我正在抓取 Dmoz 網(wǎng)站，我抓取了關(guān)于頁面，但是當(dāng)我按名稱創(chuàng)建另一個(gè)函數(shù)parse_editor并嘗試抓取時(shí)，它沒有給我結(jié)果。from ..items import DmoztutorialItemimport scrapyclass DmozSpiderSpider(scrapy.Spider):    name = 'Dmoz'    start_urls = ['http://dmoz-odp.org/']    about_page = 'http://dmoz-odp.org/docs/en/about.html'    editor = 'http://dmoz-odp.org/docs/en/help/become.html'    def parse(self, response):        # collect data on first page        items = {            'Navbar': response.css('#main-nav a::text').extract(),            'Category_names': response.css('.top-cat a::text').extract(),            'Subcategories': response.css('.sub-cat a::text').extract(),            'About_page': self.about_page,            'Become_an_editor': self.editor        }        # save and call request to another page        yield response.follow(self.about_page, self.parse_about, self.editor, self.parse_editor, meta={'items': items})    def parse_about(self, response):        # do your stuff on second page        items = response.meta['items']         items['Headings'] = response.css('h2::text , #mainContent h1::text').extract()  # add your logics        items['Paragraphs'] = response.css('p::text').extract()        items['3 Projects'] = response.css('li~ li+ li b a::text , li:nth-child(1) b a::text').extract()        items['About Dmoz'] = response.css('.nav ul a::text , li:nth-child(2) b a::text').extract()        items['Languages'] = response.css('.nav~ .nav a::text').extract()        items['You can make a difference'] = response.css('dd::text , #about-contribute::text').extract()        items['Further information'] = response.css('li::text , #about-more-info a::text').extract()        yield items    def parse_editor(self, response):        # do your stuff on third page        editor_items = response.meta['items']        editor_items['Heading'] = response.css('#mainContent h1::text').extract()        yield editor_items