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Cannot load the dataset split (in streaming mode) to extract the first rows.
Error code:   StreamingRowsError
Exception:    CastError
Message:      Couldn't cast
schemaVersion: int64
engineMakers: list<item: struct<id: string, name: string, country: string, starts: int64, wins: int64, podiums: in (... 105 chars omitted)
  child 0, item: struct<id: string, name: string, country: string, starts: int64, wins: int64, podiums: int64, poles: (... 93 chars omitted)
      child 0, id: string
      child 1, name: string
      child 2, country: string
      child 3, starts: int64
      child 4, wins: int64
      child 5, podiums: int64
      child 6, poles: int64
      child 7, fastestLaps: int64
      child 8, titles: int64
      child 9, points: double
      child 10, firstYear: int64
      child 11, lastYear: int64
tyreMakers: list<item: struct<id: string, name: string, country: string, starts: int64, wins: int64, podiums: in (... 105 chars omitted)
  child 0, item: struct<id: string, name: string, country: string, starts: int64, wins: int64, podiums: int64, poles: (... 93 chars omitted)
      child 0, id: string
      child 1, name: string
      child 2, country: string
      child 3, starts: int64
      child 4, wins: int64
      child 5, podiums: int64
      child 6, poles: int64
      child 7, fastestLaps: int64
      child 8, titles: int64
      child 9, points: double
      child 10, firstYear: int64
      child 11, lastYear: int64
engineSeasons: list<item: struct<year: int64, maker: int64, pos: int64, starts: int64, wins: int64, podiums: int64, (... 31 chars omitted)
  child 0, item: struct<year: int64, maker: int64, pos: int64, start
...
list<item: int64>
      child 0, item: int64
  child 4, corners: list<item: struct<number: int64, name: null, x: int64, y: int64>>
      child 0, item: struct<number: int64, name: null, x: int64, y: int64>
          child 0, number: int64
          child 1, name: null
          child 2, x: int64
          child 3, y: int64
catalunya: struct<session: string, rotation: double, x: list<item: int64>, y: list<item: int64>, corners: list< (... 61 chars omitted)
  child 0, session: string
  child 1, rotation: double
  child 2, x: list<item: int64>
      child 0, item: int64
  child 3, y: list<item: int64>
      child 0, item: int64
  child 4, corners: list<item: struct<number: int64, name: null, x: int64, y: int64>>
      child 0, item: struct<number: int64, name: null, x: int64, y: int64>
          child 0, number: int64
          child 1, name: null
          child 2, x: int64
          child 3, y: int64
melbourne: struct<session: string, rotation: double, x: list<item: int64>, y: list<item: int64>, corners: list< (... 61 chars omitted)
  child 0, session: string
  child 1, rotation: double
  child 2, x: list<item: int64>
      child 0, item: int64
  child 3, y: list<item: int64>
      child 0, item: int64
  child 4, corners: list<item: struct<number: int64, name: null, x: int64, y: int64>>
      child 0, item: struct<number: int64, name: null, x: int64, y: int64>
          child 0, number: int64
          child 1, name: null
          child 2, x: int64
          child 3, y: int64
to
{'austin': {'session': Value('string'), 'rotation': Value('float64'), 'x': List(Value('int64')), 'y': List(Value('int64')), 'corners': List({'number': Value('int64'), 'name': Value('null'), 'x': Value('int64'), 'y': Value('int64')})}, 'bahrain': {'session': Value('string'), 'rotation': Value('float64'), 'x': List(Value('int64')), 'y': List(Value('int64')), 'corners': List({'number': Value('int64'), 'name': Value('null'), 'x': Value('int64'), 'y': Value('int64')})}, 'baku': {'session': Value('string'), 'rotation': Value('float64'), 'x': List(Value('int64')), 'y': List(Value('int64')), 'corners': List({'number': Value('int64'), 'name': Value('null'), 'x': Value('int64'), 'y': Value('int64')})}, 'catalunya': {'session': Value('string'), 'rotation': Value('float64'), 'x': List(Value('int64')), 'y': List(Value('int64')), 'corners': List({'number': Value('int64'), 'name': Value('null'), 'x': Value('int64'), 'y': Value('int64')})}, 'hungaroring': {'session': Value('string'), 'rotation': Value('float64'), 'x': List(Value('int64')), 'y': List(Value('int64')), 'corners': List({'number': Value('int64'), 'name': Value('null'), 'x': Value('int64'), 'y': Value('int64')})}, 'imola': {'session': Value('string'), 'rotation': Value('float64'), 'x': List(Value('int64')), 'y': List(Value('int64')), 'corners': List({'number': Value('int64'), 'name': Value('null'), 'x': Value('int64'), 'y': Value('int64')})}, 'interlagos': {'session': Value('string'), 'rotation': Value('float64'), 'x': List(Value(
...
