需要一个chrome浏览器插件，https://chrome.google.com/webstore/detail/infolite/ipjbadabbpedegielkhgpiekdlmfpgal，安装好后打开，可以看到网页块域的类名称

import requestsfrom bs4 import BeautifulSoupres = requests.get('http://news.sina.com.cn/china/')res.encoding = 'utf-8'soup = BeautifulSoup(res.text,'html.parser')for news in soup.select('.news-item'):    if len(news.select('h2')) > 0:        time = news.select('.time')[0].text        h2 = news.select('h2')[0].text        a = news.select('a')[0]['href']        print(time,h2,a)

结果：