Spawn a thread and make the greenlet wait for it to exit.

gevent_thread_wait.py

from __future__ import print_function

import time

import gevent
from gevent import hub, _threading


def ticker():
    while True:
        print('tick')
        gevent.sleep(1)


def listen():
    def worker():
        time.sleep(5)
        watcher.send()
    watcher = hub.get_hub().loop.async()
    _threading.start_new_thread(worker, ())
    hub.get_hub().wait(watcher)


gevent.spawn(ticker)
print('listen starting')
listen()
print('listen stopped')