Created
March 11, 2012 00:53
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Implementing a Python datetime localizer using python-dateutil
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| from dateutil import tz | |
| def _convert_tz(val, from_tzinfo, to_tzinfo): | |
| # Interpret the naive datetime as in the 'from' time zone | |
| val = val.replace(tzinfo=from_tzinfo) | |
| # Convert to specified time zone | |
| val = val.astimezone(to_tzinfo) | |
| # Make it a naive datetime again | |
| val = val.replace(tzinfo=None) | |
| return val | |
| def convert_tz(val, from_zone, to_zone): | |
| """Converts a naive datetime object between two Olson time zones""" | |
| return _convert_tz(val, tz.gettz(from_zone), tz.gettz(to_zone)) | |
| def localize(val, to_zone=None): | |
| """Localizes the specified datetime object from UTC to the given Olson time zone""" | |
| to_tzinfo = tz.gettz(to_zone) if to_zone else tz.tzlocal() | |
| return _convert_tz(val, tz.tzutc(), to_tzinfo) | |
| def to_utc(val, from_zone=None): | |
| """Takes a naive datetime object presumed to be in the given Olson time zone and converts it to UTC.""" | |
| from_tzinfo = tz.gettz(from_zone) if from_zone else tz.tzlocal() | |
| return _convert_tz(val, from_tzinfo, tz.tzutc()) |
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