Update openwebtext_split.py

openwebtext_split.py

@@ -57,7 +57,7 @@ def custom_iter_archive(path_or_buf, _filter=lambda x: True):
             if not file_path.endswith('xz'):
                 continue
             file_obj = stream.extractfile(tarinfo)
-            decompressed = tarfile.open(fileobj=file_obj, mode='r:xz')
+            decompressed = tarfile.open(fileobj=file_obj, mode='r|xz')
             for j, xzinfo in enumerate(decompressed):
                 if not xzinfo.name.endswith('txt'):
                     continue