Make dataset streamable (#4)

- Make dataset streamable (02dd9ab032273d1007d1de342838b72d3b4e6a61)

brill_iconclass.py

@@ -73,5 +73,4 @@ class BrillIconclass(datasets.GeneratorBasedBuilder):
             data = json.load(f)
             for row, item in enumerate(data.items()):
                 filepath, labels = item
-                image = Image.open(os.path.join(data_dir, filepath))
-                yield row, {"image": image, "label": labels}
+                yield row, {"image": os.path.join(data_dir, filepath), "label": labels}