每x秒调用一次函数(Python) [英] Call function every x seconds (Python)

问题描述

我想每10秒调用一个函数(实际上，它是一个Web API).但是该函数可能需要随机的t秒才能返回.(假设t为0.1到1.0秒)

I want to call a function (actually, it is a web API) every 10 seconds. But the function may take random t second to return. (Assume t is 0.1 to 1.0 sec)

我们能想到的最简单的代码是

The simplest code we can think of is

while True:
    func()          # take t sec
    time.sleep(10)  # sleep 10 sec

，但在这种情况下，每(1 + t)秒调用一次 func .有没有更好的方法来做到这一点?

but in this case, func is called every (1+t) seconds. Are there better ways to do it?

我们应该使用多线程还是类似的东西?具体的代码示例将不胜感激.谢谢.

Should we use some multi threading or something like that? Concrete code example will be appreciated. Thank you.

推荐答案

只需记住应该在何时进行下一次迭代，大致是这样的(不是完全有效的代码，我敢肯定您可以从这里弄清楚):

Just remember when the next iteration is supposed to happen, roughly like this (not fully working code, I'm sure you can figure it out from here):

import time
nexttime = time.time()
while True:
    func()          # take t sec
    nexttime += 10
    sleeptime = nexttime - time.time()
    if sleeptime > 0:
        time.sleep(sleeptime)

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