Update app.py

app.py

@@ -28,7 +28,7 @@ UPLOAD_DIR = Path("uploads")
 UPLOAD_DIR.mkdir(exist_ok=True)
 
 @app.post("/upload")
-async def upload_file(file: UploadFile = File(...), type: str = Form(...), task: BackgroundTasks):
+async def upload_file(file: UploadFile = File(...), type: str = Form(...), task: BackgroundTasks = None):
     # print(file)
     # file_path = Path(file.filename)
     # with file_path.open("wb") as buffer: