在Python中如何将本地时间转换为UTC？ [英] How do I convert local time to UTC in Python?

问题描述

如何将本地时间的日期时间字符串转换为UTC时间的字符串？

How do I convert a datetime string in local time to a string in UTC time?

I 我确定我以前做过，但是找不到，而且将来希望帮助我（和其他人）这样做。

I'm sure I've done this before, but can't find it and SO will hopefully help me (and others) do that in future.

澄清：例如，如果我的本地时区（ [phone]:02:00 c $ c>），我想生成一个字符串，具有等价的 UTC time： 2008-09-17 04:02:00 。

Clarification: For example, if I have 2008-09-17 14:02:00 in my local timezone (+10), I'd like to generate a string with the equivalent UTC time: 2008-09-17 04:02:00.

另外，从 http://lucumr.pocoo.org/2011/7/15/eppur-si-muove/ ，请注意，一般来说，这是不可能的，与DST等问题没有从本地时间到UTC时间的唯一转换。

Also, from http://lucumr.pocoo.org/2011/7/15/eppur-si-muove/, note that in general this isn't possible as with DST and other issues there is no unique conversion from local time to UTC time.

推荐答案

感谢@rofly，从字符串到字符串的完整转换如下：

Thanks @rofly, the full conversion from string to string is as follows:

time.strftime("%Y-%m-%d %H:%M:%S", 
              time.gmtime(time.mktime(time.strptime("2008-09-17 14:04:00", 
                                                    "%Y-%m-%d %H:%M:%S"))))

我的时间的总结 / 日历功能：

time.strptime

string - > tuple（没有时区应用，所以匹配字符串）

time.strptime
string --> tuple (no timezone applied, so matches string)

time.mktime

当地时间元组 - >从时代（总是当地时间）开始的秒数

time.mktime
local time tuple --> seconds since epoch (always local time)

time.gmtime

秒，因为epoch - > tuple在UTC

time.gmtime
seconds since epoch --> tuple in UTC

和

日历.timegm

tuple in UTC - > epoch

calendar.timegm
tuple in UTC --> seconds since epoch

time.localtime

秒从epoch - > tuple在本地时区

time.localtime
seconds since epoch --> tuple in local timezone

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