timesince.py

   1 #!/usr/bin/python
   2
   3 import time
   4
   5
   6 # Adapted from
   7 #  http://code.djangoproject.com/browser/django/trunk/django/utils/timesince.py
   8 #  Modified that it takes GMT-zone UNIX time in seconds
   9
  10 def pluralize(singular, plural, count):
  11     if count == 1:
  12         return singular
  13     else:
  14         return plural
  15
  16
  17 def timesince(d, now=None):
  18     """
  19     Takes two datetime objects and returns the time between then and now
  20     as a nicely formatted string, e.g "10 minutes"
  21     Adapted from http://blog.natbat.co.uk/archive/2003/Jun/14/time_since
  22     (Can check it in the Internet Archive)
  23     """
  24     chunks = (
  25         (60 * 60 * 24 * 365, lambda n: pluralize('year', 'years', n)),
  26         (60 * 60 * 24 * 30, lambda n: pluralize('month', 'months', n)),
  27         (60 * 60 * 24 * 7, lambda n: pluralize('week', 'weeks', n)),
  28         (60 * 60 * 24, lambda n: pluralize('day', 'days', n)),
  29         (60 * 60, lambda n: pluralize('hour', 'hours', n)),
  30         (60, lambda n: pluralize('minute', 'minutes', n)))
  31     # Convert time to UNIX seconds format for comparison
  32     if d.__class__ is not int:
  33         d = int(d)
  34     if not now:
  35         now = int(time.time())
  36
  37     since = now - d
  38     if since <= 0:
  39         return 'moments'
  40
  41     for i, (seconds, name) in enumerate(chunks):
  42         count = since / seconds
  43         if count != 0:
  44             break
  45
  46     if count <= 0:
  47         return 'less then a minute'
  48
  49     s = '%d %s' % (count, name(count))
  50     if i + 1 < len(chunks):
  51         # Now get the second item
  52         seconds2, name2 = chunks[i + 1]
  53         count2 = (since - (seconds * count)) / seconds2
  54         if count2 != 0:
  55             s += ', %d %s' % (count2, name2(count2))
  56     return s
  57
  58
  59 def timeuntil(d, now=None):
  60     """
  61     Like timesince, but returns a string measuring the time until
  62     the given time.
  63     """
  64     if now == None:
  65         now = int(time.time())
  66     return timesince(now, d)