how to findout local time using utcoffset and countryname in python

I have countrynames and utcoffset of that country开发者_StackOverflow How to find out out local time in that country using utcoffset?

Check out pytz for looking up timezones by location. Maybe something like this:

>>> import pytz, datetime
>>> pytz.country_timezones['de']
['Europe/Berlin']
>>> matching_tzs = [t for t in pytz.country_timezones['de'] if pytz.timezone(t)._utcoffset.total_seconds() == 3600]
>>> datetime.datetime.now(tz=pytz.timezone(matching_tzs[0]))
datetime.datetime(2011, 5, 6, 17, 5, 26, 174828, tzinfo=<DstTzInfo 'Europe/Berlin' CEST+2:00:00 DST>)

call datetime.now() with the time zone (as a tzinfo object) as an argument.

A country may span several timezones. A utc offset for a place may change through the time.

Given a country code and a utc offset, you could try to find matching timezone from Olson tz database for the current time. Here's variant of @Mu Mind's answer that takes into account current time (otherwise the result can be unexpected for some timezones):

from datetime import datetime, timedelta
import pytz

country_code, utc_offset = 'de', timedelta(hours=1)

# find matching timezones and print corresponding local time
now_in_utc = datetime.now(pytz.utc)
for zonename in pytz.country_timezones[country_code]:
    tz = pytz.timezone(zonename)
    local_time = now_in_utc.astimezone(tz)
    if tz.utcoffset(local_time) == utc_offset: #NOTE: utc offset depends on time
       print("%s\t%s" % (tz.zone, local_time.strftime("%Y-%m-%d %H:%M:%S %Z%z")))

Output

Europe/Berlin   2013-12-02 20:42:49 CET+0100

Save the current TZ environ variable value and then do

>>> os.environ['TZ'] = 'US/Eastern'
>>> time.tzset()

And for the library, whatever time function you use will be for the US/Eastern timezone, you c can reset it back to original one later.

Example usage:

>>> time.strftime('%X %x %Z')
'22:54:11 05/06/11 SGT'
>>> os.environ['TZ'] = 'US/Eastern'
>>> time.strftime('%X %x %Z')
'10:54:30 05/06/11 EDT'

Please refer to time module documentation for examples.

working code

utcoffset='+5:30'
utctime=datetime.datetime.utcnow()      
hr=utcoffset[0:utcoffset.find(':')]
min=utcoffset[utcoffset.find(':')+1:]
datetimeofclient=datetime.timedelta(hours=int(hr),minutes=int(min))