Upload lichess_sf_hf.py

lichess_sf_hf.py

@@ -0,0 +1,106 @@
+#%%
+import datasets
+import zstandard as zstd
+import io
+
+#%%
+class LichessConfig(datasets.BuilderConfig):
+    def __init__(self, features, **kwargs):
+        super(LichessConfig, self).__init__(**kwargs)
+        self.features = features
+
+
+class Lichess(datasets.GeneratorBasedBuilder):
+    BUILDER_CONFIG_CLASS = LichessConfig
+    BUILDER_CONFIGS = [LichessConfig(name="pgn",
+                                     features=["WhiteElo",
+                                               "BlackElo",
+                                               "pgn"]),
+
+                       LichessConfig(name="fen",
+                                     features=["WhiteElo",
+                                               "BlackElo",
+                                               "fens",
+                                               "moves",
+                                               "scores"]),]
+
+    def _info(self):
+        features_dict = {feature: datasets.Value("uint16") for feature in self.config.features}
+
+        if self.config.name == "pgn":
+            features_dict["pgn"] = datasets.Value("string")
+        
+        
+        if self.config.name == "fen":
+            features_dict["fens"] = datasets.Value("string")
+            features_dict["moves"] = datasets.Value("string")
+            features_dict["scores"] = datasets.Value("string")
+
+        info = datasets.DatasetInfo(datasets.Features(features_dict))
+        return info
+
+    def _get_filepaths(self):
+        #months = ["01", "02", "03", "04", "05", "06",
+        #          "07", "08", "09", "10", "11", "12"]
+        months = ["04"]
+        shards = ["0", "1", "2", "3"]
+        filepaths = ["lichess/" + self.config.name + "/2023/" + m for m in months]
+
+        if self.config.name == "pgn":
+            paths = []
+            for shard in shards:
+                paths.extend([filepath + "/" + shard + ".zst" for filepath in filepaths])
+        
+        if self.config.name == "fen":
+            paths = []
+            for shard in shards:
+                paths.extend([filepath + "/" + shard + "_fen.zst" for filepath in filepaths])
+        
+        return paths
+
+    def _split_generators(self, dl_manager: datasets.DownloadManager):
+        filepaths = self._get_filepaths()
+        downloaded_files = dl_manager.download(filepaths)
+        generator = datasets.SplitGenerator(name=datasets.Split.TRAIN,
+                                            gen_kwargs={'filepaths': downloaded_files})
+        return [generator]
+
+    def _generate_examples(self, filepaths):
+        dctx = zstd.ZstdDecompressor()
+        for filepath in filepaths:
+            n = 0
+            with open(filepath, "rb") as file:
+                with dctx.stream_reader(file) as sr:
+                    pgn = io.TextIOWrapper(sr)
+
+                    if self.config.name == "pgn":
+                        while True:
+                            white_elo, black_elo = pgn.readline().split(" ")
+                            game_pgn = pgn.readline()
+                            next_line = pgn.readline()
+
+                            if game_pgn:
+                                _id = n
+                                n += 1
+                                yield _id, {"WhiteElo": int(white_elo),
+                                            "BlackElo": int(black_elo),
+                                            "pgn": game_pgn}
+                            else:
+                                break
+                    
+                    elif self.config.name == "fen":
+                        while True:
+                            white_elo, black_elo = pgn.readline().split(" ")
+                            game = pgn.readline()
+                            fens, moves, scores = game.split(";")
+
+                            if game:
+                                _id = n
+                                n += 1
+                                yield _id, {"WhiteElo": white_elo,
+                                            "BlackElo": black_elo,
+                                            "fens": fens,
+                                            "moves": moves,
+                                            "scores": scores}
+                            else:
+                                break