fix memory issue (#1)

- fix memory issue (fe98e145316cf6e8f6a112ffdeb5cb9a6680fa7a)


Co-authored-by: Quentin Lhoest <[email protected]>

dataset_script.py

@@ -250,7 +250,7 @@ class CommonVoice(datasets.GeneratorBasedBuilder):
                 if not metadata:
                     break
                 if path in metadata:
-                    result = metadata[path]
+                    result = dict(metadata[path])
                     # set the audio feature and the path to the extracted file
                     path = os.path.join(local_extracted_archive, path) if local_extracted_archive else path
                     result["audio"] = {"path": path, "bytes": f.read()}