gistfile1.py

from threading import Thread

from twisted.internet import reactor
from twisted.internet.threads import blockingCallFromThread
from twisted.names import client

running = False

def query():
    global running
    if not running:
        running = True
        Thread(target=reactor.run, args=(False,)).start()
    return blockingCallFromThread(reactor, client.lookupAddress, 'google.com')