[Python学习] 简单网络爬虫抓取博客文章及思想介绍
来源:互联网 发布:参加淘宝培训班有用吗 编辑:程序博客网 时间:2024/05/16 14:13
原文链接:http://www.2cto.com/kf/201410/340479.html
它的具体html源代码如下:
所以我们只需要获取每页中博客
import
urllib
content = urllib.urlopen(
"http://blog.csdn.nethttp://blog.csdn.net/eastmount/article/details/39599061"
).read()
open(
'test.html'
,
'w+'
).write(content)
但是CSDN会禁止这样的行为,服务器禁止爬取站点内容到别人的网上去.我们的博客文章经常被其他网站爬取,但并没有申明原创出处,还请尊重原创.它显示的错误"403 Forbidden".
PS:据说模拟正常上网能实现爬取CSDN内容,读者可以自己去研究,作者此处不介绍.参考(已验证):
http://blog.csdn.net/eastmount/article/details/http://www.yihaomen.com/article/python/210.htmhttp://blog.csdn.net/eastmount/article/details/
http://www.2cto.com/kf/201405/304829.htmlhttp://blog.csdn.net/eastmount/article/details/
第二步 获取自己所有的文章
这里只讨论思想,假设我们第一篇文章已经获取成功.下面使用Python的find()从上一个获取成功的位置继续查找下一篇文章链接,即可实现获取第一页的所有文章.它一页显示的是20篇文章,最后一页显示剩下的文章.
那么如何获取其他页的文章呢?http://blog.csdn.net/eastmount/article/details/
我们可以发现当跳转到不同页时显示的超链接为:http://blog.csdn.net/eastmount/article/details/
第
1
页 http:
//blog.csdn.net/Eastmount/article/list/1
第
2
页 http:
//blog.csdn.net/Eastmount/article/list/2
第
3
页 http:
//blog.csdn.net/Eastmount/article/list/3
第
4
页 http:
//blog.csdn.net/Eastmount/article/list/4
这思想就非常简单了,其过程简单如下:
for(int i=0;i<4;i++) //获取所有页文章
for(int j=0;j<20;j++) //获取一页文章 注意最后一页文章篇数
GetContent(); //获取一篇文章 主要是获取超链接http://blog.csdn.net/eastmount/article/details/
同时学习过通过正则表达式,在获取网页内容图片过程中格外方便.如我前面使用C#和正则表达式获取图片的文章:http://blog.csdn.net/eastmount/article/details/12235521http://blog.csdn.net/eastmount/article/details/
二.爬取新浪博客http://blog.csdn.net/eastmount/article/details/http://blog.csdn.net/eastmount/article/details/
上面介绍了爬虫的简单思想,但是由于一些网站服务器禁止获取站点内容,但是新浪一些博客还能实现.这里参照"51CTO学院 智普教育的python视频"获取新浪韩寒的所有博客.
地址为:http://blog.sina.com.cn/s/articlelist_1191258123_0_1.html
采用同上面一样的方式我们可以获取每个
此时通过Python获取一篇文章的代码如下:http://blog.csdn.net/eastmount/article/details/http://blog.csdn.net/eastmount/article/details/
import
urllib
content = urllib.urlopen(
"http://blog.sina.com.cn/s/blog_4701280b0102eo83.html"
).read()
open(
'blog.html'
,
'w+'
).write(content)
可以显示获取的文章,现在需要获取一篇文章的超链接,即:
《论电影的七个元素》——关于我对电…
在没有讲述正则表达式之前使用Python人工获取超链接http,从文章开头查找第一个"<a title",然后接着找到"href="和" .html"即可获取"http:="" blog.sina.com.cn="" s="" blog_4701280b0102eo83.html".代码如下:http:="" blog.csdn.net="" eastmount="" article="" details="" <="" strong="">
#..
#coding:utf-
8
con = urllib.urlopen(
"http://blog.sina.com.cn/s/articlelist_1191258123_0_1.html"
).read()
title = con.find(r'
<p><strong> 下面按照前面讲述的思想通过两层循环即可实现获取所有文章,具体代码如下:http:
//blog.csdn.net/eastmount/article/details/</strong></p>
<pre
class
=
" brush:java;"
=
""
>#coding:utf-
8
import
urllib
import
time
page=
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while
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url=[
''
]*
50
#新浪播客每页显示
50
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temp=
'http://blog.sina.com.cn/s/articlelist_1191258123_0_'
+str(page)+
'.html'
con =urllib.urlopen(temp).read()
#初始化
i=
0
title=con.find(r'下载获取文章
j=
0
while
(j<i): #前面
6
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50
篇=
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最后一页为i篇=
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else
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print=
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>
<p><strong> 这样我们就把韩寒的
316
篇新浪博客文章全部爬取成功并能显示每一篇文章,显示如下:<br>
http:
//blog.csdn.net/eastmount/article/details/</strong><img width="640" height="300" alt="\" src="http://www.2cto.com/uploadfile/Collfiles/20141005/20141005085306131.jpg"><br>
<strong> 这篇文章主要是简单的介绍了如何使用Python实现爬取网络数据,后面我还将学习一些智能的数据挖掘知识和Python的运用,实现更高效的爬取及获取客户意图和兴趣方面的知识.想实现智能的爬取图片和小说两个软件.<br>
该文章仅提供思想,希望大家尊重别人的原创成果,不要随意爬取别人的文章并没有含原创作者信息的转载!最后希望文章对大家有所帮助,初学Python,如果有错误或不足之处,请海涵!<br>
(By:Eastmount
2014
-
9
-
28
中午
11
点 原创CSDN http:
//blog.csdn.net/eastmount/)<br>
参考资料:<br>
1
.51CTO学院 智普教育的python视频http:
//blog.csdn.net/eastmount/article/details/</strong><strong>http://edu.51cto.com/course/course_id-581.htmlhttp://blog.csdn.net/eastmount/article/details/</strong><br>
<strong>
2
.《Web数据挖掘》刘兵著http:
//blog.csdn.net/eastmount/article/details/</strong></p>
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