Python爬虫 —— 抓取美女图片

代码如下：

 1 #coding:utf-8
 2 # import datetime
 3 import requests
 4 import os
 5 import sys
 6 from lxml import etree
 7 import codecs
 8 
 9 class Spider:
10     def __init__(self):
11         self.headers = {}
12         self.headers['User_Agent'] = 'Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:60.0) Gecko/20100101 Firefox/60.0'
13         self.headers['Referer'] = 'http://www.mzitu.com/all/'
14 
15     def crawl(self, root_url):
16         html_text = requests.get(root_url,headers=self.headers).text
17         html_tree = etree.HTML(html_text)
18         groups = html_tree.xpath("//div[@class='main-content']//ul[@class='archives']//a")
19         count = 0
20         print "开始抓取："
21         for group in groups:
22             title = group.text
23             groupUrl = group.get('href')
24             print "正在抓取组图："+title
25             dirpath = self.makDir(title)   #获取标题，并以标题为名字创建文件夹
26             self.getGroup(groupUrl,dirpath)    #
27             count = count+1
28             if count>=5:
29                 print "抓取完成……"
30                 os._exit(0)
31 
32     def makDir(self,dirname):
33         dirpath = os.path.join(u'E:\学习资料',dirname)
34         if not os.path.exists(dirpath):
35             os.makedirs(dirpath)
36         return dirpath
37 
38     def getGroup(self,groupUrl,dirpath):
39         self.headers['Referer'] = groupUrl
40         html_text = requests.get(groupUrl, headers=self.headers).text
41         html_tree = etree.HTML(html_text)
42         maxPage = html_tree.xpath("//div[@class='pagenavi']//span")[-2].text    #获取改组图的张数
43         for page in range(1,int(maxPage)+1):    #获取每一张图的所在页面
44             pageUrl = groupUrl + '/' + str(page)    #拼接页面url
45             self.getPage(pageUrl,page,dirpath)   #访问该页面
46 
47     def getPage(self, pageUrl,page,dirpath):
48         self.headers['Referer'] = pageUrl
49         page_text = requests.get(pageUrl, headers=self.headers).text  #请求该图所在的页面
50         page_tree = etree.HTML(page_text)
51         imageurl = page_tree.xpath("//div[@class='main-image']//img")[0].get('src')    #获取图片url
52         image = requests.get(imageurl, headers=self.headers).content                    #请求获取图片
53         self.saveImage(image,page,dirpath)
54 
55     def saveImage(self,image,page,dirpath):
56         imagepath = os.path.join(dirpath, str(page) + u'.jpg')
57         file = codecs.open(imagepath, 'wb')
58         file.write(image)
59         file.close()
60 
61 if __name__ == '__main__':
62     reload(sys)
63     sys.setdefaultencoding('utf-8')
64     Mzitu = Spider()
65     Mzitu.crawl('http://www.mzitu.com/all')