使用Python：x：00重复的间隔

Question

如何安排重复计时器5分钟间隔。在00秒钟发射什么，然后在00时重复。好的，不是实时的，而是在系统滞后时尽可能近。试图避免在滞后堆积并接近00。

Lang：Python，OS：WinxP X64

系统具有25毫秒的分辨率。

任何代码都会有所帮助，tia

Answer 1

我不知道该如何准确地做 螺纹. 。它是“一声”，但这只是意味着您安排的功能必须立即重新安排本身，再过300秒，第一件事。 （您可以通过测量确切的时间来添加准确性 time.time 每次都相应地改变下一个调度延迟）。

Answer 2

尝试比较这两个代码示例的时间打印输出：

代码样本1

import time
delay = 5

while True:
    now = time.time()
    print time.strftime("%H:%M:%S", time.localtime(now))

    # As you will observe, this will take about 2 seconds,
    # making the loop iterate every 5 + 2 seconds or so.
    ## repeat 5000 times
    for i in range(5000):
        sum(range(10000))

    # This will sleep for 5 more seconds
    time.sleep(delay)

代码样本2

import time
delay = 5

while True:
    now = time.time()
    print time.strftime("%H:%M:%S", time.localtime(now))

    # As you will observe, this will take about 2 seconds,
    # but the loop will iterate every 5 seconds because code 
    # execution time was accounted for.
    ## repeat 5000 times
    for i in range(5000):
        sum(range(10000))

    # This will sleep for as long as it takes to get to the
    # next 5-second mark
    time.sleep(delay - (time.time() - now))