我正在尝试创建线程端口扫描程序，由于某些原因，以下代码导致程序等待，然后停止，但无输出。我已经用nmap测试了目标，端口80已打开，所以我很确定它是程序而不是目标。

import socket
import threading
import concurrent.futures

s = socket.socket(socket.AF_INET,socket.SOCK_STREAM)

s.settimeout(2)

def scan(target,port):
    try:
        con = s.connect((target,port))
        print(f"Port {port} is open")
        con.close()
    except:
        pass

with concurrent.futures.ThreadPoolExecutor(max_workers=100) as executor:
    for port in range(1,100):
        executor.submit(scan,"hackthissite.org",port)