Debounce calls to this function until interval_s seconds have passed.

def debounce(interval_s, keyed_by=None):
    """Debounce calls to this function until interval_s seconds have passed."""
    def wrapper(func):
        timers = {}
        lock = threading.Lock()

        @functools.wraps(func)
        def debounced(*args, **kwargs):
            call_args = inspect.getcallargs(func, *args, **kwargs)
            key = call_args[keyed_by] if keyed_by else None

            def run():
                with lock:
                    del timers[key]
                return func(*args, **kwargs)

            with lock:
                old_timer = timers.get(key)
                if old_timer:
                    old_timer.cancel()

                timer = threading.Timer(interval_s, run)
                timers[key] = timer
                timer.start()
        return debounced
    return wrapper