Humanize date differences

datedifference.py

#!/usr/bin/env python
# This function prints the difference between two python datetime objects
# in a more human readable form
#
# Adapted from: http://www.chimeric.de/blog/2008/0711_smart_dates_in_python

def humanize_date_difference(now, otherdate=None, offset=None):
    if otherdate:
        dt = otherdate - now
        offset = dt.seconds + (dt.days * 60*60*24)
    if offset:
        delta_s = offset % 60
        offset /= 60
        delta_m = offset % 60
        offset /= 60
        delta_h = offset % 24
        offset /= 24
        delta_d = offset
    else:
        raise ValueError("Must supply otherdate or offset (from now)")

    if delta_d > 1:
        if delta_d > 6:
            date = now + datetime.timedelta(days=-delta_d, hours=-delta_h, minutes=-delta_m)
            return date.strftime('%A, %Y %B %m, %H:%I')
        else:
            wday = now + datetime.timedelta(days=-delta_d)
            return wday.strftime('%A')
    if delta_d == 1:
        return "Yesterday"
    if delta_h > 0:
        return "%dh%dm ago" % (delta_h, delta_m)
    if delta_m > 0:
        return "%dm%ds ago" % (delta_m, delta_s)
    else:
        return "%ds ago" % delta_s

I believe that line 9 should be
dt = now - otherdate

Thanks for sharing the gist!