Update the COCO.py type mismatches between the HuggingFace Datasets API and this code

COCO.py

@@ -126,12 +126,21 @@ class COCO(datasets.GeneratorBasedBuilder):
         )
 
     def _split_generators(self, dl_manager):
-        annotation_file = os.path.join(dl_manager.download_and_extract(_KARPATHY_FILES_URL), "dataset_coco.json")
-        image_folders = {k: Path(v) for k, v in dl_manager.download_and_extract(_IMAGES_URLS).items()}
+        annotation_dir = dl_manager.download_and_extract(_KARPATHY_FILES_URL)
+        # If annotation_dir is a list, get the first element
+        if isinstance(annotation_dir, list):
+            annotation_dir = annotation_dir[0]
+        annotation_file = os.path.join(annotation_dir, "dataset_coco.json")
+        image_folders = dl_manager.download_and_extract(_IMAGES_URLS)
+        # If image_folders is a list, convert to dict with split keys
+        if isinstance(image_folders, list):
+            image_folders = {k: Path(v) for k, v in zip(_IMAGES_URLS.keys(), image_folders)}
+        else:
+            image_folders = {k: Path(v) for k, v in image_folders.items()}
 
         return [
             datasets.SplitGenerator(
-                name=datasets.Split.TRAIN,
+                name="train",
                 gen_kwargs={
                     "annotation_file": annotation_file,
                     "image_folders": image_folders,
@@ -139,7 +148,7 @@ class COCO(datasets.GeneratorBasedBuilder):
                 },
             ),
             datasets.SplitGenerator(
-                name=datasets.Split.VALIDATION,
+                name="validation",
                 gen_kwargs={
                     "annotation_file": annotation_file,
                     "image_folders": image_folders,
@@ -147,7 +156,7 @@ class COCO(datasets.GeneratorBasedBuilder):
                 },
             ),
             datasets.SplitGenerator(
-                name=datasets.Split.TEST,
+                name="test",
                 gen_kwargs={
                     "annotation_file": annotation_file,
                     "image_folders": image_folders,
@@ -239,3 +248,4 @@ class COCO(datasets.GeneratorBasedBuilder):
                         "cocoid": image_metadata["cocoid"],
                     }
                     counter += 1
+