Source Code for Module django.utils.timesince

 1  import datetime 
 2  import time 
 3   
 4  from django.utils.tzinfo import LocalTimezone 
 5  from django.utils.translation import ungettext, ugettext 
 6   
 7 -def timesince(d, now=None): 
 8      """ 
 9      Takes two datetime objects and returns the time between d and now 
10      as a nicely formatted string, e.g. "10 minutes".  If d occurs after now, 
11      then "0 minutes" is returned. 
12   
13      Units used are years, months, weeks, days, hours, and minutes. 
14      Seconds and microseconds are ignored.  Up to two adjacent units will be 
15      displayed.  For example, "2 weeks, 3 days" and "1 year, 3 months" are 
16      possible outputs, but "2 weeks, 3 hours" and "1 year, 5 days" are not. 
17   
18      Adapted from http://blog.natbat.co.uk/archive/2003/Jun/14/time_since 
19      """ 
20      chunks = ( 
21        (60 * 60 * 24 * 365, lambda n: ungettext('year', 'years', n)), 
22        (60 * 60 * 24 * 30, lambda n: ungettext('month', 'months', n)), 
23        (60 * 60 * 24 * 7, lambda n : ungettext('week', 'weeks', n)), 
24        (60 * 60 * 24, lambda n : ungettext('day', 'days', n)), 
25        (60 * 60, lambda n: ungettext('hour', 'hours', n)), 
26        (60, lambda n: ungettext('minute', 'minutes', n)) 
27      ) 
28      # Convert datetime.date to datetime.datetime for comparison 
29      if d.__class__ is not datetime.datetime: 
30          d = datetime.datetime(d.year, d.month, d.day) 
31   
32      if not now: 
33          if d.tzinfo: 
34              now = datetime.datetime.now(LocalTimezone(d)) 
35          else: 
36              now = datetime.datetime.now() 
37   
38      # ignore microsecond part of 'd' since we removed it from 'now' 
39      delta = now - (d - datetime.timedelta(0, 0, d.microsecond)) 
40      since = delta.days * 24 * 60 * 60 + delta.seconds 
41      if since <= 0: 
42          # d is in the future compared to now, stop processing. 
43          return u'0 ' + ugettext('minutes') 
44      for i, (seconds, name) in enumerate(chunks): 
45          count = since // seconds 
46          if count != 0: 
47              break 
48      s = ugettext('%(number)d %(type)s') % {'number': count, 'type': name(count)} 
49      if i + 1 < len(chunks): 
50          # Now get the second item 
51          seconds2, name2 = chunks[i + 1] 
52          count2 = (since - (seconds * count)) // seconds2 
53          if count2 != 0: 
54              s += ugettext(', %(number)d %(type)s') % {'number': count2, 'type': name2(count2)} 
55      return s 
56   
57 -def timeuntil(d, now=None): 
58      """ 
59      Like timesince, but returns a string measuring the time until 
60      the given time. 
61      """ 
62      if not now: 
63          if getattr(d, 'tzinfo', None): 
64              now = datetime.datetime.now(LocalTimezone(d)) 
65          else: 
66              now = datetime.datetime.now() 
67      return timesince(now, d) 
68