爬取新闻

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')

1. 用requests库和BeautifulSoup库，爬取校园新闻首页新闻的标题、链接、正文。

for news in soup.select('li'):
    if len(news.select('.news-list-title'))>0:
        t=news.select('.news-list-title')[0].text #标题
        a=news.select('a')[0].attrs['href'] #链接
        res1=requests.get(a)
        res1.encoding='utf-8'
        soup1=BeautifulSoup(res1.text,'html.parser')
        d=soup1.select('#content')[0].text #正文
        print(t,a,d)

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:
        t=news.select('.news-list-title')[0].text #标题
        a=news.select('a')[0].attrs['href'] #链接
        res1=requests.get(a)
        res1.encoding='utf-8'
        soup1=BeautifulSoup(res1.text,'html.parser')
        info=soup1.select('.show-info')[0].text
        print(info)

3. 将其中的发布时间由str转换成datetime类型。

from datetime import datetime
str = '2018-04-02 17:10:12 '
datetime.strptime(str,'%Y-%m-%d %H:%M:%S ')
print('
',str)