import socket

def test_udp_port(ip, port):
    sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
    sock.settimeout(2)
    try:
        sock.sendto(b'test', (ip, port))
        data, addr = sock.recvfrom(1024)
        print(f"UDP 端口 {port} 通")
    except socket.timeout:
        print(f"UDP 端口 {port} 不通")
    except Exception as e:
        print(f"发生错误: {e}")
    finally:
        sock.close()

test_udp_port('127.0.0.1', 5000)  # 替换为您要测试的 IP 和端口