网络爬虫基础练习

1.取出h1标签的文本

import requests
url = 'http://news.gzcc.cn/html/2018/xiaoyuanxinwen_0328/9113.html'
res = requests.get(url)
res.encoding='utf-8'
from bs4 import BeautifulSoup
soup = BeautifulSoup(res.text,'html.parser')
soup.h1.text

2.取出a标签的链接

soup.a.attrs.get('href')

3.取出所有li标签的所有内容

soup=BeautifulSoup(res.text,'html')
for i in soup.select('li'):
    print(i)

4.取出一条新闻的标题、链接、发布时间、来源

soup.select('.news-list-title')[0].text
soup.select('li')[1].a.attrs['href']
soup.select('.news-list-info')[0].contents[0].text
soup.select('.news-list-info')[0].contents[1].text