| import logging | |
| from datasets import ( | |
| GeneratorBasedBuilder, | |
| DatasetInfo, | |
| SplitGenerator, | |
| Split, | |
| DownloadManager, | |
| Features, | |
| Value, | |
| Array2D, | |
| ) | |
| from adversarial_gym.chess_env import ChessEnv | |
| class ChessPGNDataset(GeneratorBasedBuilder): | |
| VERSION = "0.0.1" | |
| def _info(self): | |
| return DatasetInfo( | |
| description="Chess positions + moves + results, streamed from PGN shards", | |
| features=Features({ | |
| "state": Array2D((8,8), dtype="int8"), | |
| "action": Value("int16"), | |
| "result": Value("int8"), | |
| }) | |
| ) | |
| def _split_generators(self, dl_manager: DownloadManager): | |
| from pathlib import Path | |
| import os | |
| if self.config.data_dir: | |
| repo_root = Path(self.config.data_dir) | |
| train_files = [repo_root / 'train' / f for f in os.listdir(repo_root / 'train')] | |
| test_files = [repo_root / 'test' / f for f in os.listdir(repo_root / 'test')] | |
| elif self.config.data_files: | |
| train_files = self.config.data_files["train"] | |
| test_files = self.config.data_files["test"] | |
| train_paths = dl_manager.download(train_files) | |
| test_paths = dl_manager.download(test_files) | |
| return [ | |
| SplitGenerator( | |
| name=Split.TRAIN, | |
| gen_kwargs={"shards": train_paths}, | |
| ), | |
| SplitGenerator( | |
| name=Split.TEST, | |
| gen_kwargs={"shards": test_paths}, | |
| ), | |
| ] | |
| def _generate_examples(self, shards): | |
| import chess.pgn | |
| uid = 0 | |
| for path in shards: | |
| with open(path, "r") as f: | |
| while (game := chess.pgn.read_game(f)) is not None: | |
| board = game.board() | |
| base = {"1-0":1,"0-1":-1}.get(game.headers["Result"], 0) | |
| for move in game.mainline_moves(): | |
| state = ChessEnv.get_piece_configuration(board) | |
| state = state if board.turn else -state | |
| action = ChessEnv.move_to_action(move) | |
| result = base * (-1 if board.turn == 0 else 1) | |
| yield uid, { | |
| "state": state.astype("int8"), | |
| "action": int(action), | |
| "result": int(result), | |
| } | |
| uid += 1 | |
| board.push(move) | |