codekingpro/portable-devtools

1import socket2 3 4def get_free_port() -> int:5    """6    Get a port that's free for both TCP and UDP.7 8    This method never raises. If no free port can be found, 0 is returned.9    """10    for _ in range(10):11        tcp = socket.socket(socket.AF_INET, socket.SOCK_STREAM)12        udp = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)13 14        try:15            tcp.bind(("", 0))16            port: int = tcp.getsockname()[1]17            udp.bind(("", port))18            udp.close()19            return port20        except OSError:21            pass22        finally:23            tcp.close()24 25    return 026