adapt for states

frozen_lake.py

@@ -58,7 +58,7 @@ class ImageSet(GeneratorBasedBuilder):
         with open(infos, encoding="utf-8") as data:
             for idx, line in enumerate(data):
                 record = json.loads(line)
-                index = record["obs"].split(".")[0]
+                index = record["states"].split(".")[0]
                 yield idx, {
                     "obs": images_dict[index],
                     "actions": record["actions"],