gistfile1.py

def _verify_new_instances_for_existing_businesses(subscription_group, new_groups):
    for subscription in subscription_group['subscriptions']:
        for instance_group in new_groups:
            if subscription['monitored']['business_id'] == instance_group['business_id']:
                for instance in instance_group['instances']:
                    update = False
                    old_instances = [ monitored_item['instance'] for monitored_item in monitored['monitored_list'] ]
                    if not instance in old_instances:
                        update = True
                        new_listing_found_alert(subscription, instance, instance['type'])
                if update:
                    subscription.update_monitored(instance_group)