爬去内容： 图片地址，下载文档中的图片到指定文件夹中
实现原理：
1、保存网页源代码
2、Python 读文件加载源代码
3、正则表达式提取图片地址
4、下载图片
源文件
# _*_ conding:utf-8 _*_
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<li><img src="http://jiuye-res.jikexueyuan.com/others/20170724/bc5087ba-9bd9-422e-9084-39a492830d7e.png" alt="??????????????Python???γ??120???????н8000??"><p><a href="http://daniu.jikexueyuan.com/web-offline/py/?utm_source=jikexueyuan&utm_medium=www&utm_campaign=index&utm_content=banner&utm_term=right_news" target="_blank">??????????????Python???γ??120???????н8000??</a></p></li>
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<li><img src="http://jiuye-res.jikexueyuan.com/others/20171027/4ff72412-2aa4-4071-ab9d-829a1fdbde8f.png" alt="?????-Python????????"><p><a href="http://ad.jikexueyuan.com/v1/code_slot/17/creative/96/redirect?delivery_ad_id=80&_t=1509850511" target="_blank">Python????????????????????120???????</p></a></li>
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<a href="//www.jikexueyuan.com/course/cordova/" cgid="68">Cordova</a>
<a href="//www.jikexueyuan.com/course/reactnative1/" cgid="382">React Native</a>
</dd>
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<a href="//www.jikexueyuan.com/course/pythonbase/" cgid="147">Python ????</a>
<a href="//www.jikexueyuan.com/course/web2py/" cgid="148">web2py</a>
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<a href="//www.jikexueyuan.com/course/gui/" cgid="393">GUI</a>
<a href="//www.jikexueyuan.com/course/datamininganalysis/" cgid="394">????????????</a>
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<dt><a href="//www.jikexueyuan.com/course/php/" cgid="21">PHP</a></dt>
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<a href="//www.jikexueyuan.com/course/phpbase/" cgid="123">PHP ????</a>
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<a href="//www.jikexueyuan.com/course/phalcon/" cgid="131">Phalcon</a>
<a href="//www.jikexueyuan.com/course/apachedev/" cgid="135">Apache</a>
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</dd>
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<dt><a href="//www.jikexueyuan.com/course/nodedotjs/" cgid="26">Node.js</a></dt>
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<dt><a href="//www.jikexueyuan.com/course/aspdotnet/" cgid="22">ASP.NET</a></dt>
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<a href="//www.jikexueyuan.com/course/figure/" cgid="179">?????</a>
<a href="//www.jikexueyuan.com/course/model/" cgid="180">?????</a>
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<a href="//www.jikexueyuan.com/course/svn/" cgid="184">SVN</a>
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"num">68/28452</span></a></li>
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源文件
源代码
import re,requests
#读取文件
with open(‘ts.txt‘,‘r‘,encoding=‘utf-8‘) as f:
html=f.read()
f.close()
# 匹配图片地址
pic_url=re.findall(r‘<img class="uptodate-img" src="(.*?)"‘,html,re.S)
i=0
for each in pic_url:
print(‘现在开始下载第%s张‘%i)
pic=requests.get(each)
fp=open(‘picture\\‘+str(i)+‘.png‘,‘wb‘)
fp.write(pic.content)
fp.close()
i+=1
时间： 2024-10-12 19:56:43