从极客学院首页爬几张图片：
一下为titita.txt内容，为极客学院首页源代码节选：
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爬图片的Python程序如下：
import re import requestsf=open('titita.txt','r') f1=f.read() f.close()htmls=re.findall('<img class="uptodate-img" src="(.*?)" alt="">',f1,re.S) i=0 for each in htmls:print('nowdoloading:'+each)pic=requests.get(each)fp=open('pic\\'+str(i)+'.jpg','wb')fp.write(pic.content)fp.closei+=1#之前没安装requests，要新建项目
Pycharm输出为：
nowdoloading:https://jiuye-res.jikexueyuan.com/zhiye/showcase/attach-/20170928/8cc3edeb-0115-43ea-a46f-db6c6e9255ca.jpg
nowdoloading:https://jiuye-res.jikexueyuan.com/zhiye/showcase/attach-/20171101/b12ae422-fd63-4b7d-a0d3-13c3ab4479c5.jpg
nowdoloading:https://jiuye-res.jikexueyuan.com/zhiye/showcase/attach-/20170928/85a3364e-47a3-41df-b5c8-daf48a57b7cd.jpg
nowdoloading:https://jiuye-res.jikexueyuan.com/zhiye/showcase/attach-/20171123/9625ede8-31e9-4edc-93e7-74bf5b752585.jpg
爬到的图片在资源管理器中显示为：
