Update main.py

main.py

@@ -3,7 +3,7 @@ import time
 import tempfile
 import traceback
 from pathlib import Path
-from typing import List, Union, Optional, Dict, Any
+from typing import List, Union, Optional, Dict, Any, Literal
 
 from fastapi import FastAPI, File, UploadFile, HTTPException, status
 from pydantic import BaseModel, Field