tested on V100

Signed-off-by: Nithin Rao Koluguri <nithinraok>

nemo/collections/asr/parts/utils/transcribe_utils.py

@@ -18,7 +18,7 @@
 from dataclasses import dataclass
 from pathlib import Path
 from tempfile import NamedTemporaryFile
-from typing import List, Tuple, Union
+from typing import List, Tuple, Union, Optional
 
 import torch
 from omegaconf import DictConfig