####基本配置：
- Python版本：3.4
- 开发工具：pycharm
####相关模块：
from bs4 import BeautifulSoup
import urllib.request
import os
import sys
import time
import threading
####说明：
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>
Beautiful Soup 4.2.0 文档 可以去官网直接查看
# -*- coding:utf-8 -*-
from bs4 import BeautifulSoup
import urllib.request
import os
import sys
import time
import threading
'''
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'''
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)
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