On Wed, Jun 25, 2014 at 10:53 PM, <codetars...@gmail.com> wrote: > I'm looking for a python-library which can help me to get Timezone and > Timezone-offset(UTC) from latitude/longitude. > > I'm not able to find an easy way to do it.
There isn't an easy way to do it. At best, you would have to do a two-step lookup: first, figure out what country and city you're in, based on lat/long; and then, look up the appropriate timezone from the city. Unfortunately that won't actually be perfect, because there are points on this planet's surface that cannot be unambiguously assigned timezones... because timezones are really messy. Normally, the way to define timezones would be with the Olsen database (tzdata), which defines "Australia/Melbourne" (where I live), "America/Merida" (which is not a reimagining of "Brave" on a different continent), "Africa/Libreville" (which presumably is where a popular office suite came from), and so on. If you can get your users to pick based on those, your work will be easy and unambiguous. Otherwise, you're going to have a lot of work trying to recreate that... Why do you need to work this out? Are you trying to use a user's IP geolocation data to pick a timezone? Because that's doomed to failure. Even if you have something like a phone's GPS fix, trying to guess the timezone based on that is a bad idea. In fact, guessing is almost always a bad idea. On the other hand, if all you need is a rough approximation, just take the longitude (positive if you're east of Greenwich, negative if west), and multiply it by 24 hours/360° to get a theoretical timezone. That's good enough for planting on a map, or for getting a rough idea of whether it's morning, noon, evening, or night; most actual civil timezones will be broadly near to that figure. (Some are a long way away from it, though. New Zealand's Chatham Islands are at around 176.5°W, for a theoretical timezone of roughly UTC-11:45, but the actual timezone is UTC+12:45, almost but not exactly an entire day ahead of where you might think.) Of course, that ignores every civil invention, including the abomination of DST, but that might be considered an advantage rather than a flaw... ChrisA -- https://mail.python.org/mailman/listinfo/python-list