# -*- coding: utf-8 -*-
# coding: utf-8
import sys

import os

import time

b='sudo tshark -i eth0 -R “tcp contains “attack”” -T fields -e ip.src -a duration:60>output.txt'

a=os.popen(b)

time.sleep(32)

f=open('output.txt','r')

text='IP address of attacker is'

print (text), f.read()

f.close

tshark: Lua: Error during loading:
[string "/usr/share/wireshark/init.lua"]:45: dofile has been disabled

tshark: "�" was unexpected in this context.