util.py 文件源码

def smart_delay(delay: float, last_cmd: float, remain: int=0) -> float:
    """
    A "smart" delay mechanism which tries to reduce the
    delay as much as possible based on the time the last
    delay happened.

    :param delay: delay in seconds
    :param last_cmd: time of last command
    :param remain: counter, skip delay unless it's zero

    :return: timestamp to feed to next invocation
    """
    now = time.monotonic()

    if remain == 0 and last_cmd is not None and delay > 0.0:

        delta = now - last_cmd
        if delta < delay:
            sleep = delay - delta
            time.sleep(sleep)

    return now