使用Python访问并下载网页内容

#!/usr/local/bin/python3.2
import urllib.request,io,os,sys
req=urllib.request.Request("http://bbs.admin5.com/api.php?mod=js&bid=70")
f=urllib.request.urlopen(req)
s=f.read()
s=s.decode('gbk','ignore')
mdir=sys.path[0]+'/'
file=open(mdir+'admin5.txt','a',1,'gbk')
file.write(s)
file.close()