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初次接触python，写的很简单，开发工具PyCharm，python 3.4很方便
python 部分模块安装时需要其他的附属模块之类的，可以先
pip install wheel
然后可以直接下载whl文件进行安装
pip install lxml-3.5.0-cp34-none-win32.whl
定义一个类，准备保存的类型
class CnblogArticle: def __init__(self): self.num=‘‘ self.category=‘‘ self.title=‘‘ self.author=‘‘ self.postTime=‘‘ self.articleComment=‘‘ self.articleView=‘‘
因为CSDN博客频道只有18页，所以解析18页，有多线程解析(main注释部分)及普通解析，在main方法里
注意事项:每个item以class=blog_list区分，部分item下有class=category，少部分没有，所有要注意，否则会报错
<div class="blog_list"> <h1> <a href="/other/index.html" class="category">[综合]</a> <a name="49786427" href="http://blog.csdn.net/matrix_space/article/details/49786427" target="_blank">Python: scikit-image canny 边缘检测</a> <img src="http://static.blog.csdn.net/images/icon-zhuanjia.gif" class="blog-icons" alt="专家" title="专家"> </h1> <dl> <dt> <a href="http://blog.csdn.net/matrix_space" target="_blank"> <img src="http://avatar.csdn.net/F/9/7/3_shinian1987.jpg" alt="shinian1987" /> </a> </dt> <dd>这个用例说明canny 边缘检测的用法 import numpy as np import matplotlib.pyplot as plt from scipy import ndimage as ndi from skimage import feature # Generate noisy image of a square im = np.zeros((128, 128)) im[3...</dd> </dl> <p> <a class="tag" href="/tag/details.html?tag=python" target="_blank">python</a> </p> <div class="about_info"> <span class="fr digg" id="digg_49786427" blog="1164951" digg="0" bury="0"></span> <span class="fl"> <a href="http://blog.csdn.net/matrix_space" target="_blank" class="user_name">shinian1987</a> <span class="time">3小时前</span> <a href="http://blog.csdn.net/matrix_space/article/details/49786427" target="_blank" class="view">阅读(104)</a> <a href="http://blog.csdn.net/matrix_space/article/details/49786427#comments" target="_blank" class="comment">评论(0)</a> </span> </div> </div>
<div class="blog_list"> <h1> <a name="50524490" href="http://blog.csdn.net/u010579068/article/details/50524490" target="_blank">STL_算法 for_each 和 transform 比较</a> </h1> <dl> <dt> <a href="http://blog.csdn.net/u010579068" target="_blank"> <img src="http://avatar.csdn.net/9/9/B/3_u010579068.jpg" alt="u010579068" /> </a> </dt> <dd>C++ Primer 学习中。。。   简单记录下我的学习过程 (代码为主) 所有容器适用 /**---------------------------------------------------------------------------------- for_each                    速度快              ...</dd> </dl> <p> <a class="tag" href="/tag/details.html?tag=STL_算法" target="_blank">STL_算法</a> <a class="tag" href="/tag/details.html?tag=for_each" target="_blank">for_each</a> <a class="tag" href="/tag/details.html?tag=transform" target="_blank">transform</a> <a class="tag" href="/tag/details.html?tag=STL" target="_blank">STL</a> </p> <div class="about_info"> <span class="fr digg" id="digg_50524490" blog="1499803" digg="0" bury="0"></span> <span class="fl"> <a href="http://blog.csdn.net/u010579068" target="_blank" class="user_name">u010579068</a> <span class="time">3小时前</span> <a href="http://blog.csdn.net/u010579068/article/details/50524490" target="_blank" class="view">阅读(149)</a> <a href="http://blog.csdn.net/u010579068/article/details/50524490#comments" target="_blank" class="comment">评论(0)</a> </span> </div> </div>
# -*- coding:utf-8 -*- from bs4 import BeautifulSoup import urllib.request import os import sys import time import threading class CnblogUtils(object): def __init__(self): self.headers={‘User-Agent‘:‘Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/46.0.2490.86 Safari/537.36‘} self.contentAll=set() def getPage(self,url=None): request=urllib.request.Request(url,headers=self.headers) response=urllib.request.urlopen(request) soup=BeautifulSoup(response.read(),"lxml") return soup def parsePage(self,url=None,page_num=None): soup=self.getPage(url) itemBlog=soup.find_all(‘div‘,‘blog_list‘) cnArticle=CnblogUtils for i,itemSingle in enumerate(itemBlog): cnArticle.num=i cnArticle.author=itemSingle.find(‘a‘,‘user_name‘).string cnArticle.postTime=itemSingle.find(‘span‘,‘time‘).string cnArticle.articleComment=itemSingle.find(‘a‘,‘comment‘).string cnArticle.articleView=itemSingle.find(‘a‘,‘view‘).string if itemSingle.find(‘a‘).has_attr(‘class‘): cnArticle.category=itemSingle.find(‘a‘,‘category‘).string cnArticle.title=itemSingle.find(‘a‘,attrs={‘name‘:True}).string else: cnArticle.category="None" cnArticle.title=itemSingle.find(‘a‘).string self.contentAll.add(str(cnArticle.author)) self.writeFile(page_num,cnArticle.num,cnArticle.author,cnArticle.postTime,cnArticle.articleComment,cnArticle.articleView,cnArticle.category,cnArticle.title) def writeFile(self,page_num,num,author,postTime,articleComment,articleView,category,title): f=open("a.txt",‘a+‘) f.write(str(‘page_num is {}‘.format(page_num))+‘\t‘+str(num)+‘\t‘+str(author)+‘\t‘+str(postTime)+‘\t‘+str(articleComment)+‘\t‘+str(articleView)+‘\t‘+str(category)+‘\t‘+str(title)+‘\n‘) f.close() def main(thread_num): start=time.clock() cnblog=CnblogUtils() ‘‘‘ thread_list = list(); for i in range(0, thread_num): thread_list.append(threading.Thread(target = cnblog.parsePage, args = (‘http://blog.csdn.net/?&page={}‘.format(i),i+1,))) for thread in thread_list: thread.start() for thread in thread_list: thread.join() print(cnblog.contentAll) ‘‘‘ for i in range(0,18): cnblog.parsePage(‘http://blog.csdn.net/?&page={}‘.format(i),i+1) end=time.clock() print(‘time = {}‘.format(end-start)) if __name__ == ‘__main__‘: main(18)
程序运行结果:
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网速不好时多线程可能报错
获取了数据了就可以进行数据分析，或者深度搜索，根据author去获取author对应的blog等
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原文地址：http://www.cnblogs.com/comkingfly/p/5134001.html