), 'name': Value('null'), 'x': Value('int64'), 'y': Value('int64')})}, 'silverstone': {'session': Value('string'), 'rotation': Value('float64'), 'x': List(Value('int64')), 'y': List(Value('int64')), 'corners': List({'number': Value('int64'), 'name': Value('null'), 'x': Value('int64'), 'y': Value('int64')})}, 'spa-francorchamps': {'session': Value('string'), 'rotation': Value('float64'), 'x': List(Value('int64')), 'y': List(Value('int64')), 'corners': List({'number': Value('int64'), 'name': Value('null'), 'x': Value('int64'), 'y': Value('int64')})}, 'spielberg': {'session': Value('string'), 'rotation': Value('float64'), 'x': List(Value('int64')), 'y': List(Value('int64')), 'corners': List({'number': Value('int64'), 'name': Value('null'), 'x': Value('int64'), 'y': Value('int64')})}, 'suzuka': {'session': Value('string'), 'rotation': Value('float64'), 'x': List(Value('int64')), 'y': List(Value('int64')), 'corners': List({'number': Value('int64'), 'name': Value('null'), 'x': Value('int64'), 'y': Value('int64')})}, 'yas-marina': {'session': Value('string'), 'rotation': Value('float64'), 'x': List(Value('int64')), 'y': List(Value('int64')), 'corners': List({'number': Value('int64'), 'name': Value('null'), 'x': Value('int64'), 'y': Value('int64')})}, 'zandvoort': {'session': Value('string'), 'rotation': Value('float64'), 'x': List(Value('int64')), 'y': List(Value('int64')), 'corners': List({'number': Value('int64'), 'name': Value('null'), 'x': Value('int64'), 'y': Value('int64')})}}
because column names don't match
Traceback:    Traceback (most recent call last):
                File "/src/services/worker/src/worker/utils.py", line 147, in get_rows_or_raise
                  return get_rows(
                      dataset=dataset,
                  ...<4 lines>...
                      column_names=column_names,
                  )
                File "/src/libs/libcommon/src/libcommon/utils.py", line 272, in decorator
                  return func(*args, **kwargs)
                File "/src/services/worker/src/worker/utils.py", line 127, in get_rows
                  rows_plus_one = list(itertools.islice(safe_iter(ds, dataset=dataset), rows_max_number + 1))
                File "/src/services/worker/src/worker/utils.py", line 483, in safe_iter
                  yield from ds.decode(False) if ds.features else ds
                File "/usr/local/lib/python3.14/site-packages/datasets/iterable_dataset.py", line 2951, in __iter__
                  for key, example in ex_iterable:
                                      ^^^^^^^^^^^
                File "/usr/local/lib/python3.14/site-packages/datasets/iterable_dataset.py", line 2461, in __iter__
                  for key, pa_table in self._iter_arrow():
                                       ~~~~~~~~~~~~~~~~^^
                File "/usr/local/lib/python3.14/site-packages/datasets/iterable_dataset.py", line 2486, in _iter_arrow
                  for key, pa_table in self.ex_iterable._iter_arrow():
                                       ~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^
                File "/usr/local/lib/python3.14/site-packages/datasets/iterable_dataset.py", line 547, in _iter_arrow
                  for key, pa_table in iterator:
                                       ^^^^^^^^
                File "/usr/local/lib/python3.14/site-packages/datasets/iterable_dataset.py", line 430, in _iter_arrow
                  for key, pa_table in self.generate_tables_fn(**gen_kwags):
                                       ~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^
                File "/usr/local/lib/python3.14/site-packages/datasets/packaged_modules/json/json.py", line 343, in _generate_tables
                  self._cast_table(pa_table, json_field_paths=json_field_paths),
                  ~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
                File "/usr/local/lib/python3.14/site-packages/datasets/packaged_modules/json/json.py", line 132, in _cast_table
                  pa_table = table_cast(pa_table, self.info.features.arrow_schema)
                File "/usr/local/lib/python3.14/site-packages/datasets/table.py", line 2378, in table_cast
                  return cast_table_to_schema(table, schema)
                File "/usr/local/lib/python3.14/site-packages/datasets/table.py", line 2306, in cast_table_to_schema
                  raise CastError(
                  ...<3 lines>...
