scrapy item loader replace code example

Example 1: scrapy itemloader example

def parse_question(self, response):
        question_pattern = re.compile('(.*zhihu.com/question/(\d+))(/|$).*')
        match_object = re.match(question_pattern, response.url)
        question_id = match_object.group(2)
        item_loader = ItemLoader(item=ZhihuQuestionItem(), response=response)
        item_loader.add_value('zhihu_id', question_id)
        item_loader.add_css('title', 'h1.QuestionHeader-title::text')
        item_loader.add_css('topics', '.TopicLink .Popover div::text')
        item_loader.add_value('url', response.url)
        item_loader.add_css('content', '.QuestionHeader-detail div div span::text')
        item_loader.add_css('answer_num', '.List-headerText span::text')
        item_loader.add_css('comments_num', '.QuestionHeader-Comment button::text')
        item_loader.add_css('watch_user_num', '.NumberBoard-value::text')

        item = item_loader.load_item()
        yield item
        yield scrapy.Request(self.start_answer_url.format(question_id=question_id, offset=0, limit=20),
                             headers=self.headers, callback=self.parse_answer)

Example 2: scrapy itemloader example

def parse(self, response):
        mongoClient = mongodb_client('localhost', 27017)
        list = []
        print "************************"
        # print response.xpath('//div[@class="about_fonts clearfix"]/p[@class="time_f"]/text()').extract()
        player_away = response.xpath('//table[@id="J_away_content"]/tbody/tr')
        player_home = response.xpath('//table[@id="J_home_content"]/tbody/tr')
        if player_away:
            for player in player_away:
                playerName=player.xpath('td/a/text()').extract()
                if playerName:
                    list.append(playerName + player.xpath('td/text()').extract())
            for player in player_home:
                playerName = player.xpath('td/a/text()').extract()
                if playerName:
                    list.append(playerName + player.xpath('td/text()').extract())
            # print response.xpath('//div[@class="message"]/h2/text()').extract()
            print "************************"

            time = response.xpath('//div[@class="about_fonts clearfix"]/p[@class="time_f"]/text()').extract()
            team = response.xpath('//div[@class="message"]/p/a/text()').extract()
            score = response.xpath('//div[@class="message"]/h2/text()').extract()
            url = response.url

            g = game(time, team, score, list, url)
            print g.__dict__
            # json_g = parsejson(g)
            # print json_g

            # g = ItemLoader(game(), response=response)
            # g.add_xpath('time', '//div[@class="about_fonts clearfix"]/p[@class="time_f"]/text()')
            # g.add_xpath('team', '//div[@class="message"]/p/a/text()')
            # g.add_xpath('score', '//div[@class="message"]/h2/text()')
            # g.add_value('players', list)
            # return g.load_item()

            client = mongoClient.connect()
            db = mongoClient.useDB(client, "hupu_data")
            print mongoClient.insert_one(db, "games", g.__dict__)