from __future__ import print_function
import sys
from gevent import core
from gevent import signal_handler as signal
loop = core.loop(default=False)


signal = signal(2, sys.stderr.write, 'INTERRUPT!')

print('must exit immediately...')
loop.run()  # must exit immediately
print('...and once more...')
loop.run()  # repeating does not fail
print('..done')

print('must exit after 0.5 seconds.')
timer = loop.timer(0.5)
timer.start(lambda: None)
loop.run()
timer.close()
loop.destroy()
del loop