gistfile1.py

    def parse_event(self, response):
        # self.log('Hi, this is an event page! %s' % response.url)
        hxs = HtmlXPathSelector(response)

        event_view_div = hxs.select('//div[@class="event_view"]')

        event = Event()

        event_loader = XPathItemLoader(event, event_view_div)
        event_loader.add_value('source', self.name)
        event_loader.add_value('guid', response.url)
        event_loader.add_value('url', response.url)
        event_loader.add_xpath('title', '//div[@class="event_view_head"]//h1[@class="headline title"]/a/text()')
        event_loader.add_xpath('description', '//div[@class="event_article"]//p[@class="description"]/text()')
        event_loader.load_item()

        location_url = event_view_div.select('//div[@class="event_view"]//span[@class="sm_venue"]/a[contains(@href, "/locations/")]/@href').extract()[0]
        yield Request('/'.join((base_url, location_url)), callback=self.parse_location, meta={'event': event})
        yield event