我的正則表達式應(yīng)該沒有錯

import urllib2

import re?

req = urllib2.urlopen('http://idcbgp.cn/course/list')

buf = req.read()

listurl = re.findall(r'src.*\.jpg',buf)

listurl = re.sub(r'src="','http:',str(listurl))

i = 0

for url in listurl:

? ? f = open('C:\\Users\\lenovo\\Desktop\\a\\'+str(i)+'.jpg','wb+')

? ? req = urllib2.urlopen(url)

? ? buf = req.read()

? ? f.write(buf)

? ? i = i + 1

print listurl