.json.
Traceback:    Traceback (most recent call last):
                File "/src/services/worker/src/worker/job_runners/split/first_rows.py", line 241, in compute_first_rows_from_streaming_response
                  iterable_dataset = iterable_dataset._resolve_features()
                File "/src/services/worker/.venv/lib/python3.9/site-packages/datasets/iterable_dataset.py", line 2216, in _resolve_features
                  features = _infer_features_from_batch(self.with_format(None)._head())
                File "/src/services/worker/.venv/lib/python3.9/site-packages/datasets/iterable_dataset.py", line 1239, in _head
                  return _examples_to_batch(list(self.take(n)))
                File "/src/services/worker/.venv/lib/python3.9/site-packages/datasets/iterable_dataset.py", line 1389, in __iter__
                  for key, example in ex_iterable:
                File "/src/services/worker/.venv/lib/python3.9/site-packages/datasets/iterable_dataset.py", line 1044, in __iter__
                  yield from islice(self.ex_iterable, self.n)
                File "/src/services/worker/.venv/lib/python3.9/site-packages/datasets/iterable_dataset.py", line 282, in __iter__
                  for key, pa_table in self.generate_tables_fn(**self.kwargs):
                File "/src/services/worker/.venv/lib/python3.9/site-packages/datasets/packaged_modules/json/json.py", line 165, in _generate_tables
                  raise ValueError(f"Not able to read records in the JSON file at {file}.") from None
              ValueError: Not able to read records in the JSON file at hf://datasets/pyrihtm/product_100@4b8f1977f841f76ed5a24270c28ee80a01a85185/product_100.json.

cc @albertvillanova @lhoestq @severo .

Owner

I just noticed it's because I use a list of json objects for one of the columns ("output"). It expects each element to follow the same structure as the first uploaded example. So here my last data row had image: "" structure, although before it has always been image: [{}]

pyrihtm changed discussion status to closed

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