[Python] FastAPI python: How to run a thread in the background?

I'm making a server in python using FastAPI, and I want a function that is not related to my API, to run in background every 5 minutes (like checking stuff from an API and printing stuff depending on the response)

I've tried to make a thread that runs the function start_worker, but it doesn't print anything.

Does anyone know how to do so ?

def start_worker():
print('[main]: starting worker...')
my_worker = worker.Worker()
my_worker.working_loop() # this function prints "hello" every 5 seconds

if __name__ == '__main__':
print('[main]: starting...')
uvicorn.run(app, host="0.0.0.0", port=8000, reload=True)
_worker_thread = Thread(target=start_worker, daemon=False)
_worker_thread.start()

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