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Hello,

ROS kinetic is not compatible with ROS 3. However I had a similar use case (using python 3 for object detection) and i managed to integrate it to my ros application by using a workaround:

I created a ROS node that handles the inputs/outputs of the application (and their conversions in ROS format). This node would open a python 3 application using the subprocess module:

subprocess.Popen("Pyhton3command".split())

Then i would use a socket in order to communicate between the two processes.

I hope this can help.