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#netstate-anov_deadloop.py

# works for windows XP SP-2, python2.5
from subprocess import call
import time
import sys

default_netstat_arglist = "-anov"


def build_arglist_as_is():
    one_space = " "
    arglist_as_is = one_space.join(sys.argv[1:])
    return arglist_as_is

arglist_passed = build_arglist_as_is()
arglist_passed_len = len(arglist_passed)

arglist = default_netstat_arglist

if arglist_passed_len > 0:
    arglist = arglist_passed

# call the nestat command and clear the screen before refresh it.
while True:
    call(["netstat", arglist], shell=True)
    time.sleep(4)
    # There would be errors if arg shell=True is omitted.
    call(["cls"], shell=True)