The dataset viewer is not available for this split.
Cannot load the dataset split (in streaming mode) to extract the first rows.
Error code: StreamingRowsError
Exception: CastError
Message: Couldn't cast
ticker: string
ex_dividend_date: date32[day]
amount: double
to
{'symbol': Value('string'), 'ex_date': Value('date32'), 'split_ratio': Value('float64'), 'dividend_cash': Value('float64'), 'div_price_ratio': Value('float64'), 'currency': Value('string'), 'source': Value('string')}
because column names don't match
Traceback: Traceback (most recent call last):
File "/src/services/worker/src/worker/utils.py", line 149, 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 129, 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 544, 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 3052, in __iter__
for key, example in ex_iterable:
^^^^^^^^^^^
File "/usr/local/lib/python3.14/site-packages/datasets/iterable_dataset.py", line 2559, in __iter__
for key, pa_table in self._iter_arrow():
~~~~~~~~~~~~~~~~^^
File "/usr/local/lib/python3.14/site-packages/datasets/iterable_dataset.py", line 2584, 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 558, in _iter_arrow
for key, pa_table in iterator:
^^^^^^^^
File "/usr/local/lib/python3.14/site-packages/datasets/iterable_dataset.py", line 440, 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/parquet/parquet.py", line 220, in _generate_tables
yield Key(file_idx, batch_idx), self._cast_table(pa_table)
~~~~~~~~~~~~~~~~^^^^^^^^^^
File "/usr/local/lib/python3.14/site-packages/datasets/packaged_modules/parquet/parquet.py", line 156, 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 2381, in table_cast
return cast_table_to_schema(table, schema)
File "/usr/local/lib/python3.14/site-packages/datasets/table.py", line 2309, in cast_table_to_schema
raise CastError(
...<3 lines>...
)
datasets.table.CastError: Couldn't cast
ticker: string
ex_dividend_date: date32[day]
amount: double
to
{'symbol': Value('string'), 'ex_date': Value('date32'), 'split_ratio': Value('float64'), 'dividend_cash': Value('float64'), 'div_price_ratio': Value('float64'), 'currency': Value('string'), 'source': Value('string')}
because column names don't matchNeed help to make the dataset viewer work? Make sure to review how to configure the dataset viewer, and open a discussion for direct support.
LiveOption Sample Data
Sample market, earnings, calendar and news data prepared for QFinZero demos.
Download
hf download haochen111/LiveOption-Sample --repo-type dataset --local-dir ./liveoption-sample
The downloaded folder is a QFinZero data root. Set QFZ_DATA_ROOT to its absolute path.
Contents
- SPY: 2025-01-01 through 2026-06-26, with daily warmup history.
- Full intraday option sessions: 2025-04-03, 04-04, 04-07, 04-09 and 04-10.
- Other SPY option sessions: the final 40 regular-session minutes.
- Four earnings replay windows: NVDA, TSLA, META and AAPL.
- 71 earnings records, 2022-01-26 through 2026-04-30.
- 2,404 US economic-calendar records, 2022-01-05 through 2026-02-17.
- 54 news articles with complete text.
Start QFinZero
export QFZ_DATA_ROOT=/absolute/path/to/this/folder
export EARNINGS_DB="$QFZ_DATA_ROOT/esp/nasdaq_earnings.sqlite3"
export ESP_EARNINGS_DB="$EARNINGS_DB"
export ESP_NEWS_BACKEND=sqlite
qfz-server
Use a QFinZero API key to connect LiveOption to the hub. Full-session intraday tasks require one of the covered dates. On other full SPY sessions, use a daily checkpoint such as 15:30 ET; the option window follows early closes.
News formats
esp/news.jsonl:titleandcontextonly.esp/news-index.jsonl: publication time, tickers and content lookup.esp/news.mongo.jsonl: QFinZero-compatible MongoDB Extended JSON.esp/news.sqlite3: complete context stored in the description field.
For native full-content queries, import the MongoDB file into a separate demo
collection and configure ESP_NEWS_BACKEND=mongo, ESP_MONGO_DB and
ESP_MONGO_COLLECTION. QFinZero v1.0.2 classifies the SQLite description as a
summary. See manifest.json for exact coverage and checksums.
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