A TCP port scanner using Python 3.9 subinterpreters and multithreading

sub_scanner.py

import time
import _xxsubinterpreters as subinterpreters
from threading import Thread
import textwrap as tw
import pickle
from queue import Queue

timeout = 1  # in seconds..

def run(host: str, port: int, results: Queue):
    # Create a communication channel
    channel_id = subinterpreters.channel_create()
    interpid = subinterpreters.create()
    subinterpreters.run_string(
        interpid,
        tw.dedent(
    """
    import socket; import _xxsubinterpreters as subinterpreters
    sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    sock.settimeout(timeout)
    result = sock.connect_ex((host, port))
    if result == 0:
        subinterpreters.channel_send(channel_id, port)
    else:
        subinterpreters.channel_send(channel_id, -1)
    sock.close()
    """),
        shared=dict(
            channel_id=channel_id,
            host=host,
            port=port,
            timeout=timeout
        ))
    output = subinterpreters.channel_recv(channel_id)
    subinterpreters.channel_release(channel_id)
    if output != -1:
        results.put(port)

if __name__ == '__main__':
    start = time.time()
    host = "127.0.0.1"  # or pick something else
    threads = []
    results = Queue()
    for port in range(80, 100):
        t = Thread(target=run, args=(host, port, results))
        t.start()
        threads.append(t)
    for t in threads:
        t.join()
    while not results.empty():
        print("Port {0} is open".format(results.get()))
    print("Completed scan in {0} seconds".format(time.time() - start))