                  )
              datasets.table.CastError: Couldn't cast
              schemaVersion: int64
              engineMakers: list<item: struct<id: string, name: string, country: string, starts: int64, wins: int64, podiums: in (... 105 chars omitted)
                child 0, item: struct<id: string, name: string, country: string, starts: int64, wins: int64, podiums: int64, poles: (... 93 chars omitted)
                    child 0, id: string
                    child 1, name: string
                    child 2, country: string
                    child 3, starts: int64
                    child 4, wins: int64
                    child 5, podiums: int64
                    child 6, poles: int64
                    child 7, fastestLaps: int64
                    child 8, titles: int64
                    child 9, points: double
                    child 10, firstYear: int64
                    child 11, lastYear: int64
              tyreMakers: list<item: struct<id: string, name: string, country: string, starts: int64, wins: int64, podiums: in (... 105 chars omitted)
                child 0, item: struct<id: string, name: string, country: string, starts: int64, wins: int64, podiums: int64, poles: (... 93 chars omitted)
                    child 0, id: string
                    child 1, name: string
                    child 2, country: string
                    child 3, starts: int64
                    child 4, wins: int64
                    child 5, podiums: int64
                    child 6, poles: int64
                    child 7, fastestLaps: int64
                    child 8, titles: int64
                    child 9, points: double
                    child 10, firstYear: int64
                    child 11, lastYear: int64
              engineSeasons: list<item: struct<year: int64, maker: int64, pos: int64, starts: int64, wins: int64, podiums: int64, (... 31 chars omitted)
                child 0, item: struct<year: int64, maker: int64, pos: int64, start
              ...
              list<item: int64>
                    child 0, item: int64
                child 4, corners: list<item: struct<number: int64, name: null, x: int64, y: int64>>
                    child 0, item: struct<number: int64, name: null, x: int64, y: int64>
                        child 0, number: int64
                        child 1, name: null
                        child 2, x: int64
                        child 3, y: int64
              catalunya: struct<session: string, rotation: double, x: list<item: int64>, y: list<item: int64>, corners: list< (... 61 chars omitted)
                child 0, session: string
                child 1, rotation: double
                child 2, x: list<item: int64>
                    child 0, item: int64
                child 3, y: list<item: int64>
                    child 0, item: int64
                child 4, corners: list<item: struct<number: int64, name: null, x: int64, y: int64>>
                    child 0, item: struct<number: int64, name: null, x: int64, y: int64>
                        child 0, number: int64
                        child 1, name: null
                        child 2, x: int64
                        child 3, y: int64
              melbourne: struct<session: string, rotation: double, x: list<item: int64>, y: list<item: int64>, corners: list< (... 61 chars omitted)
                child 0, session: string
                child 1, rotation: double
                child 2, x: list<item: int64>
                    child 0, item: int64
                child 3, y: list<item: int64>
                    child 0, item: int64
                child 4, corners: list<item: struct<number: int64, name: null, x: int64, y: int64>>
                    child 0, item: struct<number: int64, name: null, x: int64, y: int64>
