Update polygraph_xsum.py

polygraph_xsum.py

@@ -46,7 +46,7 @@ class PolygraphXsum(datasets.GeneratorBasedBuilder):
             split = src_url
             x, y = _prepare_dataset(dataset[split])
             result_dataset = datasets.Dataset.from_dict({"input": x, "output": y})
-            result_dataset.to_json(dst_path)
+            result_dataset.save_to_disk(dst_path)
         downloaded_files = dl_manager.download_custom({split: split for split in _CONFIG["splits"]}, download_custom_dataset)
 
         return [
@@ -68,7 +68,6 @@ class PolygraphXsum(datasets.GeneratorBasedBuilder):
         ]
 
     def _generate_examples(self, filepath):
-        with open(filepath, encoding="utf-8") as f:
-            dataset = datasets.Dataset.from_json(f.read())
-            for i in range(len(item)):
-                yield i, dataset[i]
+        dataset = datasets.Dataset.load_from_disk(filepath)
+        for i in range(len(item)):
+            yield i, dataset[i]