fix: Fixed preview

imagenette.py

@@ -112,25 +112,30 @@ class OpenFire(datasets.GeneratorBasedBuilder):
     def _split_generators(self, dl_manager):
         archive_path = dl_manager.download(self.config.data_url)
         local_extracted_archive = dl_manager.extract(archive_path) if not dl_manager.is_streaming else None
-        archive_iters = {l: dl_manager.iter_archive(v) for l, v in archive_path.items()}
+        archive_iter = dl_manager.iter_archive(archive_path)
         return [
             datasets.SplitGenerator(
                 name=datasets.Split.TRAIN,
                 gen_kwargs={
-                    "archive_iter": archive_iters["train"],
+                    "archive_iter": archive_iter,
+                    "split_folder": "train",
                 },
             ),
             datasets.SplitGenerator(
                 name=datasets.Split.VALIDATION,
                 gen_kwargs={
-                    "archive_iter": archive_iters["val"],
+                    "archive_iter": archive_iter,
+                    "split_folder": "val",
                 },
             ),
         ]
 
-    def _generate_examples(self, archive_iter):
+    def _generate_examples(self, archive_iter, split_folder):
         idx = 0
         for path, f in archive_iter:
-            class_idx = _LABEL_MAP.index(path.split("/")[-2])
+            path_split = path.split("/")
+            if path_split[-3] != split_folder:
+                continue
+            class_idx = _LABEL_MAP.index(path_split[-2])
             yield idx, {"image": path, "label": class_idx}
             idx += 1