Clean Random IP Port Scanner

import os
import sys
import random
import threading
import time
import string
import socket

thread_tid = []

def get_session_thread():
    global thread_tid
    stid = "".join(random.choice(string.lowercase + string.digits) for x in range(4))
    return stid

def run_threads(hosts):
    failure_code = "failure"
    success_code = "success"
    try:
        sock = socket.socket()
        socket.setdefaulttimeout(1)
        result = sock.connect_ex((hosts, 22))
        if (result == 0):
            return success_code
            sock.close()
        else:
            return failure_code
            sock.close()
    except socket.error:
        return failure_code

def process_threads():
    global thread_tid

    while True:
        oct1 = random.randint(1, 254)
        oct2 = random.randint(1, 254)
        oct3 = random.randint(1, 254)
        oct4 = random.randint(1, 254)

        final = str(oct1) + "." + str(oct2) + "." + str(oct3) + "." + str(oct4)

        thread_id = get_session_thread()
        status_code = run_threads(final)
        print("{:<25}: {:.4} | {:.7}".format(final, thread_id, status_code))
        if (status_code == "success"):
            f = open("a.out", "a").write(final+'\n')

        elif (status_code == "failure"):
            pass

process_threads()