only dl data_files

commavq.py

@@ -1,6 +1,7 @@
 import datasets
 import os
 import numpy as np
+import itertools
 
 SHARD_SIZE = 2500
 NUM_SHARDS = 40
@@ -25,7 +26,7 @@ class CommaVQ(datasets.GeneratorBasedBuilder):
   def _split_generators(self, dl_manager):
     """Returns SplitGenerators."""
     dl_manager.download_config.ignore_url_params = True
-    to_dl = self.config.data_files.items() if self.config.data_files is not None else _DATA_FILES
+    to_dl = list(itertools.chain(*[x[1] for x in self.config.data_files.items()])) if self.config.data_files is not None else _DATA_FILES
     downloaded_files = dl_manager.download(to_dl)
     local_extracted_archive = dl_manager.extract(downloaded_files) if not dl_manager.is_streaming else [None]*len(downloaded_files)
     return [