Example showing how to trap a signal with a Python asyncio coroutine function and exit cleanly without logging an error.

example_asyncio_signal_shutdown.py

import asyncio
import functools
import signal
import sys
import time


async def worker(shutdown_event):
    try:
        while True:
            await asyncio.sleep(1)
    except asyncio.CancelledError:  # catch it so it does not get logged by the asyncio library
        pass

    print('Shutting down...')


async def do_shutdown(task):
    # Here we could await join() or whatever

    # Then also cancel one or more tasks
    task.cancel()


async def listener():
    shutdown_event = asyncio.Event()

    task = asyncio.create_task(worker(shutdown_event))
    asyncio.get_running_loop().add_signal_handler(
        signal.SIGINT,
        functools.partial(asyncio.create_task, do_shutdown(task))
    )

    await task

    # Not really necessary in this example since asyncio.run() will return
    #   once listener() returns and then the script ends.
    sys.exit(0)

asyncio.run(listener())