CSS選取器欄位解析的實現方法

根據上面所學的CSS基礎文法知識，現在來實現欄位的解析。首先還是解析標題。開啟網頁開發人員工具，找到標題所對應的原始碼。本文主要介紹了CSS選取器實現欄位解析的相關資料,需要的朋友可以參考下，希望能協助到大家

發現是在p class="entry-header"下面的h1節點中，於是開啟scrapy shell 進行調試

但是我不想要<h1>這種標籤該咋辦，這時候就要使用CSS選取器中的偽類方法。如下所示。

注意的是兩個冒號。使用CSS選取器真的很方便。同理我用CSS實現欄位解析。代碼如下

# -*- coding: utf-8 -*-  import scrapy  import re  class JobboleSpider(scrapy.Spider):      name = 'jobbole'      allowed_domains = ['blog.jobbole.com']      start_urls = ['http://blog.jobbole.com/113549/']      def parse(self, response):          # title = response.xpath('//p[@class = "entry-header"]/h1/text()').extract()[0]          # create_date = response.xpath("//p[@class = 'entry-meta-hide-on-mobile']/text()").extract()[0].strip().replace("·","").strip()          # praise_numbers = response.xpath("//span[contains(@class,'vote-post-up')]/h10/text()").extract()[0]          # fav_nums = response.xpath("//span[contains(@class,'bookmark-btn')]/text()").extract()[0]          # match_re = re.match(".*?(\d+).*",fav_nums)          # if match_re:          #     fav_nums = match_re.group(1)          # comment_nums = response.xpath("//a[@href='#article-comment']/span").extract()[0]          # match_re = re.match(".*?(\d+).*", comment_nums)          # if match_re:          #     comment_nums = match_re.group(1)          # content = response.xpath("//p[@class='entry']").extract()[0]  #通過CSS選取器提取欄位          title = response.css(".entry-header h1::text").extract()[0]          create_date = response.css(".entry-meta-hide-on-mobile::text").extract()[0].strip().replace("·","").strip()          praise_numbers = response.css(".vote-post-up h10::text").extract()[0]          fav_nums = response.css("span.bookmark-btn::text").extract()[0]          match_re = re.match(".*?(\d+).*", fav_nums)          if match_re:              fav_nums = match_re.group(1)          comment_nums = response.css("a[href='#article-comment'] span::text").extract()[0]          match_re = re.match(".*?(\d+).*", comment_nums)          if match_re:              comment_nums = match_re.group(1)          content = response.css("p.entry").extract()[0]          tags = response.css("p.entry-meta-hide-on-mobile a::text").extract()[0]          pass