Add minimal loading script with 'val' split

dataset.py

@@ -0,0 +1,43 @@
+# dataset.py
+import os, glob, datasets
+from datasets import SplitGenerator
+
+
+class ITTO(datasets.GeneratorBasedBuilder):
+    VERSION = datasets.Version("1.0.0")
+
+    def _info(self):
+        return datasets.DatasetInfo(
+            features=datasets.Features(
+                {
+                    "image": datasets.Image(),
+                    "label": datasets.Value("string"),
+                }
+            )
+        )
+
+    def _split_generators(self, dl_manager):
+        # Name the split exactly how you want it shown:
+        return [
+            SplitGenerator(
+                name="val", gen_kwargs={"data_dir": self.config.data_dir or ""}
+            )
+        ]
+        # Or: name=datasets.Split.VALIDATION
+
+    def _generate_examples(self, data_dir):
+        # Example: scan local folders when a user supplies data_dir
+        roots = ["ego4d/frames", "lvos/frames", "mose/frames"]
+        eid = 0
+        for root in roots:
+            root_path = os.path.join(data_dir, root)
+            if not os.path.isdir(root_path):
+                continue
+            for cls in sorted(os.listdir(root_path)):
+                cls_dir = os.path.join(root_path, cls)
+                if not os.path.isdir(cls_dir):
+                    continue
+                for fp in glob.glob(os.path.join(cls_dir, "*")):
+                    if os.path.isfile(fp):
+                        yield eid, {"image": fp, "label": cls}
+                        eid += 1