python抓取网页图片示例(python爬虫)

使用python抓取网页图片的示例(python网络爬虫)。

代码：

#-*- encoding: utf-8 -*-

'''

Created on 2014-4-24

@author: Leon Wong

'''

import urllib2

import urllib

import re

import time

import os

import uuid

#获取二级页面url

def findUrl2(html):

re1 = r'http://tuchong.com/\d+/\d+/|http://\w+(?<!photos).tuchong.com/\d+/'

url2list = re.findall(re1,html)

url2lstfltr = list(set(url2list))

url2lstfltr.sort(key=url2list.index)

#print url2lstfltr

return url2lstfltr

#获取html文本

def getHtml(url):

html = urllib2.urlopen(url).read().decode('utf-8')#解码为utf-8

return html

#下载图片到本地

def download(html_page , pageNo): 

#定义文件夹的名字

x = time.localtime(time.time())

foldername = str(x.__getattribute__("tm_year"))+"-"+str(x.__getattribute__("tm_mon"))+"-"+str(x.__getattribute__("tm_mday"))

re2=r'http://photos.tuchong.com/.+/f/.+\.jpg'

imglist=re.findall(re2,html_page)

print imglist

download_img=None

for imgurl in imglist:

picpath = 'D:\\TuChong\\%s\\%s' % (foldername,str(pageNo))

filename = str(uuid.uuid1())

if not os.path.exists(picpath):

os.makedirs(picpath) 

target = picpath+"\\%s.jpg" % filename

print "The photos location is:"+target

download_img = urllib.urlretrieve(imgurl, target)#将图片下载到指定路径中

time.sleep(1)

print(imgurl)

return download_img



# def callback(blocknum, blocksize, totalsize):

# '''回调函数 www.jbxue.com

# @blocknum: 已经下载的数据块

# @blocksize: 数据块的大小

# @totalsize: 远程文件的大小

# '''

# print str(blocknum),str(blocksize),str(totalsize)

# if blocknum * blocksize >= totalsize:

# print '下载完成'

def quitit():

print "Bye!"

exit(0)



if __name__ == '__main__':

print ''' *****************************************

** Welcome to Spider for TUCHONG **

** Created on 2014-4-24 **

** @author: Leon Wong **

*****************************************'''

pageNo = raw_input("Input the page number you want to scratch (1-100),please input 'quit' if you want to quit>")

while not pageNo.isdigit() or int(pageNo) > 100 :

if pageNo == 'quit':quitit()

print "Param is invalid , please try again."

pageNo = raw_input("Input the page number you want to scratch >")



#针对图虫人像模块来爬取

html = getHtml("http://tuchong.com/tags/%E4%BA%BA%E5%83%8F/?page="+str(pageNo))



detllst = findUrl2(html)

for detail in detllst:

html2 = getHtml(detail)

download(html2,pageNo)

print "Finished."