PythonExample.py

def get(self, request, *args, **kwargs):
    if self.request.GET['hub.verify_token'] == '7221896199':
        return HttpResponse(self.request.GET['hub.challenge'])
    else:
        return HttpResponse('Error, invalid token')

@method_decorator(csrf_exempt)
def dispatch(self, request, *args, **kwargs):
    return generic.View.dispatch(self, request, *args, **kwargs)

# POST function to handle Facebook messages
def post(self, request, *args, **kwargs):

    # Converts the text payload into a python dictionary
    incoming_message = json.loads(self.request.body.decode('utf-8'))