CODE EXAMPLE FOR PYTHON

scrapy itemloader example

def parse_question(self, response):
        # ??question????????????question item
        question_id = response.meta.get("zhihu_id", "")
        item_loader = ItemLoader(item=ZhihuQuestionItem(), response=response)
        item_loader.add_css("title", "h1.QuestionHeader-title::text")
        item_loader.add_css("content", ".QuestionHeader-detail")
        item_loader.add_value("url", response.url)
        item_loader.add_value("zhihu_id", question_id)
        item_loader.add_css("answer_num", ".List-headerText span::text")
        item_loader.add_css("comments_num", ".QuestionHeader-actions button::text")
        item_loader.add_css("watch_user_num", ".NumberBoard-value::text")
        item_loader.add_css("topics", ".QuestionHeader-topics .Popover div::text")

        question_item = item_loader.load_item()

        yield scrapy.Request(self.start_answer_url.format(question_id, 20, 0), headers=self.headers, callback=self.parse_answer)
        yield question_item