Update fixtures-captioning.py

fixtures-captioning.py

@@ -71,9 +71,8 @@ class FixturesCaptioning(datasets.GeneratorBasedBuilder):
         ]
     def _generate_examples(self, archive_path):
         """Generate examples."""
-        ordered_list = ["bbox_sample_image.jpeg", "bus.png", "chart.png", "skateboard.png"]
         for i, filename in enumerate(archive_path):
-            key = ordered_list[i]
+            key = str(i)
             example = {
                 "id": key,
                 "file": filename,