How to use the mitogen.main function in mitogen

@mitogen.main()
def main(router):
    ansible_mitogen.affinity.policy.assign_muxprocess()

    bigfile = tempfile.NamedTemporaryFile()
    fill_with_random(bigfile, 1048576*512)

    file_service = mitogen.service.FileService(router)
    pool = mitogen.service.Pool(router, ())
    file_service.register(bigfile.name)
    pool.add(file_service)
    try:
        context = router.local()
        run_test(router, bigfile, 'local()', context)
        context.shutdown(wait=True)

        context = router.sudo()

@mitogen.main()
def main(router):
    f = router.fork()
    f.call(do_nothing)
    t0 = mitogen.core.now()
    for x in xrange(20000):
        f.call(do_nothing)
    print('++', int(1e6 * ((mitogen.core.now() - t0) / (1.0+x))), 'usec')

@mitogen.main()
def main(router):
    f = router.fork()
    t0 = mitogen.core.now()
    for x in range(1000):
        f.call_service(service_name=MyService, method_name='ping')
    print('++', int(1e6 * ((mitogen.core.now() - t0) / (1.0+x))), 'usec')

@mitogen.main()
def main(router):
    t0 = mitogen.core.now()
    for x in range(100):
        t = mitogen.core.now()
        f = router.local()# debug=True)
        tt = mitogen.core.now()
        print(x, 1000 * (tt - t))
    print('%.03f ms' % (1000 * (mitogen.core.now() - t0) / (1.0 + x)))

@mitogen.main()
def main(router):
    t0 = mitogen.core.now()
    for x in xrange(200):
        t = mitogen.core.now()
        ctx = router.fork()
        ctx.shutdown(wait=True)
    print '++', 1000 * ((mitogen.core.now() - t0) / (1.0+x))

@mitogen.main(log_level='DEBUG')
def main(router):
    if len(sys.argv) != 3:
        print('usage: %s  ' % sys.argv[0])
        sys.exit(1)

    blerp = fuse.FUSE(
        operations=Operations(sys.argv[1]),
        mountpoint=sys.argv[2],
        foreground=True,
        volname='%s (Mitogen)' % (sys.argv[1],),
    )

@mitogen.main()
def main(router):
    listener = mitogen.unix.Listener(router, path='/tmp/mitosock')
    service = PingService(router)
    service.run()

@mitogen.main()
def main(router):
    # Start 5 subprocesses and give them made up names.
    contexts = {
        'host%d' % (i,): router.local()
        for i in range(5)
    }

    # Used later to recover hostname. A future Mitogen will provide a better
    # way to get app data references back out of its IO primitives, for now you
    # need to do it manually.
    hostname_by_context_id = {
        context.context_id: hostname
        for hostname, context in contexts.items()
    }

    # I am a select that holds the receivers that will receive the function