Update main.py

main.py

@@ -3,6 +3,7 @@ from base64 import b64encode
 from speech_recognition import AudioFile, Recognizer
 import numpy as np
 from scipy.spatial import distance as dist
+from typing import Union
 
 from sahi.utils.cv import read_image_as_pil
 from fastapi import FastAPI, File, UploadFile