gistfile1.py

@property
    def render_business_hours(self):
        today = datetime.today()
        day_table = [
            'mon',
            'tues',
            'wed',
            'thurs',
            'fri',
            'sat',
            'sun'
        ]
        timezone = pytz.timezone(self.timezone)
        loc_dt = timezone.localize(today)

        days = {}
        groups = {}
        prev_hours = None
        index_holder = []
        time_holder = []
        html = ''
        prev_time = None

        for node in self.timenode_set.all():
            for weekday in node.weekdays:
                if int(weekday) not in days:
                    days[int(weekday)] = []
                days[int(weekday)].append('%s:%s' % (
                    node.start.strftime('%H%M'), node.end.strftime('%H%M')))

        for weekday, value in days.iteritems():
            str_hours = '|'.join(value)
            if prev_hours is not None and str_hours is prev_hours:
                continue
            else:
                prev_hours = str_hours
                if str_hours not in groups:
                    groups[str_hours] = []
                groups[str_hours].append(weekday)

        for iday in range(0, 7):
             for time, weekdays in groups.iteritems():
                if iday in weekdays:
                    if time is prev_time:
                        index_holder[len(index_holder) - 1].append(iday)
                    else:
                        prev_time = time
                        index_holder.append([iday])
                        time_holder.append(time)
        
        for index in range(0, len(index_holder)):
            day_set = index_holder[index]
            time = time_holder[index]
            hgroup = []
            element = '<li>'
            for hour_set in time.split('|'):
                start, end = hour_set.split(':')
                dt_start = datetime(
                    today.year,
                    today.month,
                    today.day,
                    int(start[:2]), 
                    int(start[2:])).strftime('%I:%M%p')
                dt_end = datetime(
                    today.year,
                    today.month,
                    today.day,
                    int(end[:2]),
                    int(end[2:])).strftime('%I:%M%p')
                hgroup.append('%s - %s' % (dt_start, dt_end))
            if len(day_set) > 1:
                element = element + '<span>%s - %s</span>' % (
                    day_table[day_set[0]],
                    day_table[day_set[-1]],)
            else:
                element = element + '<span>%s</span>' % (
                    day_table[day_set[0]],)
            element = element + ' %s %s </li>' % (' & '.join(hgroup),
                loc_dt.strftime('%Z'))
            html = html + element
        return html