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The dataset generation failed
Error code: DatasetGenerationError
Exception: TypeError
Message: Couldn't cast array of type
struct<GDX: double, GLD: double, HYG: double, IWD: double, IWF: double, IWM: double, IWO: double, LQD: double, QQQ: double, SLV: double, SMH: double, SOXX: double, SPY: double, TLT: double, VCIT: double, VNQ: double, XBI: double, XLB: double, XLE: double, XLF: double, XLI: double, XLK: double, XLP: double, XLU: double, XLV: double, XLY: double, XME: double, XSD: double, CASH: double>
to
{'GDX': Value('float64'), 'GLD': Value('float64'), 'HYG': Value('float64'), 'IWF': Value('float64'), 'IWM': Value('float64'), 'LQD': Value('float64'), 'QQQ': Value('float64'), 'SLV': Value('float64'), 'SPY': Value('float64'), 'TLT': Value('float64'), 'VCIT': Value('float64'), 'VNQ': Value('float64'), 'XBI': Value('float64'), 'XLE': Value('float64'), 'XLF': Value('float64'), 'XLI': Value('float64'), 'XLK': Value('float64'), 'XLP': Value('float64'), 'XLU': Value('float64'), 'XLV': Value('float64'), 'XLY': Value('float64'), 'XME': Value('float64'), 'XSD': Value('float64'), 'CASH': Value('float64')}
Traceback: Traceback (most recent call last):
File "/usr/local/lib/python3.14/site-packages/datasets/builder.py", line 1827, in _prepare_split_single
for key, table in generator:
^^^^^^^^^
File "/src/services/worker/src/worker/job_runners/config/parquet_and_info.py", line 613, in wrapped
for item in generator(*args, **kwargs):
~~~~~~~~~^^^^^^^^^^^^^^^^^
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 2312, in cast_table_to_schema
cast_array_to_feature(
~~~~~~~~~~~~~~~~~~~~~^
table[name] if name in table_column_names else pa.array([None] * len(table), type=schema.field(name).type),
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
feature,
^^^^^^^^
)
^
File "/usr/local/lib/python3.14/site-packages/datasets/table.py", line 1861, in wrapper
return pa.chunked_array([func(chunk, *args, **kwargs) for chunk in array.chunks])
~~~~^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/local/lib/python3.14/site-packages/datasets/table.py", line 2158, in cast_array_to_feature
raise TypeError(f"Couldn't cast array of type\n{_short_str(array.type)}\nto\n{_short_str(feature)}")
TypeError: Couldn't cast array of type
struct<GDX: double, GLD: double, HYG: double, IWD: double, IWF: double, IWM: double, IWO: double, LQD: double, QQQ: double, SLV: double, SMH: double, SOXX: double, SPY: double, TLT: double, VCIT: double, VNQ: double, XBI: double, XLB: double, XLE: double, XLF: double, XLI: double, XLK: double, XLP: double, XLU: double, XLV: double, XLY: double, XME: double, XSD: double, CASH: double>
to
{'GDX': Value('float64'), 'GLD': Value('float64'), 'HYG': Value('float64'), 'IWF': Value('float64'), 'IWM': Value('float64'), 'LQD': Value('float64'), 'QQQ': Value('float64'), 'SLV': Value('float64'), 'SPY': Value('float64'), 'TLT': Value('float64'), 'VCIT': Value('float64'), 'VNQ': Value('float64'), 'XBI': Value('float64'), 'XLE': Value('float64'), 'XLF': Value('float64'), 'XLI': Value('float64'), 'XLK': Value('float64'), 'XLP': Value('float64'), 'XLU': Value('float64'), 'XLV': Value('float64'), 'XLY': Value('float64'), 'XME': Value('float64'), 'XSD': Value('float64'), 'CASH': Value('float64')}
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "/src/services/worker/src/worker/job_runners/config/parquet_and_info.py", line 1369, in compute_config_parquet_and_info_response
parquet_operations, partial, estimated_dataset_info = stream_convert_to_parquet(
~~~~~~~~~~~~~~~~~~~~~~~~~^
builder, max_dataset_size_bytes=max_dataset_size_bytes
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
)
^
File "/src/services/worker/src/worker/job_runners/config/parquet_and_info.py", line 948, in stream_convert_to_parquet
builder._prepare_split(split_generator=splits_generators[split], file_format="parquet")
~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/local/lib/python3.14/site-packages/datasets/builder.py", line 1694, in _prepare_split
for job_id, done, content in self._prepare_split_single(
~~~~~~~~~~~~~~~~~~~~~~~~~~^
gen_kwargs=gen_kwargs, job_id=job_id, **_prepare_split_args
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
):
^
File "/usr/local/lib/python3.14/site-packages/datasets/builder.py", line 1880, in _prepare_split_single
raise DatasetGenerationError("An error occurred while generating the dataset") from e
datasets.exceptions.DatasetGenerationError: An error occurred while generating the datasetNeed help to make the dataset viewer work? Make sure to review how to configure the dataset viewer, and open a discussion for direct support.
