#!/usr/bin/python3
import sys
import gevent
from gevent import socket
urls = ['www.fedoraproject.org', 'www.redhat.com']
jobs = [gevent.spawn(socket.gethostbyname, url) for url in urls]
gevent.joinall(jobs, timeout=2)

results = [job.value for job in jobs]
print(results)
if not all(results):
    sys.exit(1)