text: # -*- coding: utf-8 -*
  
  import re
  from urllib import parse
  from bs4 import BeautifulSoup
  
  class HtmlParser(object):
      def _get_new_urls(self, parse_url, soup):
          # /item/xxx
          new_urls = set()
          links = soup.find_all('a', href=re.compile(r'/item/'))
          
          for link in links:
              new_url = link['href']
              new_full_url = parse.urljoin(parse_url, new_url)
              new_urls.add(new_full_url)
  
          return new_urls
  
      def _get_new_data(self, parse_url, soup):
          res_data = {}
  
          # url
          res_data['url'] = parse_url
  
          # <dd class="lemmaWgt-lemmaTitle-title"><h1>Python</h1>
          # 获取标题的标签
          title_node = soup.find('dd', class_='lemmaWgt-lemmaTitle-title').find('h1')
          res_data['title'] = title_node.get_text()
  
          #<div class="lemma-summary" label-module="lemmaSummary">
          summary_node = soup.find('div', class_='lemma-summary')
          res_data['summary'] = summary_node.get_text()
  
          return res_data
  
      def parse(self, parse_url, html_cont):
          if parse_url is None or html_cont is None:
              return
          soup = BeautifulSoup(html_cont, 'html.parser', from_encoding='utf-8')
          new_urls = self._get_new_urls(parse_url, soup)
          new_data = self._get_new_data(parse_url, soup)
  
          return new_urls, new_data
  
  
  # if __name__ == '__main__':
      # root_url = "https://baike.baidu.com/item/Python"
      # spider = Spider()
      # spider.craw(root_url)