How to use the ykdl.compact.thread.start_new_thread function in ykdl

if first_size:
        RangeFetch.first_size = first_size
    if max_size:
        RangeFetch.max_size = max_size
    if threads:
        RangeFetch.threads = threads
    if down_rate:
        RangeFetch.down_rate_min = int(down_rate * 2)
        RangeFetch.down_rate_max = RangeFetch.down_rate_min + min(max(down_rate, 1024 * 100), 1024 * 200)
    if proxy:
        RangeFetch.proxy = proxy
    if headers:
        RangeFetch.headers.update(headers)
    new_server = LocalTCPServer((bind, port), RangeFetchHandler)
    RangeFetch.bufsize = RangeFetchHandler.bufsize
    thread.start_new_thread(new_server.serve_forever, ())
    return new_server

def spawn_later(seconds, target, *args, **kwargs):
    def wrap(*args, **kwargs):
        sleep(seconds)
        target(*args, **kwargs)
    thread.start_new_thread(wrap, args, kwargs)