如何将python时间戳字符串转换为纪元? [英] How to convert python timestamp string to epoch?

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问题描述

我有以下字符串:

mytime = "2009-03-08T00:27:31.807Z"

如何在python中将其转换为纪元?

How do I convert it to epoch in python?

我尝试过:

import time
p = '%Y-%m-%dT%H:%M:%S'
int(time.mktime(time.strptime(s, p)))

但不适用于 31.807Z

推荐答案

有两个部分:


  1. 将时间字符串转换为细分时间。请参阅如何在python中解析ISO格式的日期?

  2. 将UTC时间转换为自纪元以来的秒数(POSIX时间戳)

  1. Convert the time string into a broken-down time. See How to parse ISO formatted date in python?
  2. Convert the UTC time to "seconds since the Epoch" (POSIX timestamp).





#!/usr/bin/env python
from datetime import datetime

utc_time = datetime.strptime("2009-03-08T00:27:31.807Z", "%Y-%m-%dT%H:%M:%S.%fZ")
epoch_time = (utc_time - datetime(1970, 1, 1)).total_seconds()
# -> 1236472051.807

如果您确定要忽略一小数秒并获得整数结果:

If you are sure that you want to ignore fractions of a second and to get an integer result:

#!/usr/bin/env python
import time
from calendar import timegm

utc_time = time.strptime("2009-03-08T00:27:31.807Z", "%Y-%m-%dT%H:%M:%S.%fZ")
epoch_time = timegm(utc_time)
# -> 1236472051

支持与a秒相对应的时间戳,例如 7月1日星期三2:59:60 MSK 2015 ,则可以结合使用 time.strptime () datetime (如果您关心leap秒,也应该考虑微秒)

To support timestamps that correspond to a leap second such as Wed July 1 2:59:60 MSK 2015, you could use a combination of time.strptime() and datetime (if you care about leap seconds you should take into account the microseconds too).

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