Scrapy by requests & bs4

#!/usr/bin/env python# -*- coding: utf-8 -*-import timeimport requestsfrom bs4 import BeautifulSoupstart = time.clock()url = 'http://news.sina.com.cn/china/'res = requests.get(url)res.encoding = 'utf-8'soup = BeautifulSoup(res.text, 'html.parser')for news in soup.select('.news-item'):    if len(news.select('h2')) > 0:        h2 = news.select('h2')[0].text        tm = news.select('.time')[0].text        href = news.select('a')[0]['href']        print(h2, tm, href)usetime = time.clock()-startprint('用时{}秒'.format(usetime))