import?re
import?urllib

req?=?urllib.request.urlopen('http://www.xianlaiwan.cn/course/list')
buf?=?req.read().decode("utf-8")

#?listurl?=?re.findall(r'src=.+\.jpg',?buf)
listurl?=?re.findall(r'//img.+?\.jpg',?buf)

for?index,app_id?in?enumerate(listurl):
????listurl[index]?=?str(app_id).replace('//',?'http://')
????print(index,?listurl[index])
print(listurl)

i?=?0
for?url?in?listurl:
????f?=?open(str(i)?+?".jpg",?"wb+")
????req?=?urllib.request.urlopen(url)
????buf?=?req.read()
????f.write(buf)
????i?+=?1