如何根据当地时区和夏令时获取 UTC + x 号码？

Question

如何根据当地时区和夏令时获取 UTC + x 号码？

示例：假设我们处于 Paris/France 时区。对于冬季日期时间（1 月 1 日，00:55:23），我们期望 0001:

import datetime
print datetime.datetime(2018, 01, 01, 00, 55, 23).strftime('%z') 
# empty string because the datetime is naive
# expecting 0001

对于夏季日期时间，我们期望 0002:

print datetime.datetime(2018, 07, 01, 00, 55, 23).strftime('%z') 
# expecting 0002

Answer 1

使用dateutil:

from dateutil import tz
from datetime import datetime

paris = tz.gettz('Europe/Paris')

dt1 = datetime(2018, 1, 1, 0, 55, 23, tzinfo=paris)
dt2 = datetime(2018, 7, 1, 0, 55, 23, tzinfo=paris)

print(dt1.strftime('%z'))  # prints +0100
print(dt2.strftime('%z'))  # prints +0200

或者，使用 pytz:

from pytz import timezone
from datetime import datetime

paris = timezone('Europe/Paris')

dt1 = paris.localize(datetime(2018, 1, 1, 0, 55, 23))
dt2 = paris.localize(datetime(2018, 7, 1, 0, 55, 23))

print(dt1.strftime('%z'))  # prints +0100
print(dt2.strftime('%z'))  # prints +0200

如何根据当地时区和夏令时获取 UTC + x 号码？

How to get the UTC + x number, according to local timezone and daylight saving?

python

timezone

datetime

dst