python妹子图简单爬虫实例

#!/usr/bin/env python
#coding: utf-8
import urllib
import urllib2
import os
import re
import sys
#显示下载进度
def schedule(a,b,c):
 '''''
 a:已经下载的数据块
 b:数据块的大小
 c:远程文件的大小
 '''
 per = 100.0 * a * b / c
 if per > 100 :
 per = 100
 print '%.2f%%' % per
#获取html源码
def getHtml(url):
 page = urllib.urlopen(url)
 html = page.read()
 return html
#下载图片
def downloadImg(html, num, foldername):
 picpath = '%s' % (foldername) #下载到的本地目录
 if not os.path.exists(picpath): #路径不存在时创建一个
 os.makedirs(picpath)
 target = picpath+'/%s.jpg' % num
 myItems = re.findall('
',html,re.S)
 print 'Downloading image to location: ' + target
 urllib.urlretrieve(myItems[0], target, schedule)
#正则匹配分页
def findPage(html):
 myItems = re.findall('(d*)', html, re.S)
 return myItems.pop()
#正则匹配列表
def findList(html):
 myItems = re.findall('
.*?
', html, re.S)
 return myItems
#总下载
def totalDownload(modelUrl):
 listHtml5 = getHtml(modelUrl)
 listContent = findList(listHtml)
 for list in listContent:
 html = getHtml('http://www.mzitu.com/' + str(list[0]))
 totalNum = findPage(html)
 for num in range(1, int(totalNum)+1):
 if num == 1:
 url = 'http://www.mzitu.com/' + str(list[0])
 html5 = getHtml(url)
 downloadImg(html5, str(num), str(list[1]))
 else:
 url = 'http://www.mzitu.com/' + str(list[0]) + '/'+str(num)
 html5 = getHtml(url)
 downloadImg(html5, str(num), str(list[1]))
if __name__ == '__main__':
 listHtml = getHtml('http://www.mzitu.com/model')
 #这是其中一个模块的url，可以添加不同的模块url从而达到整站爬取。
 for model in range(1, int(findPage(listHtml))+1):
 if model == 1:
 modelUrl = 'http://www.mzitu.com/model'
 totalDownload(modelUrl)
 else:
 modelUrl = 'http://www.mzitu.com/model/page/' + str(model)
 totalDownload(modelUrl)
 print "Download has finished."