python – 从UTC偏移量获取时区名称

#!/usr/bin/env python
from datetime import datetime,timedelta
import pytz  # $pip install pytz

utc_offset = timedelta(hours=5,minutes=30)  # +5:30
now = datetime.now(pytz.utc)  # current time
print({tz.zone for tz in map(pytz.timezone,pytz.all_timezones_set)
       if now.astimezone(tz).utcoffset() == utc_offset})

产量

set(['Asia/Colombo','Asia/Calcutta','Asia/Kolkata'])

如果您想要考虑历史数据(根据当前时区规则在某个日期具有/将具有给定utc偏移的时区)：

#!/usr/bin/env python
from datetime import datetime,minutes=30)  # +5:30
names = set()
now = datetime.now(pytz.utc)
for tz in map(pytz.timezone,pytz.all_timezones_set):
    dt = now.astimezone(tz)
    tzinfos = getattr(tz,'_tzinfos',[(dt.utcoffset(),dt.dst(),dt.tzname())])
    if any(off == utc_offset for off,_,_ in tzinfos):
        names.add(tz.zone)
print("n".join(sorted(names)))

产量

Asia/Calcutta
Asia/Colombo
Asia/Dacca
Asia/Dhaka
Asia/Karachi
Asia/Kathmandu
Asia/Katmandu
Asia/Kolkata
Asia/Thimbu
Asia/Thimphu