Ah, you know what you’re doing! No need to discuss it, then .
Alright, I’m able to reproduce your issue. While I continue poking at it, my first question is: is ds4drv supposed to be using python2 or 3? Because by default the python plugin uses 3. But ROS’s python bits are python2. I assume if this is supposed to be resolved by rosdep, it’s python2.