用requests库和BeautifulSoup4库爬取新闻列表

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

import requests
from bs4 import BeautifulSoup

gzccurl = 'http://news.gzcc.cn/html/xiaoyuanxinwen/'
res = requests.get(gzccurl)
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 #标题
        url = news.select('a')[0]['href'] #路径
        time = news.select('.news-list-info')[0].contents[0].text #时间
        source = news.select('.news-list-info')[0].contents[1].text #来源
        #正文
        resd = requests.get(url)
        resd.encoding='utf-8'
        soupd = BeautifulSoup(resd.text,'html.parser')
        detail = soupd.select('.show-content')[0].text
        print(time,title,url,source)
        print(detail)
        break

2、将其中的时间str转换成datetime类型

import requests
from bs4 import BeautifulSoup
from datetime import datetime

gzccurl = 'http://news.gzcc.cn/html/xiaoyuanxinwen/'
res = requests.get(gzccurl)
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 #标题
        url = news.select('a')[0]['href'] #路径
        time = news.select('.news-list-info')[0].contents[0].text #时间
        dt = datetime.strptime(time,'%Y-%m-%d')
        source = news.select('.news-list-info')[0].contents[1].text #来源
        #正文
        resd = requests.get(url)
        resd.encoding='utf-8'
        soupd = BeautifulSoup(resd.text,'html.parser')
        detail = soupd.select('.show-content')[0].text
        print(dt,title,url,source)
        print(detail)
        break

 

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

gzccurl = 'http://news.gzcc.cn/html/xiaoyuanxinwen/'
res = requests.get(gzccurl)
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 #标题
        url = news.select('a')[0]['href'] #路径
        time = news.select('.news-list-info')[0].contents[0].text #时间
        dt = datetime.strptime(time,'%Y-%m-%d')
        source = news.select('.news-list-info')[0].contents[1].text #来源
        #正文
        detail =  getdetail(url)
        print(dt,title,url,source)
        print(detail)
        break

 

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

import requests
from bs4 import BeautifulSoup
from datetime import datetime

gzccurl = 'http://news.gzcc.cn/html/meitishijie/'
res = requests.get(gzccurl)
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 #标题
        url = news.select('a')[0]['href'] #路径
        time = news.select('.news-list-info')[0].contents[0].text #时间
        dt = datetime.strptime(time,'%Y-%m-%d')
        #正文
        detail =  getdetail(url)
        print(dt,title,url,detail)
        break

 

posted on 2017-09-28 18:16  ZJQ-013  阅读(440)  评论(0编辑  收藏  举报