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The dataset generation failed
Error code: DatasetGenerationError
Exception: TypeError
Message: Couldn't cast array of type
struct<loginplayeventcourseid: string, wins: string, losses: string>
to
{'wins': Value('string'), 'losses': Value('string')}
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 2118, in cast_array_to_feature
casted_array_values = _c(array.values, feature.feature)
File "/usr/local/lib/python3.14/site-packages/datasets/table.py", line 1863, in wrapper
return func(array, *args, **kwargs)
File "/usr/local/lib/python3.14/site-packages/datasets/table.py", line 2068, in cast_array_to_feature
_c(array.field(name) if name in array_fields else null_array, subfeature)
~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/local/lib/python3.14/site-packages/datasets/table.py", line 1863, in wrapper
return func(array, *args, **kwargs)
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<loginplayeventcourseid: string, wins: string, losses: string>
to
{'wins': Value('string'), 'losses': Value('string')}
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 1879, 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.
description string | starttime string | site_name string | player_count dict | decklists list |
|---|---|---|---|---|
Pauper Challenge 16 | 2026-09-01 10:00:00.0 | pauper-challenge-16-2026-09-0112853221 | {
"tournamentid": "12853221",
"players": "31",
"queued_players": "31"
} | [
{
"player": "ejk",
"colors": [
"R"
],
"archetype": "Mono Red Madness",
"wins": {
"wins": "7",
"losses": "1"
},
"final_rank": 1,
"main_deck": [
{
"qty": "4",
"card_attributes": {
"card_name": "Lightning Bolt",
"card_type": "I... |
Pauper Challenge 16 | 2026-10-03 09:00:00.0 | pauper-challenge-16-2026-09-0612855476 | {
"tournamentid": "12855476",
"players": "28",
"queued_players": "28"
} | [
{
"player": "Luminati",
"colors": [
"U"
],
"archetype": "Mono Blue Terror",
"wins": {
"wins": "7",
"losses": "1"
},
"final_rank": 1,
"main_deck": [
{
"qty": "4",
"card_attributes": {
"card_name": "Tolarian Terror",
"card_typ... |
Pauper Challenge 16 | 2026-09-08 10:00:00.0 | pauper-challenge-16-2026-09-0812853785 | null | [{"player":"yahakara","colors":["R"],"archetype":"Mono Red Madness","wins":{"wins":"7","losses":"2"}(...TRUNCATED) |
Pauper Challenge 16 | 2026-09-15 10:00:00.0 | pauper-challenge-16-2026-09-1512854110 | {
"tournamentid": "12854110",
"players": "27",
"queued_players": "27"
} | [{"player":"boytriton","colors":["U"],"archetype":"Mono Blue Terror","wins":{"wins":"7","losses":"1"(...TRUNCATED) |
Pauper Challenge 16 | 2026-09-19 09:00:00.0 | pauper-challenge-16-2026-09-1912854501 | {
"tournamentid": "12854501",
"players": "28",
"queued_players": "28"
} | [{"player":"Luminati","colors":["U"],"archetype":"Mono Blue Terror","wins":{"wins":"8","losses":"0"}(...TRUNCATED) |
Pauper Challenge 16 | 2026-09-22 10:00:00.0 | pauper-challenge-16-2026-09-2212854534 | {
"tournamentid": "12854534",
"players": "28",
"queued_players": "28"
} | [{"player":"Denisevich","colors":["B","R","W"],"archetype":"Mardu Wildfire","wins":{"wins":"7","loss(...TRUNCATED) |
Pauper Challenge 16 | 2026-09-26 09:00:00.0 | pauper-challenge-16-2026-09-2612854918 | {
"tournamentid": "12854918",
"players": "43",
"queued_players": "43"
} | [{"player":"RUCetFort","colors":["W"],"archetype":"White Weenie","wins":{"wins":"7","losses":"2"},"f(...TRUNCATED) |
Pauper Challenge 16 | 2026-09-29 10:00:00.0 | pauper-challenge-16-2026-09-2912854951 | {
"tournamentid": "12854951",
"players": "24",
"queued_players": "24"
} | [{"player":"serajh","colors":["B","U","W"],"archetype":"Esper Affinity","wins":{"wins":"6","losses":(...TRUNCATED) |
Pauper Challenge 16 | 2026-10-03 09:00:00.0 | pauper-challenge-16-2026-10-0312855476 | {
"tournamentid": "12855476",
"players": "28",
"queued_players": "28"
} | [{"player":"Luminati","colors":["U"],"archetype":"Mono Blue Terror","wins":{"wins":"7","losses":"1"}(...TRUNCATED) |
Pauper Challenge 16 | 2026-10-06 10:00:00.0 | pauper-challenge-16-2026-10-0612855509 | {
"tournamentid": "12855509",
"players": "33",
"queued_players": "33"
} | [{"player":"Kirblinxy","colors":["G","U"],"archetype":"Simic Fog","wins":{"wins":"7","losses":"2"},"(...TRUNCATED) |
End of preview.
Merchant Scroll — Pauper Tournament Decklists
Every Magic: The Gathering Pauper decklist collected by Merchant Scroll: MTGO Leagues, Challenges, Showcases and RC qualifiers from mtgo.com, plus paper events from Pauperwave. The crawler updates it several times an hour.
Files
| Path | Contents |
|---|---|
raw/<site_name>.json |
One tournament per file, named after its mtgo.com slug (pauperwave-<slug> for paper events) |
card-art.json |
Card name → first-printing Scryfall image URLs (_unresolved lists names Scryfall does not know) |
info.json |
Time of the last crawl that changed the data |
Tournament record
{
"description": "Pauper Challenge 32 Special",
"starttime": "2025-11-12 23:30:00.0",
"site_name": "pauper-challenge-32-special-2025-11-1212824383",
"player_count": {"tournamentid": "12824383", "players": "32", "queued_players": "32"},
"decklists": [
{
"player": "Paul16",
"archetype": "Jund Gardens",
"colors": ["B"],
"wins": {"wins": "7", "losses": "1"},
"final_rank": 1,
"main_deck": [{"qty": "1", "card_attributes": {"card_name": "Mountain", "card_type": "LAND"}}],
"sideboard_deck": [{"qty": "3", "card_attributes": {"card_name": "Red Elemental Blast", "card_type": "INSTNT"}}]
}
]
}
qty,winsandplayer_countvalues are strings, as mtgo.com publishes them.archetypeis assigned by Merchant Scroll's classifier, not by the player.winsandfinal_rankappear only for events with published results; Leagues publish 5-0 lists without standings.sourceandformatappear on paper (Pauperwave) events only.
Loading
from huggingface_hub import snapshot_download
path = snapshot_download("vedalken/merchantscroll", repo_type="dataset", allow_patterns="raw/*")
Decklists are published by Wizards of the Coast on mtgo.com and by the Pauperwave community; Merchant Scroll only collects and labels them.
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