This is a piece of code for checking if an ip:port is open and also do continuous checks.

check_ip_port.py

import socket
from time import sleep

def is_open(ip,port,timeout=5):
    socket.setdefaulttimeout(timeout)
    s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

    try:
      s.connect((ip, int(port)))
      s.shutdown(2)
      return True
    except:
      return False


def keep_checking(ip,port,intervals=5,rounds=10,infinite=False):
    def check():
        if is_open(ip, port):
            print("{}:{} is open...".format(ip, port))
        else:
            print("{}:{} is closed...".format(ip, port))
        print("sleeping for {} second(s)".format(intervals))
        sleep(intervals)

    if infinite:
        while True:
            check()
    else:
        for i in range(rounds):
            check()


if __name__=='__main__':
    keep_checking('127.0.0.1',5000)