python獲取某網址下所有圖片

import urllib
import urllib.request
import re

def get_save(url,picname):
             response=urllib.request.urlopen(url)
             data=response.read()
             f=open(picname,'wb')
             f.write(data)
             f.close()
def get_all_picurl(url):
             #write the html to file
             response=urllib.request.urlopen(url)
             data=response.read()
             f=open('C:\\xx.txt','wb')
             f.write(data)
             f.close()
             #read to data and extract the img url
             f=open('c:\\xx.txt','r',encoding='utf-8')
             data=f.read()
             pattern = re.compile(r'src="(data/attachment/forum/.{20,40}\.jpg)')
             result = re.findall(pattern,data,0)
             f.close()
             return result

url_header='http://bbs.chinanews.com/'
url_first_page='http://bbs.chinanews.com/picview-185-4977929-1.shtml#'
picurls=get_all_picurl(url_first_page)
count=0
for a_url in picurls:
             count+=1
             print('processing'+' '+str(count)+":"+a_url+'...'+'\n')
             url_pic=url_header+a_url
             name_pic='C:\\Users\\Administrator\\Desktop\\chinanews\\'+str(count)+'.jpg'
             get_save(url_pic,name_pic)