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import datasets |
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import zstandard as zstd |
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import io |
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class LichessConfig(datasets.BuilderConfig): |
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def __init__(self, features, **kwargs): |
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super(LichessConfig, self).__init__(**kwargs) |
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self.features = features |
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class Lichess(datasets.GeneratorBasedBuilder): |
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BUILDER_CONFIG_CLASS = LichessConfig |
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BUILDER_CONFIGS = [LichessConfig(name="pgn", |
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features=["WhiteElo", |
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"BlackElo", |
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"pgn"]), |
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LichessConfig(name="fen", |
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features=["WhiteElo", |
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"BlackElo", |
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"fens", |
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"moves", |
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"scores"]),] |
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def _info(self): |
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features_dict = {feature: datasets.Value("uint16") for feature in self.config.features} |
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if self.config.name == "pgn": |
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features_dict["pgn"] = datasets.Value("string") |
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if self.config.name == "fen": |
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features_dict["fens"] = datasets.Value("string") |
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features_dict["moves"] = datasets.Value("string") |
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features_dict["scores"] = datasets.Value("string") |
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info = datasets.DatasetInfo(datasets.Features(features_dict)) |
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return info |
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def _get_filepaths(self): |
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months = ["04"] |
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shards = ["0", "1", "2", "3"] |
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filepaths = [ self.config.name + "/2023/" + m for m in months] |
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if self.config.name == "pgn": |
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paths = [] |
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for shard in shards: |
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paths.extend([filepath + "/" + shard + ".zst" for filepath in filepaths]) |
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if self.config.name == "fen": |
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paths = [] |
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for shard in shards: |
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paths.extend([filepath + "/" + shard + "_fen.zst" for filepath in filepaths]) |
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return paths |
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def _split_generators(self, dl_manager: datasets.DownloadManager): |
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filepaths = self._get_filepaths() |
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downloaded_files = dl_manager.download(filepaths) |
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generator = datasets.SplitGenerator(name=datasets.Split.TRAIN, |
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gen_kwargs={'filepaths': downloaded_files}) |
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return [generator] |
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def _generate_examples(self, filepaths): |
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dctx = zstd.ZstdDecompressor() |
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for filepath in filepaths: |
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n = 0 |
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with open(filepath, "rb") as file: |
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with dctx.stream_reader(file) as sr: |
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pgn = io.TextIOWrapper(sr) |
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if self.config.name == "pgn": |
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while True: |
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white_elo, black_elo = pgn.readline().split(" ") |
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game_pgn = pgn.readline() |
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next_line = pgn.readline() |
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if game_pgn: |
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_id = n |
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n += 1 |
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yield _id, {"WhiteElo": int(white_elo), |
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"BlackElo": int(black_elo), |
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"pgn": game_pgn} |
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else: |
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break |
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elif self.config.name == "fen": |
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while True: |
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white_elo, black_elo = pgn.readline().split(" ") |
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game = pgn.readline() |
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fens, moves, scores = game.split(";") |
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if game: |
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_id = n |
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n += 1 |
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yield _id, {"WhiteElo": white_elo, |
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"BlackElo": black_elo, |
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"fens": fens, |
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"moves": moves, |
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"scores": scores} |
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else: |
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break |
