Demo threaded Port Scanner

port_scanner.py

import threading
from queue import Queue
import socket

server = 'hackthissite.org'
ip = socket.gethostbyname(server)

def portscan(port):
    s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    try:
        con = s.connect((ip,port))
        with thread_lock:
            print('Port {} is open on {}'.format(port, server))
        con.close()
    except:
        pass

def threader():
    while True:
        worker = q.get()
        portscan(worker)
        q.task_done()

q = Queue()

for p in range(30):
     t = threading.Thread(target=threader)
     t.daemon = True
     t.start()

for worker in range(1,100):
    q.put(worker)

q.join()