t.py

import rose
from tulip import events
from tulip import tasks

#events.set_event_loop_policy(rose.EventLoopPolicy())
reactor = events.get_event_loop()


def _foo():
    x = 0
    while x < 10:
        print("ping")
        yield from (tasks.sleep(0.1))
        x += 1
        if x == 5:
            reactor.stop()


reactor.run_until_complete(tasks.Task(_foo()))
print("stop")