import asyncio
import time


@asyncio.coroutine
def sleep_in_executor(loop):
    print("Going to sleep")
    yield from loop.run_in_executor(None, time.sleep, 1000)
    print("Wake up (you should not see this)")


print("Start")
loop = asyncio.get_event_loop()
try:
    loop.run_until_complete(sleep_in_executor(loop))
finally:
    print("Closing loop")
    loop.close()
print("End (you should not see this)")