Mine

from django.template import Libraryimport datetimeregister = Library()@register.filter(name='ago')def ago(value, recent=None):    "Returns a nicely formatted time difference"    if recent is None:        recent = datetime.datetime.now()    difference = recent - value    weeks, days = divmod(difference.days, 7)    minutes, seconds = divmod(difference.seconds, 60)    hours, minutes = divmod(minutes, 60)    if weeks > 0:        output = "%s week" % weeks        if weeks > 1:            output +='s'    elif days > 0:        output = "%s day" % days        if days > 1:            output+='s'    elif hours > 0:        output = "%s hour" % hours        if hours > 1:            output+='s'    elif minutes > 0:        output = "%s minute" % minutes        if minutes > 1:            output+='s'    elif seconds > 0:        output = "% second" % seconds        if seconds > 1:            output+='s'    else:        output = ""    return output