def _extract_item(self, response):
#???????
l = ItemLoader(response=response, item=MyspiderItem(), type='html')
l.add_xpath('movie_name', '//h1/span[@property="v:itemreviewed"]/text()')
l.add_xpath('movie_year', '//span[@property="v:initialReleaseDate"]/text()')
l.add_xpath('movie_type', '//span[@property="v:genre"]/text()')
l.add_xpath('movie_rate', '//strong[@class="ll rating_num"]/text()')
l.add_value('url', response.url)
#????????????load_item()????scrapy.Item??
#?scrapy-redis????json?item???????redis?item???
#??json?????python?????????????item?????
return dict(l.load_item())