fix train img paths

NLVR2.py

@@ -81,7 +81,7 @@ class NLVR2Dataset(datasets.GeneratorBasedBuilder):
         files_path = dl_manager.download_and_extract(urls)
 
         images_files = {
-            "train": os.path.join(_URL_IMG, f'{_SPLITS["train"]}_img.zip'),
+            "train": os.path.join(_URL_IMG, "images", f'{_SPLITS["train"]}_img.zip'),
             "validation": os.path.join(_URL_IMG, f'{_SPLITS["validation"]}_img.zip'),
             "test1": os.path.join(_URL_IMG, f'{_SPLITS["test1"]}_img.zip'),
         }
@@ -110,8 +110,13 @@ class NLVR2Dataset(datasets.GeneratorBasedBuilder):
             common_img_identifier = ex["identifier"].split("-")
             left_img_identifier = f"{split_name}-{common_img_identifier[1]}-{common_img_identifier[2]}-img0.png"
             right_img_identifier = f"{split_name}-{common_img_identifier[1]}-{common_img_identifier[2]}-img1.png"
-            left_image_path = str(os.path.join(images_path, left_img_identifier))
-            right_image_path = str(os.path.join(images_path, right_img_identifier))
+            if split_name == "train":
+                directory = ex["directory"]
+                left_image_path = str(os.path.join(images_path, directory, left_img_identifier))
+                right_image_path = str(os.path.join(images_path, directory, right_img_identifier))
+            else: 
+                left_image_path = str(os.path.join(images_path, left_img_identifier))
+                right_image_path = str(os.path.join(images_path, right_img_identifier))
             print(left_image_path)
             assert (os.path.exists(left_image_path)) 
             assert (os.path.exists(right_image_path))