I am trying to follow the tutorial here however, during one of the last steps when I run . install/setup.bash in a different terminal than the one I built in, the package is still not found.

The files are installed as expected (i.e. ~/dev_ws/install/py_pubsub/lib/py_pubsub/listener and .../talker).

Basically, my workflow is:

1. Open terminal
2. source /opt/ros/humble/setup.bash
3. cd ~/dev_ws
4. colcon build

There is a warning reported at this stage: SetuptoolsDeprecationWarning: setup.py install is deprecated. Use build and pip and other standards-based tools. warnings.warn( Then I open a new terminal:

1. source install/setup.bash
2. ros2 run py_pubsub listener

and I get Package 'py_pubsub' not found.

The following is my AMENT_PREFIX_PATH ~/dev_ws/install/turtlesim:~/dev_ws/install/py_pubsub:~/dev_ws/install/cpp_pubsub:/opt/ros/humble

Just as another reference point, the c++ tutorial is working fine.

I am using Ubuntu 22.04.

Any help would be appreciated!