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Cannot load the dataset split (in streaming mode) to extract the first rows.

Error code:   StreamingRowsError
Exception:    TypeError
Message:      Couldn't cast array of type
struct<alakazam: struct<>, articuno: struct<>, beedrill: struct<>, blastoise: struct<>, chansey: struct<>, charizard: struct<>, cloyster: struct<>, dragonite: struct<>, electrode: struct<>, exeggutor: struct<>, gengar: struct<>, golem: struct<>, jolteon: struct<>, jynx: struct<>, machamp: struct<>, mew: struct<>, mewtwo: struct<>, raichu: struct<>, rhydon: struct<>, slowbro: struct<>, snorlax: struct<>, starmie: struct<>, tauros: struct<>, venusaur: struct<>, zapdos: struct<>>
to
{'chansey': {}, 'dragonite': {}, 'electrode': {}, 'exeggutor': {}, 'gengar': {}, 'mew': {}, 'mewtwo': {}, 'slowbro': {}, 'snorlax': {}, 'tauros': {}, 'aerodactyl': {}, 'alakazam': {}, 'articuno': {}, 'charizard': {}, 'cloyster': {}, 'dragonair': {}, 'golem': {}, 'jolteon': {}, 'jynx': {}, 'lapras': {}, 'magneton': {}, 'moltres': {}, 'parasect': {}, 'raichu': {}, 'rhydon': {}, 'scyther': {}, 'starmie': {}, 'tentacruel': {}, 'vaporeon': {}, 'venusaur': {}, 'zapdos': {}, 'blastoise': {}, 'gyarados': {}, 'hypno': {}, 'kangaskhan': {}, 'magmar': {}, 'nidoking': {}, 'persian': {}, 'pinsir': {}, 'poliwrath': {}, 'sandslash': {}, 'victreebel': {}, 'arcanine': {}, 'hitmonchan': {}, 'hitmonlee': {}, 'kingler': {}, 'porygon': {}}
Traceback:    Traceback (most recent call last):
                File "/src/services/worker/src/worker/utils.py", line 99, in get_rows_or_raise
                  return get_rows(
                         ^^^^^^^^^
                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 77, in get_rows
                  rows_plus_one = list(itertools.islice(ds, rows_max_number + 1))
                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
                File "/usr/local/lib/python3.12/site-packages/datasets/iterable_dataset.py", line 2543, in __iter__
                  for key, example in ex_iterable:
                                      ^^^^^^^^^^^
                File "/usr/local/lib/python3.12/site-packages/datasets/iterable_dataset.py", line 2060, in __iter__
                  for key, pa_table in self._iter_arrow():
                                       ^^^^^^^^^^^^^^^^^^
                File "/usr/local/lib/python3.12/site-packages/datasets/iterable_dataset.py", line 2092, in _iter_arrow
                  pa_table = cast_table_to_features(pa_table, self.features)
                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
                File "/usr/local/lib/python3.12/site-packages/datasets/table.py", line 2197, in cast_table_to_features
                  arrays = [cast_array_to_feature(table[name], feature) for name, feature in features.items()]
                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
                File "/usr/local/lib/python3.12/site-packages/datasets/table.py", line 1795, in wrapper
                  return pa.chunked_array([func(chunk, *args, **kwargs) for chunk in array.chunks])
                                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
                File "/usr/local/lib/python3.12/site-packages/datasets/table.py", line 2092, 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<alakazam: struct<>, articuno: struct<>, beedrill: struct<>, blastoise: struct<>, chansey: struct<>, charizard: struct<>, cloyster: struct<>, dragonite: struct<>, electrode: struct<>, exeggutor: struct<>, gengar: struct<>, golem: struct<>, jolteon: struct<>, jynx: struct<>, machamp: struct<>, mew: struct<>, mewtwo: struct<>, raichu: struct<>, rhydon: struct<>, slowbro: struct<>, snorlax: struct<>, starmie: struct<>, tauros: struct<>, venusaur: struct<>, zapdos: struct<>>
              to
              {'chansey': {}, 'dragonite': {}, 'electrode': {}, 'exeggutor': {}, 'gengar': {}, 'mew': {}, 'mewtwo': {}, 'slowbro': {}, 'snorlax': {}, 'tauros': {}, 'aerodactyl': {}, 'alakazam': {}, 'articuno': {}, 'charizard': {}, 'cloyster': {}, 'dragonair': {}, 'golem': {}, 'jolteon': {}, 'jynx': {}, 'lapras': {}, 'magneton': {}, 'moltres': {}, 'parasect': {}, 'raichu': {}, 'rhydon': {}, 'scyther': {}, 'starmie': {}, 'tentacruel': {}, 'vaporeon': {}, 'venusaur': {}, 'zapdos': {}, 'blastoise': {}, 'gyarados': {}, 'hypno': {}, 'kangaskhan': {}, 'magmar': {}, 'nidoking': {}, 'persian': {}, 'pinsir': {}, 'poliwrath': {}, 'sandslash': {}, 'victreebel': {}, 'arcanine': {}, 'hitmonchan': {}, 'hitmonlee': {}, 'kingler': {}, 'porygon': {}}

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Metamon Usage Stats

Version control for Metamon's Pokémon Showdown usage stat summaries.

Files contain the frequency of Pokémon attributes (items, moves, etc.) brought to real battles by Showdown players over a period of time. This information can be used to predict/generate teams.

Versions:

v0 : Original paper version, which was already quite out of date at the time of publication. Stats were taken across all available data up until that point (2015 - late 2023?)
v1: Breaking format change: stats are now split into individual months by battle format (similar to how they appear in the raw Smogon usage stats). This allows predictions to be made according to the usage stats at the time the battle was played.
v2: Adds June and July 2025
v3: Adds August 2025 - January 2026
v4: Changes format to split stats by player rating

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