Mercurial > hg > timedelta

comparison timedelta.py @ 0:78a59d65bfcc

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add timedelta
author Dirk Olmes <dirk@xanthippe.ping.de>
date Sat, 10 Jan 2009 03:50:20 +0100
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-1:000000000000 0:78a59d65bfcc
1
2 from datetime import time
3
4 def __toMicroseconds(time):
5 result = time.microsecond
6 result += time.second * 1000000
7 result += time.minute * 60 * 1000000
8 result += time.hour * 60 * 60 * 1000000
9 return result
10
11 def timedelta(t1, t2):
12 """Calculate the difference between to datetime.time objects
13
14 The result is returned as a time object as the datetime.timedelta does not provide
15 the same timeunits (hour, minute etc.) as the time objects that come as input to
16 this routine.
17
18 This method always returns a positive difference, i.e. the order in which the two
19 time objects are passed does not matter.
20 """
21 min = t1
22 max = t2
23 if t2 < t1:
24 min = t2
25 max = t1
26
27 total1 = __toMicroseconds(min)
28 total2 = __toMicroseconds(max)
29
30 difference = total2 - total1
31
32 hours = ((difference / 1000000) / 60) / 60
33 difference -= hours * 60 * 60 * 1000000
34
35 minutes = (difference / 1000000) / 60
36 difference -= minutes * 60 * 1000000
37
38 seconds = difference / 1000000
39 difference -= seconds* 1000000
40
41 micro = difference
42 return time(hour=hours, minute=minutes, second=seconds, microsecond=micro)
43