human
I wrote the below code

    def newth(ii):
        return threading.Thread(target=_worker_thread_fn, args=(('hostname', ii), n_jobs, timeout, dbname))
    def deco(f):
        def wrapper(*args, **kwargs):
            threads = list(map(newth, list(range(n_threads))))
            [th.start() for th in threads]
            try:
                return f(*args, **kwargs)
            finally:
                [th.join() for th in threads]
        wrapper.__name__ = f.__name__
        return wrapper
    return deco

What's a good function header?
 ... Here's a good function header?
assistant
#Here's a good function header.

def with_worker_threads(n_threads, dbname='foo', n_jobs=sys.maxsize, timeout=10.0):