How to import CustomMsg from Livox ROS 2 driver into a Python node?

[babakbch]

Hi Livox team,

Thanks for maintaining this driver — it's been working well for our application.

In the ROS 1 version of the Livox driver, I was able to import CustomMsg in a Python node like this:
from livox_ros_driver.msg import CustomMsg

I am now using the ROS 2 version (livox_ros2_driver) on ROS 2 Humble, and would like to do the same: access CustomMsg in a Python node.

However, the message type does not appear to be available via Python — even after building the workspace successfully and sourcing it:

python3 -c "from livox_ros2_driver.msg import CustomMsg"

→ ModuleNotFoundError: No module named 'livox_ros2_driver'

Is CustomMsg meant to be exposed for Python usage in the ROS 2 driver?

If not, is there a recommended way to do this cleanly — e.g., through livox_interfaces or a separate message package?

My use case involves writing a Python ROS 2 node that tags LiDAR frames using externally triggered PPS timestamps, so I need to subscribe to the livox_ros2_driver CustomMsg topic in Python.

Thanks in advance!