unzip in another encoding

unzip_chn.py

#!/usr/bin/env python2
# -*- coding: utf-8 -*-

import os
import sys
import zipfile

if len(sys.argv) == 1:
    sys.exit(0)

print "Processing File " + sys.argv[1]

file = zipfile.ZipFile(sys.argv[1],"r");
for name in file.namelist():
    utf8name = name.decode('gbk')
    print "Extracting " + utf8name
    pathname = os.path.dirname(utf8name)
    if not os.path.exists(pathname) and pathname!= "":
        os.makedirs(pathname)
    data = file.read(name)
    if not os.path.exists(utf8name):
        fo = open(utf8name, "w")
        fo.write(data)
        fo.close
file.close()