from twisted.spread import pb
from twisted.internet import reactor
factory = pb.PBClientFactory()
server = None
def gotServer(serv):
    global server
    server = serv
    reactor.stop()

connection = reactor.connectTCP('localhost', 8000, factory)
d = factory.getRootObject()
d.addCallback(gotServer)
#<Deferred at 0xac5680>
reactor.run()
print server
#<twisted.spread.pb.RemoteReference instance at 0xb1f488>