import asyncio

shutting_down = False

async def my_service():
    async def _read():
        pass

    while not shutting_down:
        try:
            m = await asyncio.wait_for(_read(), 0)
        except:
            pass

if __name__ == "__main__":
    loop = asyncio.get_event_loop()
    loop.create_task(my_service())
    loop.run_forever()