Checks that a given tcp port is open.

check_tcp_port.py

import socket
import sys

def tcp_check(host, port=22):
    ClientSocket = socket.socket()
    try:
        ClientSocket.connect((host, int(port)))
        return_flag = True
    except socket.error:
        return_flag = False
    finally:
        ClientSocket.close()
    return return_flag

host = sys.argv[1] if len(sys.argv) == 3 else 'localhost'
port = sys.argv[2] if len(sys.argv) == 3 else 22
print "using host: {} with port: {}".format(host, port)
print tcp_check(host, port)