import socket
from contextlib import closing


def free_port():
    with closing(socket.socket(socket.AF_INET, socket.SOCK_STREAM)) as sock:
        sock.bind(("", 0))
        return sock.getsockname()[1]


def check_port_open(host, port) -> bool:
    with closing(socket.socket(socket.AF_INET, socket.SOCK_STREAM)) as sock:
        return sock.connect_ex((host, port)) == 0