用requests库和BeautifulSoup4库爬取新闻列表

Posted 2020-10-08 少钏_leo

1：用requests库和BeautifulSoup4库，爬取校园新闻列表的时间、标题、链接、来源。

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:
        title=news.select(\'.news-list-title\')[0].text
        time=news.select(\'.news-list-info\')[0].contents[0].text
        url=news.select(\'a\')[0][\'href\']
        thumb=news.select(\'.news-list-thumb\')[0].contents[0]
        print(time)
        print(title)
        print(url)
        print(thumb)

 

2.将其中的时间str转换成datetime类型

import requests
from bs4 import BeautifulSoup
from datetime import datetime

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:
        title=news.select(\'.news-list-title\')[0].text
        time=news.select(\'.news-list-info\')[0].contents[0].text
        url=news.select(\'a\')[0][\'href\']
        thumb=news.select(\'.news-list-thumb\')[0].contents[0]
        print(time)
        print(title)
        print(url)
        print(thumb)

3.将取得详细内容的代码包装成函数

import requests
from bs4 import BeautifulSoup
from datetime import datetime

url=\'http://news.gzcc.cn/html/xiaoyuanxinwen/\'

res=requests.get(url)
res.encoding=\'utf-8\'
   
soup=BeautifulSoup(res.text,\'html.parser\')


def getdetail(url):
    resd = requests.get(url)
    resd.encoding=\'utf-8\'
    soupd = BeautifulSoup(resd.text,\'html.parser\')
    return soupd.select(\'.show-content\')[0].text

for news in soup.select(\'li\'):
    if len(news.select(\'.news-list-title\'))>0:
        title=news.select(\'.news-list-title\')[0].text
        time=news.select(\'.news-list-info\')[0].contents[0].text
        url=news.select(\'a\')[0][\'href\']
        thumb=news.select(\'.news-list-thumb\')[0].contents[0]
        print(time)
        print(title)
        print(url)
        print(thumb)

 

4.选一个自己感兴趣的主题，做类似的操作，为“爬取网络数据并进行文本分析”做准备

import requests
from bs4 import BeautifulSoup
jq=\'http://www.gamersky.com/\'
res = requests.get(jq)
res.encoding=\'utf-8\'
soup = BeautifulSoup(res.text,\'html.parser\')
 
for news in soup.select(\'li\'):
    if len(news.select(\'a\'))>0:
        title=news.select(\'a\')[0].text
        url=news.select(\'a\')[0][\'href\']
        #time=news.select(\'span\')[0].contents[0].text
        #print(time,title,url)
        print(title,url)