portscan.py

#! /usr/bin/env python

import optparse
parser = optparse.OptionParser('usage %prog -H' +\
    '<target host> -p <target port>')

parser.add_option('-H', dest='tgtHost', type='string', \
    help='specify target host')

parser.add_option('-p', dest='tgtPort', type='int', \
    help='specify target port')
(options, args) = parser.parse_args()
tgtHost = options.tgtHost
tgtPort = options.tgtPort
if (tgtHost == None) | (tgtPort == None):
    print parser.usage
    exit(0)