add train/test files and builder code

ChessBot-Dataset.py

@@ -0,0 +1,53 @@
+import glob, os, chess.pgn
+from datasets import (
+    GeneratorBasedBuilder, DatasetInfo, SplitGenerator, Split,
+    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):
+        # data_dir is the root of your dataset repo
+        data_dir = self.config.data_dir
+        return [
+          SplitGenerator(
+            name=Split.TRAIN,
+            gen_kwargs={"shards": glob.glob(os.path.join(data_dir,"train","*.pgn"))}
+          ),
+          SplitGenerator(
+            name=Split.TEST,
+            gen_kwargs={"shards": glob.glob(os.path.join(data_dir,"test","*.pgn"))}
+          ),
+        ]
+
+    def _generate_examples(self, shards):
+        uid = 0
+        for path in sorted(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)

ChessBot-dataset-0.1.0.zip

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:3ab9e11d0af2b6e6fe2831837dbb96446d882ab544ae96d7e184f130f078b4f9
-size 2547657186