本次作业的要求来源于:https://edu.cnblogs.com/campus/gzcc/GZCC-16SE1/homework/3002
0.从新闻url获取点击次数,并整理成函数
- newsUrl
- newsId(re.search())
- clickUrl(str.format())
- requests.get(clickUrl)
- re.search()/.split()
- str.lstrip(),str.rstrip()
- int
- 整理成函数
- 运行代码:
import requests
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
- 运行截图:
- 获取新闻发布时间及类型转换也整理成函数
- 运行代码:
from datetime import datetime
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
1.从新闻url获取新闻详情: 字典,anews
- 运行代码:
def anews(url): newsDetail={} res=requests.get(url) res.encoding='utf-8' soup=BeautifulSoup(res.text,'html.parser') newsDetail['newstitle']=soup.select('.show-title')[0].text showinfo = soup.select('.show-info')[0].text newsDetail['newsDt'] = newsdt(showinfo) newsDetail['newsClick'] =click(url) return newsDetail
- 运行截图:
2.从列表页的url获取新闻url:列表append(字典) alist
- 运行代码:
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['newsUrl']=newsUrl newsDict['description'] = newsDesc newsList.append(newsDict) return newsList
- 运行截图:
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)
- 运行代码:
listUrl = "http://news.gzcc.cn/html/xiaoyuanxinwen/" allnews = alist(listUrl) for i in range(21, 30): listUrl = "http://news.gzcc.cn/html/xiaoyuanxinwen/{}.html".format(i) allnews.extend(alist(listUrl))
- 运行截图:
4.设置合理的爬取间隔
import time
import random
time.sleep(random.random()*3)
- 运行代码:
import time import random for i in range(1, 5): time.sleep(random.random() * 3) # 休眠随机数的3倍时间 print(allnews)
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')
- 运行代码:
import pandas newsdf=pd.DataFrame(allnews) newsdf.to_csv(r'F:\zyx\news.csv')
- 运行截图: