import datetime, math, time from django.utils.tzinfo import LocalTimezone from django.utils.translation import ngettext def timesince(d, now=None): """ Takes a datetime object, returns the time between then and now as a nicely formatted string, e.g "10 minutes" Adapted from http://blog.natbat.co.uk/archive/2003/Jun/14/time_since """ chunks = ( (60 * 60 * 24 * 365, lambda n: ngettext('year', 'years', n)), (60 * 60 * 24 * 30, lambda n: ngettext('month', 'months', n)), (60 * 60 * 24, lambda n : ngettext('day', 'days', n)), (60 * 60, lambda n: ngettext('hour', 'hours', n)), (60, lambda n: ngettext('minute', 'minutes', n)) ) if now: t = time.mktime(now) else: t = time.localtime() if d.tzinfo: tz = LocalTimezone() else: tz = None now = datetime.datetime(t[0], t[1], t[2], t[3], t[4], t[5], tzinfo=tz) delta = now - d since = delta.days * 24 * 60 * 60 + delta.seconds for i, (seconds, name) in enumerate(chunks): count = since / seconds if count != 0: break if count < 0: return '%d milliseconds' % math.floor(delta.microseconds / 1000) s = '%d %s' % (count, name(count)) if i + 1 < len(chunks): # Now get the second item seconds2, name2 = chunks[i + 1] count2 = (since - (seconds * count)) / seconds2 if count2 != 0: s += ', %d %s' % (count2, name2(count2)) return s def timeuntil(d): """ Like timesince, but returns a string measuring the time until the given time. """ now = datetime.datetime.now() return timesince(now, time.mktime(d.timetuple()))