Python Port Scanner

#!/usr/bin/env python
from socket import *
import sys

targetIP = sys.argv[1]

setdefaulttimeout(0.1)

for i in range(20, 20000):
    s = socket(AF_INET, SOCK_STREAM)

    result = s.connect_ex((targetIP, i))

    if(result == 0) :
        print 'Port %d: OPEN' % (i,)
    s.close()