Humanize time intervals. humanize_time(173, "hours") --> [(1, 'week'), (5, 'hours')]

humanize_time.py

#!/usr/bin/env python

INTERVALS = [1, 60, 3600, 86400, 604800, 2419200, 29030400]
NAMES = [('second', 'seconds'),
         ('minute', 'minutes'),
         ('hour',   'hours'),
         ('day',    'days'),
         ('week',   'weeks'),
         ('month',  'months'),
         ('year',   'years')]

NAMES_SINGULAR = ['second', 'minute', 'hour', 'day', 'week', 'month', 'year']

def humanize_time(amount, units):
   result = []

   unit = map(lambda a: a[1], NAMES).index(units)
   # Convert to seconds
   amount = amount * INTERVALS[unit]

   for i in range(len(NAMES)-1, -1, -1):
      a = amount / INTERVALS[i]
      if a > 0: 
         result.append( (a, NAMES[i][1 % a]) )
         amount -= a * INTERVALS[i]

   return result