python端口扫描

#author:Blood_Zero
#coding:utf-8

import socket
import sys

PortList=[21,22,23,25,80,135]
#

host=sys.argv[1]

for i in PortList:
    sock=socket.socket()
    sock.settimeout(2)
    try:
        sock.connect((host,i))
        print "the port %d is open" %i
    except Exception:
        print "the port %d is not open" %i
    sock.close()