Upload processing_song2midi.py

processing_song2midi.py

@@ -62,7 +62,13 @@ class Song2MIDIProcessor(ProcessorMixin):
             if input_data is not None and attribute is not None:
                 if attribute_name == "midi_tokenizer":
                     # Change the None to empty string to avoid errors in tokenizers when trying to tokenize None.
-                    input_data = input_data if input_data is not None else ""
+                    if isinstance(input_data, (list, tuple)):
+                        input_data = [
+                            item if item is not None else "" for item in input_data
+                        ]
+                    else:
+                        input_data = input_data if input_data is not None else ""
+
                 attribute_output = attribute(input_data, **kwargs[input_kwargs])
                 outputs[attribute_name] = attribute_output