Ros basics real robot project python

Hi, I have a warning in my code:

Everything works, so I don’t understand why I get that error

Hi, can you explain a little more on the situation?

What are you launching besides this program? Is the simulation running? some screenshots would be helpful too.

These strange errors sometimes can be solved by clearing your workspace and rebuilding, so it’s worth a try:

cd ~/catkin_ws && rm -rf build/ devel/ && catkin_make && source devel/setup.bash

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