Change data preview to safetensor mode

Pong-v4-expert-MCTS.py

@@ -1,7 +1,8 @@
 import pickle
-
+from safetensors import saveopen
 import datasets
 
+
 _DESCRIPTION = """\
 Data sampled from an efficient-zero policy in the pong environment. The MCTS hidden state is included in the dataset.
 """
@@ -14,7 +15,7 @@ _LICENSE = "Apache-2.0"
 # This can be an arbitrary nested dict/list of URLs (see below in `_split_generators` method)
 _BASE_URL = "https://huggingface.co/datasets/OpenDILabCommunity/Pong-v4-expert-MCTS/resolve/main"
 _URLS = {
-    "Pong-v4-expert-MCTS": f"{_BASE_URL}/pong-v4-expert.pkl",
+    "Pong-v4-expert-MCTS": f"{_BASE_URL}/pong-v4-expert-new.safetensors",
 }
 
 
@@ -83,8 +84,10 @@ class DecisionTransformerGymDataset(datasets.GeneratorBasedBuilder):
 
     # method parameters are unpacked from `gen_kwargs` as given in `_split_generators`
     def _generate_examples(self, filepath, split):
-        with open(filepath, "rb") as f:
-            data = pickle.load(f)
+        data = {}
+        with safe_open(filepath, framework="pt", device="cpu") as f:
+            for key in f.keys():
+                data[key] = f.get_tensor(key)
         
         for idx in range(len(data['obs'])):
             yield idx, {