在python中,如何将特定本地时间(而非本地时间)中的日期时间转换为UTC [英] In python how do I convert a datetime in a specific local time (not my local) to UTC
问题描述
我从伦敦的一家服务中提取数据,他们在给我伦敦本地时间的日期和时间信息。所以冬天是UTC,夏天是BST(UTC + 1)。
I'm pulling data from a London based service and they are giving me date&time info in London local time.So UTC in winter and BST(UTC+1) in summer.
我们内部使用UTC进行所有操作,在Python中如何将伦敦的东西转换为UTC,以解决夏时制?
Internally we use UTC for everything, in Python how do I convert the London stuff to UTC in a way that will account for daylight savings?
I请注意,DST过渡周围的某些时间是模棱两可的,只要在一年中的其余时间都可以使用,就可以接受。
I appreciate that some times around the DST rollover are ambiguous, that's acceptable as long as it works the rest of the year.
出于完整性考虑,我从以下信息中获取以下信息:他们:
For completeness, I'm getting the following info from them:
dt="2012-10-12T19:30:00"
lcnid="LDN"
locale="en-gb"
推荐答案
您需要使用时区对象;这些都不是Python本身附带的,因为数据经常更改。不过, pytz
库易于安装。
You need to use a timezone object; these don't come with Python itself as the data changes too often. The pytz
library is easily installed though.
示例转换:
>>> import pytz
>>> import datetime
>>> bst = pytz.timezone('Europe/London')
>>> dt = datetime.datetime.strptime('2012-10-12T19:30:00', '%Y-%m-%dT%H:%M:%S')
>>> dt
datetime.datetime(2012, 10, 12, 19, 30)
>>> bst.localize(dt)
datetime.datetime(2012, 10, 12, 19, 30, tzinfo=<DstTzInfo 'Europe/London' BST+1:00:00 DST>)
>>> bst.localize(dt).astimezone(pytz.utc)
datetime.datetime(2012, 10, 12, 18, 30, tzinfo=<UTC>)
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