Python实现批量下载图片的方法

本文实例讲述了Python实现批量下载图片的方法。分享给大家供大家参考。具体实现方法如下：

    #!/usr/bin/env python
    #-*-coding:utf-8-*-'
    #Filename:download_file.py
    import os,sys
    import re
    import urllib
    import urllib2
    base_url = 'xxx'
    array_url = list()
    pic_url = list()
    inner_url = list()
    def get_array_url(array_url,base_url):
      content = urllib.urlopen(base_url).read()
      array_url_a = re.findall(r'/rihan.*?.html',content)
      for url in array_url_a:
        url_a = 'xxx'+url
        #print url_a
        array_url.append(url_a)
    def get_inner_url(array_url,inner_url):
      inner_url.append(array_url)
      content = urllib.urlopen(array_url[10]).read()
      content = content.replace(" ","")
      url_a = re.findall(r'<li>.*?</li>',content)
      for i in url_a:
        url = re.findall(r'ahref=\\'.*?.html\\'target',i)
        if len(url)>0:
          # print url[0]
          url_b = re.sub(r'ahref=\\'','',url[0])
          # print url_b
          url_c = re.sub(r'\\'target','',url_b)
          url_c = 'http://xxx/'+re.sub(r'/.*/','',url_c)
          inner_url.append(url_c)
      del inner_url[1]
      # print inner_url
    def get_pic_url(pic_url,inner_url,array_url):
      content = urllib.urlopen(array_url).read()
      pic_url_a = re.findall(r'center.*?.jpg',content)
      print 'bbbbbbbbb',len(pic_url_a)
      pic_url_a = re.findall(r'http://.*.jpg',pic_url_a[0])
      pic_url.append(pic_url_a[0])
      j=2
      for i in inner_url:
        jj = '/'+str(j)+'.jpg'
        pic = re.sub(r'/1.jpg',jj,pic_url_a[0])
        pic_url.append(pic)
        j = j+1
      del pic_url[-1]
      for i in pic_url:
        print i
    def urlcallback(a,b,c):
      """
        call back function
        a,已下载的数据块
        b,数据块的大小
        c,远程文件的大小
      """
      print "callback"
      prec=100.0*a*b/c
      if 100 < prec:
        prec=100
      print "%.2f%%"%(prec,)
    def download(img_url,file_num):
        for img in img_url:
          print img
          img_name = re.sub(r'http://.*/','',img)
          path = 'C:/'+str(file_num)+'/'+img_name
          urllib.urlretrieve(img,path,urlcallback)
    get_array_url(array_url,base_url)
    file_num = 3
    #download(pic_url,file_num)
    get_inner_url(url,inner_url)
    get_pic_url(pic_url,inner_url,url)
    '''
    for url in array_url:
      print url
      # get_inner_url(url,inner_url)
     # get_pic_url(pic_url,inner_url)
      get_inner_url(url,inner_url)
      get_pic_url(pic_url,inner_url,url)
      download(pic_url,file_num)
      file_num = file_num+1
      del inner_url[:]
      del pic_url[:]
    '''

希望本文所述对大家的Python程序设计有所帮助。