python发送can消息无效果?

Question

查询文档后编写代码如下

import can
import cantools
db = cantools.database.load_file("xxx.dbc")

def send_one(msg_id, data):
    msg = db.get_message_by_frame_id(msg_id)
    _data = {_.name:0 for _ in msg.signals}
    _data.update(data)
    msg_data = msg.encode(_data)
    print(msg_data, msg.frame_id)
    message = can.Message(arbitration_id=msg_id, data=msg_data)
    bus = can.Bus(interface='vector', app_name='CANalyzer', channel=0, bitrate=500000)
    # bus.set_application_config("Configuration0.cfg")
    # bus.
    print(dir(bus))
    try:
        bus.send(message)
        print(f"Message sent on {bus.channel_info}")
    except can.CanError:
        print("Message NOT sent")
    bus.shutdown()

if __name__ == "__main__":
    # send_one()
    send_one(0x3d8,{"xxx": 0x1, "xxx": 0x01, "xxx": 0x01})

运行之后提示发送成功，但是实际上我在canalyzer面板上并没有看到消息的信号值发生变化，请问这里该怎么做才能是真的发送成功？