Fetch Data from API | Python Fiddle

def get_aggregated_data(domain, url, num_days = 7):
    today = datetime.date.today()
    #I have been testing for 1-3 days
    page_views = []
    visits = []
    for _day in daterange(today - datetime.timedelta(days=num_days), today):
        print _day
        _url = replace_query_param(url, 'period_a', 'D' + _day.strftime('%Y%m%d'))
        _url = replace_query_param(_url, 'format', _day.strftime('JSON'))
        _data = requests.get(_url, timeout=600)
        try:
            _json_data = simplejson.loads(_data.content)
            page_views.append(_json_data['Data']['TotalRow'][1]['value'])
            visits.append(_json_data['Data']['TotalRow'][3]['value'])
        except ValueError:
            raise "CoremetricsAPIUnavailable"
      """
        # I always get a generic exception when I uncomment this. Else it works fine.
        try:
            if _json_data['Header']['PeriodA']['type'] != "DAILY":
                raise ValueError('Invalid period type from coremetrics for domain %s' % domain)
            if _json_data['Header']['PeriodA']['startDate'] != _day.strftime('%Y%m%d') or 
            _json_data['Header']['PeriodA']['endDate'] != day.strftime('%Y%m%d'):
                raise ValueError('Invalid dates received from coremetrics for domain %s' % domain)
        except Exception as e:
            tracking_type = "CM"
            logger.exception("Error while processing %s data for %s, %s" % (tracking_type, domain, str(_day)))
            raise ValueError('Invalid data from coremetrics for domain %s' % domain)
        """

for i in range(0,len(page_views)):
        print page_views[i]
        print visits[i]

total_page_views = sum(page_views)
    total_visits = sum(visits)
    return total_page_views, total_visits

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