run_date timestamp[s] | universe string | summary dict | rebalances list | latest_weights dict | latest_date timestamp[s] |
|---|---|---|---|---|---|
2026-05-06T00:00:00 | COMBINED | {
"ann_return": 0.05342,
"ann_vol": 0.104142,
"sortino": 0.6308,
"max_drawdown": -0.250548,
"cumulative_return": 1.483926,
"n_rebalances": 202,
"universe": "COMBINED"
} | [
{
"date": "2010-02-19T00:00:00",
"assets": [
"HYG",
"IWF",
"XBI",
"XLP",
"XLU",
"XLV",
"XLY",
"CASH"
],
"weights": [
0.09686896983509301,
0.048023494486193606,
0.34241020292259083,
0.14276700003001677,
0.0544158051712353,
... | {
"GDX": 0,
"GLD": 0,
"HYG": 0.07979099636689857,
"IWF": 0,
"IWM": 0,
"LQD": 0.08268430764293674,
"QQQ": 0,
"SLV": 0,
"SPY": 0,
"TLT": 0.07317964270807334,
"VCIT": 0.09854626827231722,
"VNQ": 0,
"XBI": 0,
"XLE": 0.16320379117111367,
"XLF": 0,
"XLI": 0,
"XLK": 0,
"XLP": 0.059981116145... | 2026-05-06T00:00:00 |
2026-05-06T00:00:00 | EQUITY_SECTORS | {"ann_return":0.084442,"ann_vol":0.142984,"sortino":0.7298,"max_drawdown":-0.251889,"cumulative_retu(...TRUNCATED) | [{"date":"2010-02-19T00:00:00","assets":["SPY","XLV","XLY","XLP","XLU","IWF","XBI","CASH"],"weights"(...TRUNCATED) | {"GDX":0.0,"GLD":null,"HYG":null,"IWF":0.0,"IWM":0.0,"LQD":null,"QQQ":0.0,"SLV":null,"SPY":0.0510192(...TRUNCATED) | 2026-05-06T00:00:00 |
2026-05-07T00:00:00 | COMBINED | {"ann_return":0.05486,"ann_vol":0.1207,"sortino":0.5577,"max_drawdown":-0.284877,"cumulative_return"(...TRUNCATED) | [{"date":"2010-02-19T00:00:00","assets":["HYG","IWF","XBI","XLP","XLU","XLV","XSD","CASH"],"weights"(...TRUNCATED) | {"GDX":0.0,"GLD":0.0,"HYG":0.04642460979818733,"IWF":0.0,"IWM":0.0,"LQD":0.047896037735819436,"QQQ":(...TRUNCATED) | 2026-05-06T00:00:00 |
2026-05-07T00:00:00 | EQUITY_SECTORS | {"ann_return":0.078486,"ann_vol":0.152121,"sortino":0.6388,"max_drawdown":-0.277801,"cumulative_retu(...TRUNCATED) | [{"date":"2010-02-19T00:00:00","assets":["SPY","XLV","XLY","XLP","XLU","IWF","XBI","CASH"],"weights"(...TRUNCATED) | {"GDX":0.0,"GLD":null,"HYG":null,"IWF":0.0,"IWM":0.0,"LQD":null,"QQQ":0.0,"SLV":null,"SPY":0.0314866(...TRUNCATED) | 2026-05-06T00:00:00 |
