Time Duration Computation

The duration format code is not ideal, but as the code notes, the icu library does not appear to support internationalizing dates. Therefore, this approach tries to get close enough to be flexible enough for most localization. Only time, and localizers, will tell if it is a reasonable approach.

The formatter always gives the first two pertinent measures of a duration, leaving off the rest. The rest of the file just shows some examples.

>>> from zc.i18n.duration import format
>>> from zope.publisher.browser import TestRequest
>>> request = TestRequest()
>>> from datetime import timedelta
>>> format(request, timedelta(days=5))
u'5 days '
>>> format(request, timedelta(days=1))
u'1 day '
>>> format(request, timedelta(days=1, hours=13, minutes=12))
u'1 day 13 hours '
>>> format(request, timedelta(hours=13, minutes=12))
u'13 hours 12 minutes '
>>> format(request, timedelta(hours=13))
u'13 hours '
>>> format(request, timedelta(hours=1, minutes=1, seconds=1))
u'1 hour 1 minute '
>>> format(request, timedelta(minutes=45, seconds=1))
u'45 minutes 1 second'
>>> format(request, timedelta(seconds=5))
u'5 seconds'
>>> format(request, timedelta(days=-1, hours=-2))
u'-1 day -2 hours '
>>> format(request, timedelta(days=-2, hours=22))
u'-1 day -2 hours '
>>> format(request, timedelta(days=-1))
u'-1 day '
>>> format(request, timedelta(days=-1, hours=-13, minutes=-12))
u'-1 day -13 hours '
>>> format(request, timedelta(hours=-13, minutes=-12))
u'-13 hours -12 minutes '
>>> format(request, timedelta(hours=-13))
u'-13 hours '
>>> format(request, timedelta(hours=-1, minutes=-1, seconds=-1))
u'-1 hour -1 minute '
>>> format(request, timedelta(minutes=-45, seconds=-1))
u'-45 minutes -1 second'
>>> format(request, timedelta(seconds=-5))
u'-5 seconds'
>>> format(request, timedelta())
u'No time'

CHANGES