Python检查服务器端口是否连接成功

import socket
sk = socket.socket(socket.AF_INET,socket.SOCK_STREAM)
sk.settimeout(1)
try:   
    sk.connect(('192.168.1.100',3389))      

    print "server port connect OK! "
except Exception:
    print "server port not connect!"
sk.close()