How to use the streamz.compatibility.get_thread_identity function in streamz

def make_coro():
        coro = gen.maybe_future(func(*args, **kwargs))
        if timeout is None:
            return coro
        else:
            return gen.with_timeout(timedelta(seconds=timeout), coro)

    if not loop._running:
        try:
            return loop.run_sync(make_coro)
        except RuntimeError:  # loop already running
            pass

    e = threading.Event()
    main_tid = get_thread_identity()
    result = [None]
    error = [False]

    @gen.coroutine
    def f():
        try:
            if main_tid == get_thread_identity():
                raise RuntimeError("sync() called from thread of running loop")
            yield gen.moment
            thread_state.asynchronous = True
            result[0] = yield make_coro()
        except Exception as exc:
            logger.exception(exc)
            error[0] = sys.exc_info()
        finally:
            thread_state.asynchronous = False

def f():
        try:
            if main_tid == get_thread_identity():
                raise RuntimeError("sync() called from thread of running loop")
            yield gen.moment
            thread_state.asynchronous = True
            result[0] = yield make_coro()
        except Exception as exc:
            logger.exception(exc)
            error[0] = sys.exc_info()
        finally:
            thread_state.asynchronous = False
            e.set()