爬取全部的校园新闻
2019-04-09 15:53 科ke 阅读(159) 评论(0) 编辑 收藏 举报1.从新闻url获取新闻详情: 字典,anews
2.从列表页的url获取新闻url:列表append(字典) alist
3.生成所页列表页的url并获取全部新闻 :列表extend(列表) allnews
*每个同学爬学号尾数开始的10个列表页
4.设置合理的爬取间隔
import time
import random
time.sleep(random.random()*3)
5.用pandas做简单的数据处理并保存
保存到csv或excel文件
newsdf.to_csv(r'F:\duym\爬虫\gzccnews.csv')
保存到数据库
import sqlite3
with sqlite3.connect('gzccnewsdb.sqlite') as db:
newsdf.to_sql('gzccnewsdb',db)
import requests from bs4 import BeautifulSoup from datetime import datetime import re def anews(url): newsDetail={} res=requests.get(url) res.encoding='utf-8' soup=BeautifulSoup(res.text,'html.parser') newsDetail['nenewsTitle']=soup.select('.show-title')[0].text showinfo=soup.select('.show-info')[0].text newsDetail['newsDT']=newsdt(showinfo) newsDetail['newsClick']=click(newsUrl) return newsDetail def click(url): id=re.findall('(\d{1,5})',url)[-1] clickUrl='http://oa.gzcc.cn/api.php?op=count&id={}&modelid=80'.format(id) resClick=requests.get(clickUrl) newsClick=int(resClick.text.split('.html')[-1].lstrip("('").rstrip("');")) return newsClick def newsdt(showinfo): newsDate=showinfo.split()[0].split(":")[1] newsTime=showinfo.split()[1] newsDT=newsDate+' '+newsTime dt=datetime.strptime(newsDT,'%Y-%m-%d %H:%M:%S') return dt def anewsDate(url): newsDetail={} res=requests.get(url) res.encoding='utf-8' soup=BeautifulSoup(res.text,'html.parser') newsDetail['nenewsTitle']=soup.select('.show-title')[0].text showinfo=soup.select('.show-info')[0].text newsDetail['newsDT']=newsdt(showinfo) newsDetail['newsClick']=click(newsUrl) return newsDetail newsUrl='http://news.gzcc.cn/html/2005/xiaoyuanxinwen_0710/4.html' anewsDate(newsUrl) res = requests.get('http://news.gzcc.cn/html/xiaoyuanxinwen/') res.encoding='utf-8' soup = BeautifulSoup(res.text,'html.parser') for news in soup.select('li'): if len(news.select('.news-list-title'))>0: newsUrl=news.select('a')[0]['href'] print(anews(newsUrl)) listUrl='http://news.gzcc.cn/html/xiaoyuanxinwen/' res=requests.get(listUrl) res.encoding='utf-8' soup = BeautifulSoup(res.text,'html.parser') newsList=[] for news in soup.select('li'): if len(news.select('.news-list-title'))>0: newsUrl=news.select('a')[0]['href'] newsDesc=news.select('.news-list-description')[0].text newsDict=anews(newsUrl) newsDict['description']=newsDesc newsList.append(newsDict) def alist(url): res=requests.get(listUrl) res.encoding='utf-8' soup = BeautifulSoup(res.text,'html.parser') newsList=[] for news in soup.select('li'): if len(news.select('.news-list-title'))>0: newsUrl=news.select('a')[0]['href'] newsDesc=news.select('.news-list-description')[0].text newsDict=anews(newsUrl) newsDict['description']=newsDesc newsList.append(newsDict) return newsList listUrl='http://news.gzcc.cn/html/xiaoyuanxinwen/' alist(listUrl) allnews=[] for i in range(90,100): listUrl='http://news.gzcc.cn/html/xiaoyuanxinwen/{}.html'.format(i) allnews.extend(alist(listUrl)) print(allnews) len(allnews)