Send new eventbrite orders to a Slack channel (Django view function)

eventbrite_to_slack.py

from django.http import HttpResponse
from django.views.decorators.csrf import csrf_exempt
import requests, json

# Get an OAuth token from https://www.eventbrite.com/myaccount/apps/
# Create a new app, then expand the expandy-thingy and copy out the
# 'Your personal OAuth token' value.
EVENTBRITE_OAUTH_TOKEN = '...'

# Should look something like https://yoursite.slack.com/services/hooks/incoming-webhook?token=xxx...xxx
SLACK_URL = 'https://...'
SLACK_CHANNEL = '#webhooks_demo'
SLACK_USERNAME = 'Eventbrite'
SLACK_ICON_URL = 'https://dl.dropboxusercontent.com/u/2434252/2014/eventbrite_e_icon_ff8000_gradient.png'


def send_to_slack(order_info):
    requests.post(SLACK_URL, {
        'payload': json.dumps({
            'channel': SLACK_CHANNEL,
            'username': SLACK_USERNAME,
            'icon_url': SLACK_ICON_URL,
            'text': message_from_order_details(order_info, include_event=True)
        })
    })


def message_from_order_details(order_info, include_event=False):
    message = '%s ordered %d ticket%s' % (
        order_info['email'],
        len(order_info['attendees']),
        's' if len(order_info['attendees']) > 1 else ''
    )
    if include_event:
        message += ' for <%(event_url)s|%(event_title)s>' % {
            'event_url': order_info['event']['url'],
            'event_title': order_info['event']['name']['text'],
        }
    return message


@csrf_exempt
def webhook_receive(request):
    message = json.loads(request.body)
    api_url = message['api_url']
    api_url = '%s?token=%s&expand=event,event.ticket_classes,attendees' % (api_url, EVENTBRITE_OAUTH_TOKEN)
    order_info = requests.get(api_url).json()
    send_to_slack(order_info)
    return HttpResponse('Got order: %s' % repr(order_info))

How do you use this script? Could I get a step by step on how to set this up?