How to use the odrive.protocol.Channel function in odrive

def channel_from_usb_device(usb_device, printer=noprint):
    """
    Inits an ODrive Protocol channel from a PyUSB device object.
    """
    bulk_device = odrive.usbbulk_transport.USBBulkTransport(usb_device, printer)
    printer(bulk_device.info())
    bulk_device.init()
    return odrive.protocol.Channel(
            "USB device bus {} device {}".format(usb_device.bus, usb_device.address),
            bulk_device, bulk_device)

def channel_from_serial_port(port, baud, packet_based, printer=noprint):
    """
    Inits an ODrive Protocol channel from a serial port name and baudrate.
    """
    if packet_based == True:
        # TODO: implement packet based transport over serial
        raise NotImplementedError("not supported yet")
    serial_device = odrive.serial_transport.SerialStreamTransport(port, baud)
    input_stream = odrive.protocol.PacketFromStreamConverter(serial_device)
    output_stream = odrive.protocol.PacketToStreamConverter(serial_device)
    return odrive.protocol.Channel(
            "serial port {}@{}".format(port, baud),
            input_stream, output_stream)