Add timestamps in python -

how add following timestamps month wise in python 2.4 i.e, timestamps occurring in month 3 should added together.

for example: result should on 2011-03 total timestamp 1:00:45 , on other months..

2011-03-07  0:27:41 2011-03-06  0:13:41 2011-03-08  0:17:40 2011-03-04  0:55:40 2011-05-16  0:55:40 2011-05-18  0:55:40 2011-07-16  0:55:40 2011-07-17  0:55:40 

how this:

import datetime import re collections import defaultdict months = defaultdict(int) # months = {}  # python 2.4 open("test.txt") timestamps:     line in timestamps:         month = line[:7]         time = re.search(r"(\d+):(\d+):(\d+)", line)         if time:              seconds = int(time.group(1))*3600 + \                        int(time.group(2))*60 +   \                        int(time.group(3))              months[month] += seconds              # if month in months:          # python 2.4              #     months[month] += seconds              # else:              #     months[month] = seconds month in sorted(months.keys()):     print("times {}: {}".format(month,                                      datetime.timedelta(seconds=months[month]))) 

output:

times 2011-03: 1:54:42 times 2011-05: 1:51:20 times 2011-07: 1:51:20