python关闭占用端口

# -*- coding: UTF-8 -*-
import os
import re

port = 8080
def kill_process():
        ret = os.popen("netstat -nao|findstr " + str(port))
        #注意解码方式和cmd要相同，即为"gbk"，否则输出乱码
        str_list = ret.read().decode('gbk')

        ret_list = re.split('',str_list)
        try:
                process_pid = list(ret_list[0].split())[-1]
                os.popen('taskkill /pid ' + str(process_pid) + ' /F')
                print "端口已被释放"
        except:
                print "端口未被使用"
if __name__ == '__main__':
        kill_process()

# output1 = os.popen('ipconfig')
# print output1.read().decode('gbk')