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。
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)