在 Windows 上获取本地时区名称(Python 3.9 zoneinfo)
问题描述
查看 zoneinfo Python 3.9 中的模块，我想知道它是否还提供了一个方便的选项来检索 Windows 上的本地时区(操作系统设置).
Checking out the zoneinfo module in Python 3.9, I was wondering if it also offers a convenient option to retrieve the local time zone (OS setting) on Windows.
在 GNU/Linux 上，你可以这样做
On GNU/Linux, you can do
from datetime import datetime
from zoneinfo import ZoneInfo
naive = datetime(2020, 6, 11, 12)
aware = naive.replace(tzinfo=ZoneInfo('localtime'))
但在 Windows 上，会抛出
but on Windows, that throws
ZoneInfoNotFoundError: '没有找到关键本地时间的时区'
ZoneInfoNotFoundError: 'No time zone found with key localtime'
所以我还需要使用第三方库吗?例如
so would I still have to use a third-party library? e.g.
import time
import dateutil
tzloc = dateutil.tz.gettz(time.tzname[time.daylight])
aware = naive.replace(tzinfo=tzloc)
由于 time.tzname[time.daylight] 返回一个本地化名称(在我的例子中是德语，例如Mitteleuropäische Sommerzeit")，这也不起作用:
Since time.tzname[time.daylight] returns a localized name (German in my case, e.g. 'Mitteleuropäische Sommerzeit'), this doesn't work either:
aware = naive.replace(tzinfo=ZoneInfo(tzloc))
有什么想法吗?
附言在 Python 上试试这个 <3.9，使用backports(另见this answer):
p.s. to try this on Python < 3.9, use backports (see also this answer):
pip install backports.zoneinfo
pip install tzdata # needed on Windows
解决方案
使用系统本地时区不需要使用zoneinfo.您可以在调用 None(或省略)时区rel="noreferrer">datetime.astimezone.
You don't need to use zoneinfo to use the system local time zone. You can simply pass None (or omit) the time zone when calling datetime.astimezone.
来自文档:
如果调用时不带参数(或使用 tz=None)，则假定系统本地时区.转换后的日期时间实例的 .tzinfo 属性将设置为时区实例，其区域名称和偏移量从操作系统获取.
If called without arguments (or with
tz=None) the system local timezone is assumed. The.tzinfoattribute of the converted datetime instance will be set to an instance of timezone with the zone name and offset obtained from the OS.
因此:
from datetime import datetime
naive = datetime(2020, 6, 11, 12)
aware = naive.astimezone()
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