sig.py

import asyncio
import functools
import os
import signal


def ask_signal(signame, exit=False):
    print("got signal %s" % signame)
    if exit:
        loop.stop()


loop = asyncio.get_event_loop()
for signame in ('SIGINT', 'SIGTERM'):
    loop.add_signal_handler(getattr(signal, signame),
                            functools.partial(ask_signal, signame, True))
for signame in ('SIGHUP', 'SIGUSR1'):
    loop.add_signal_handler(getattr(signal, signame),
                            functools.partial(ask_signal, signame))

print("Event loop running forever, press Ctrl+C to interrupt.")
print("pid %s: send SIGINT or SIGTERM to exit." % os.getpid())
try:
    loop.run_forever()
finally:
    loop.close()