爬取校园新闻首页的新闻
1. 用requests库和BeautifulSoup库,爬取校园新闻首页新闻的标题、链接、正文。
import requests from bs4 import BeautifulSoup url='http://news.gzcc.cn/html/xiaoyuanxinwen/' res=requests.get(url) res.encoding='utf-8' soup = BeautifulSoup(res.text,'html.parser') for news in soup.select('li'): if len(news.select('.news-list-title'))>0: t=news.select('.news-list-title')[0].text dt=news.select('.news-list-info')[0].contents[0].text a=news.select('a')[0].attrs['href'] print(dt,t,a)
2. 分析字符串,获取每篇新闻的发布时间,作者,来源,摄影等信息。
for news in soup.select('li'): if len(news.select('.news-list-title'))>0: title = news.select('.news-list-title')[0].text a = news.select('a')[0].attrs['href'] resd = requests.get(a) resd.encoding = 'utf-8' soupd = BeautifulSoup(resd.text, 'html.parser') d = soupd.select('#content')[0].text info = soupd.select('.show.info')[0].text print(info) dt = info.lstrip('发布时间:')[:19]#发布时间 dt2 = datetime.strptime(dt, '%Y-%m-%d %H:%M:%S') print(dt2) i = info.find('来源:') if i>0: s = info[info.find('来源:'):].split()[0].lstrip('来源:')#来源 print(s) a = info.find('作者:') if a > 0: l = info[info.find('作者:'):].split()[0].replace('作者:')#作者 print(l) y = info.find('摄影:') if y > 0: u = info[info.find('摄影:'):].split()[0].replace('摄影:')#摄影 print(u)
3. 将其中的发布时间由str转换成datetime类型。
from datetime import datetime str = '2018-03-30 17:10:12 ' dt=datetime.strptime('str,%Y-%a-%d %H:%M:%S') now = datetime.now() type(now) now.strptime('%Y-%a-%d %H:%M:%S')