前言
拿来练手的,比较简单(且有bug),欢迎交流~
功能介绍
抓取当日的知乎日报的内容,并将每篇博文另存为一个txt文件,集中放在一个文件夹下,文件夹名字为当日时间。
使用的库
re,BeautifulSoup,sys,urllib2
注意事项
1.运行环境是Linux,python2.7.x,想在win上使用直接改一下里边的命令就可以了
2.bug是在处理 “如何正确吐槽”的时候只能获取第一个(懒癌发作了)
3.直接获取(如下)内容是不可以的,知乎做了反抓取的处理
urllib2.urlop(url).read()
所以加个Headers就可以了
1 def getHtml(url): 2 header={‘User-Agent‘ : ‘Mozilla/5.0 (Windows NT 6.1; WOW64; rv:14.0) Gecko/20100101 Firefox/14.0.1‘,‘Referer‘ : ‘******‘} 3 request=urllib2.Request(url,None,header) 4 response=urllib2.urlopen(request) 5 text=response.read() 6 return text
4.在做内容分析的时候可以直接使用re,也可以直接调用BeautifulSoup里的函数(我对正则表达式发怵,所以直接bs),比如
1 def saveText(text): 2 soup=BeautifulSoup(text) 3 filename=soup.h2.get_text()+".txt" 4 fp=file(filename,‘w‘) 5 content=soup.find(‘div‘,"content") 6 content=content.get_text()
show me the code
1 #Filename:getZhihu.py 2 import re 3 import urllib2 4 from bs4 import BeautifulSoup 5 import sys 6 7 reload(sys) 8 sys.setdefaultencoding("utf-8") 9 10 #get the html code 11 def getHtml(url): 12 header={‘User-Agent‘ : ‘Mozilla/5.0 (Windows NT 6.1; WOW64; rv:14.0) Gecko/20100101 Firefox/14.0.1‘,‘Referer‘ : ‘******‘} 13 request=urllib2.Request(url,None,header) 14 response=urllib2.urlopen(request) 15 text=response.read() 16 return text 17 #save the content in txt files 18 def saveText(text): 19 soup=BeautifulSoup(text) 20 filename=soup.h2.get_text()+".txt" 21 fp=file(filename,‘w‘) 22 content=soup.find(‘div‘,"content") 23 content=content.get_text() 24 25 # print content #test 26 fp.write(content) 27 fp.close() 28 #get the urls from the zhihudaily.ahorn.com 29 def getUrl(url): 30 html=getHtml(url) 31 # print html 32 soup=BeautifulSoup(html) 33 urls_page=soup.find(‘div‘,"post-body") 34 # print urls_page 35 36 urls=re.findall(‘"((http)://.*?)"‘,str(urls_page)) 37 return urls 38 #main() founction 39 def main(): 40 page="http://zhihudaily.ahorn.me" 41 urls=getUrl(page) 42 for url in urls: 43 text=getHtml(url[0]) 44 saveText(text) 45 46 if __name__=="__main__": 47 main()
时间: 2024-10-08 15:00:33