python保存网页图片到本地的方法

#!/usr/bin/env Python
#coding=utf-8 
 
import time
import datetime
import sys
import random
import math
import uuid
import cookielib
import urllib2
import os
 
class GetImage():
 reload(sys)
 sys.setdefaultencoding('utf8') 
 '''
 抓取网页文件内容，保存到内存
 
 @url 欲抓取文件 ，path+filename
 '''
 def get_file(self,url):
 try:
  cj=cookielib.LWPCookieJar()
  opener=urllib2.build_opener(urllib2.HTTPCookieProcessor(cj))
  urllib2.install_opener(opener)
   
  req=urllib2.Request(url)
  operate=opener.open(req)
  data=operate.read()
  return data
 except  Exception, e:
  print e
  return None
  
 '''
 保存文件到本地
 
 @path 本地路径
 @file_name 文件名
 @data 文件内容
 '''
 def save_file(self,file_name, data):
 if data == None:
  return
   
 
 file=open(file_name, "wb")
 file.write(data)
 file.flush()
 file.close()
 def save_png_file(self,filename,url):
 self.save_file(filename,self.get_file(url))
 
  
if __name__=="__main__":
 
  h1 = GetImage()
 
  #h1.save_file('c:/log/124.png',h1.get_file('http://1.1.1.1/doc/images/public/ICON/norecord.png'))
  #url = 'http://1.1.1.1/doc/images/public/ICON/norecord.png'
  #file_path ='c:/log/125.png'
  #h1.save_png_file(file_path,url)