2026-05-08T00:00:00 | COMBINED | {"ann_return":0.054218,"ann_vol":0.120715,"sortino":0.5512,"max_drawdown":-0.284879,"cumulative_retu(...TRUNCATED) | [{"date":"2010-02-19T00:00:00","assets":["HYG","IWF","XBI","XLP","XLU","XLV","XSD","CASH"],"weights"(...TRUNCATED) | {"GDX":0.0,"GLD":0.0,"HYG":0.046424775346494154,"IWF":0.0,"IWM":0.0,"LQD":0.047896015053895735,"QQQ"(...TRUNCATED) | 2026-05-07T00:00:00 |
2026-05-08T00:00:00 | EQUITY_SECTORS | {"ann_return":0.077818,"ann_vol":0.152119,"sortino":0.6336,"max_drawdown":-0.277802,"cumulative_retu(...TRUNCATED) | [{"date":"2010-02-19T00:00:00","assets":["SPY","XLV","XLY","XLP","XLU","IWF","XBI","CASH"],"weights"(...TRUNCATED) | {"GDX":0.0,"GLD":null,"HYG":null,"IWF":0.0,"IWM":0.0,"LQD":null,"QQQ":0.0,"SLV":null,"SPY":0.0314866(...TRUNCATED) | 2026-05-07T00:00:00 |
2026-05-09T00:00:00 | COMBINED | {"ann_return":0.0555,"ann_vol":0.120814,"sortino":0.5643,"max_drawdown":-0.284877,"cumulative_return(...TRUNCATED) | [{"date":"2010-02-19T00:00:00","assets":["HYG","IWF","XBI","XLP","XLU","XLV","XSD","CASH"],"weights"(...TRUNCATED) | {"GDX":0.0,"GLD":0.0,"HYG":0.046424619088659025,"IWF":0.0,"IWM":0.0,"LQD":0.04789605210384173,"QQQ":(...TRUNCATED) | 2026-05-08T00:00:00 |
2026-05-09T00:00:00 | EQUITY_SECTORS | {"ann_return":0.078944,"ann_vol":0.152174,"sortino":0.6427,"max_drawdown":-0.277802,"cumulative_retu(...TRUNCATED) | [{"date":"2010-02-19T00:00:00","assets":["SPY","XLV","XLY","XLP","XLU","IWF","XBI","CASH"],"weights"(...TRUNCATED) | {"GDX":0.0,"GLD":null,"HYG":null,"IWF":0.0,"IWM":0.0,"LQD":null,"QQQ":0.0,"SLV":null,"SPY":0.0314866(...TRUNCATED) | 2026-05-08T00:00:00 |
2026-05-11T00:00:00 | COMBINED | {"ann_return":0.0555,"ann_vol":0.120814,"sortino":0.5643,"max_drawdown":-0.284877,"cumulative_return(...TRUNCATED) | [{"date":"2010-02-19T00:00:00","assets":["HYG","IWF","XBI","XLP","XLU","XLV","XSD","CASH"],"weights"(...TRUNCATED) | {"GDX":0.0,"GLD":0.0,"HYG":0.046424619088659025,"IWF":0.0,"IWM":0.0,"LQD":0.04789605210384173,"QQQ":(...TRUNCATED) | 2026-05-08T00:00:00 |
2026-05-11T00:00:00 | EQUITY_SECTORS | {"ann_return":0.078944,"ann_vol":0.152174,"sortino":0.6427,"max_drawdown":-0.277802,"cumulative_retu(...TRUNCATED) | [{"date":"2010-02-19T00:00:00","assets":["SPY","XLV","XLY","XLP","XLU","IWF","XBI","CASH"],"weights"(...TRUNCATED) | {"GDX":0.0,"GLD":null,"HYG":null,"IWF":0.0,"IWM":0.0,"LQD":null,"QQQ":0.0,"SLV":null,"SPY":0.0314866(...TRUNCATED) | 2026-05-08T00:00:00 |
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