Starting a tor process and not making it stop

gistfile1.txt

import txtorcon

from twisted.internet import defer
from ooni.utils import log
from ooni import nettest

class ExampleTorProcess(nettest.NetTestCase):
    name = "Example Tor Process"

    def tearDown(self):
        pass

    def test_tor_process(self):
        def state_complete(state):
            for c in state.circuits.values():
                print "These are my circuits"
                print c
            # Do here all your other stuff
            # If you don't want the test run to finish keep returning 'em
            # deferreds and the test will go on.

        def setup_complete(proto):
            state = txtorcon.TorState(proto.tor_protocol)
            state.post_bootstrap.addCallback(state_complete)
            state.post_bootstrap.addErrback(setup_failed)
            return state.post_bootstrap

        def setup_failed(arg):
            print "SETUP FAILED",arg

        config = txtorcon.TorConfig()
        config.OrPort = 1234
        config.SocksPort = 9999

        def updates(prog, tag, summary):
            print "%d%%: %s" % (prog, summary)

        from twisted.internet import reactor
        d = txtorcon.launch_tor(config, reactor, progress_updates=updates)

        d.addCallback(setup_complete)
        d.addErrback(setup_failed)
        return d