import re def version_cmp(version1, version2): def normalize(v): return [int(x) for x in re.sub(r'(\.0+)*$','', v).split(".")] return cmp(normalize(version1), normalize(version2)) def date_interval_to_seconds(interval): """ Convert timedelta object into int representing the number of seconds. If number of seconds is less than 0, then return 0. """ seconds = (interval.microseconds + \ (interval.seconds + interval.days * 24 * 3600) * 10 ** 6) / float(10 ** 6) return seconds