多线程。如何正确同时ping多个IP？

import threading
import subprocess

def ping(ip):
    result = subprocess.run(['ping', '-c', '1', ip], capture_output=True)
    if result.returncode == 0:
        print(f'{ip} is reachable')
    else:
        print(f'{ip} is unreachable')

def main():
    ips = ['192.168.0.1', '192.168.0.2', '192.168.0.3']  # 要ping的IP地址列表

    # 创建线程池
    thread_pool = []

    # 创建并启动线程
    for ip in ips:
        thread = threading.Thread(target=ping, args=(ip,))
        thread.start()
        thread_pool.append(thread)

    # 等待所有线程执行完毕
    for thread in thread_pool:
        thread.join()

if __name__ == '__main__':
    main()