extraer IP de la lista lP.txt ,DROP puerto ssh y ALLOW puerto 25461,56259,54869,2154

import sys
import re

def main():
    """
    This is the main function.
    """
    input = sys.argv[1]
    output = sys.argv[2]
    f = open(input)
    f3 = open(output, 'w')
    for line in f:
        ip = re.findall(r'[0-9]+(?:\.[0-9]+){3}', line)
        if ip:
            ipstr = '.'.join(ip)
            f3.write("iptables -A INPUT -s " + ipstr + " -p tcp --dport 22 -j DROP;\n")
            f3.write("iptables -A INPUT -s " + ipstr + " -p tcp --dport 25461 -j ACCEPT;\n")
            f3.write("iptables -A INPUT -s " + ipstr + " -p tcp --dport 56259 -j ACCEPT;\n")
            f3.write("iptables -A INPUT -s " +