                        child 0, number: int64
                        child 1, name: null
                        child 2, x: int64
                        child 3, y: int64
              to
              {'austin': {'session': Value('string'), 'rotation': Value('float64'), 'x': List(Value('int64')), 'y': List(Value('int64')), 'corners': List({'number': Value('int64'), 'name': Value('null'), 'x': Value('int64'), 'y': Value('int64')})}, 'bahrain': {'session': Value('string'), 'rotation': Value('float64'), 'x': List(Value('int64')), 'y': List(Value('int64')), 'corners': List({'number': Value('int64'), 'name': Value('null'), 'x': Value('int64'), 'y': Value('int64')})}, 'baku': {'session': Value('string'), 'rotation': Value('float64'), 'x': List(Value('int64')), 'y': List(Value('int64')), 'corners': List({'number': Value('int64'), 'name': Value('null'), 'x': Value('int64'), 'y': Value('int64')})}, 'catalunya': {'session': Value('string'), 'rotation': Value('float64'), 'x': List(Value('int64')), 'y': List(Value('int64')), 'corners': List({'number': Value('int64'), 'name': Value('null'), 'x': Value('int64'), 'y': Value('int64')})}, 'hungaroring': {'session': Value('string'), 'rotation': Value('float64'), 'x': List(Value('int64')), 'y': List(Value('int64')), 'corners': List({'number': Value('int64'), 'name': Value('null'), 'x': Value('int64'), 'y': Value('int64')})}, 'imola': {'session': Value('string'), 'rotation': Value('float64'), 'x': List(Value('int64')), 'y': List(Value('int64')), 'corners': List({'number': Value('int64'), 'name': Value('null'), 'x': Value('int64'), 'y': Value('int64')})}, 'interlagos': {'session': Value('string'), 'rotation': Value('float64'), 'x': List(Value(
              ...
              ), 'name': Value('null'), 'x': Value('int64'), 'y': Value('int64')})}, 'silverstone': {'session': Value('string'), 'rotation': Value('float64'), 'x': List(Value('int64')), 'y': List(Value('int64')), 'corners': List({'number': Value('int64'), 'name': Value('null'), 'x': Value('int64'), 'y': Value('int64')})}, 'spa-francorchamps': {'session': Value('string'), 'rotation': Value('float64'), 'x': List(Value('int64')), 'y': List(Value('int64')), 'corners': List({'number': Value('int64'), 'name': Value('null'), 'x': Value('int64'), 'y': Value('int64')})}, 'spielberg': {'session': Value('string'), 'rotation': Value('float64'), 'x': List(Value('int64')), 'y': List(Value('int64')), 'corners': List({'number': Value('int64'), 'name': Value('null'), 'x': Value('int64'), 'y': Value('int64')})}, 'suzuka': {'session': Value('string'), 'rotation': Value('float64'), 'x': List(Value('int64')), 'y': List(Value('int64')), 'corners': List({'number': Value('int64'), 'name': Value('null'), 'x': Value('int64'), 'y': Value('int64')})}, 'yas-marina': {'session': Value('string'), 'rotation': Value('float64'), 'x': List(Value('int64')), 'y': List(Value('int64')), 'corners': List({'number': Value('int64'), 'name': Value('null'), 'x': Value('int64'), 'y': Value('int64')})}, 'zandvoort': {'session': Value('string'), 'rotation': Value('float64'), 'x': List(Value('int64')), 'y': List(Value('int64')), 'corners': List({'number': Value('int64'), 'name': Value('null'), 'x': Value('int64'), 'y': Value('int64')})}}
              because column names don't match

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Unbox Box F1 session data

Static JSON served to the Unbox Box web app: per-session metadata, resampled lap telemetry and race replays, plus all-time history.

Sources: TracingInsights (MIT for 2023–2024, Apache-2.0 from 2025; FastF1-derived) and F1DB (CC BY 4.0, Marcel Overdijk and contributors). Data was converted and resampled. Unofficial fan project, not affiliated with Formula 1 companies. See DATA_LICENSE.md for details.

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