python_asyncio_stop_for_stackoverflow1.py

#!/usr/bin/env python3
# -*- coding: utf-8 -*-
import asyncio
import signal


def my_handler():
    print('Stopping')
    for task in asyncio.Task.all_tasks():
        task.cancel()


@asyncio.coroutine
def do_some(some_args):
    while True:
        print("Do staff with %s" % some_args)
        yield from asyncio.sleep(2)


@asyncio.coroutine
def do_some2(some_args):
    try:
        while True:
            print("Do staff with %s" % some_args)
            yield from asyncio.sleep(2)
    except asyncio.CancelledError:
        print('Cancelling... %s' % some_args)
        yield from asyncio.sleep(2)
        print('Cancelled %s' % some_args)
        raise


def main():
    loop = asyncio.get_event_loop()

    loop.add_signal_handler(signal.SIGINT, my_handler)

    try:
        loop.run_until_complete(asyncio.wait([do_some(1), do_some(2), do_some2(1), do_some2(2)]))
    except asyncio.CancelledError:
        print('Tasks canceled 1')
        loop.run_until_complete(asyncio.wait(asyncio.Task.all_tasks()))
    finally:
        loop.close()

if __name__ == '__main__':
    main()