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The command:

$ echo $ROS_PACKAGE_PATH

It is not needed, however, always when you're going to use a workspace you must source the setup.bash "This command tells which packages are inside the workspace."

And it is not directly connected with your Python Version.

The command:

$ echo $ROS_PACKAGE_PATH

It is not needed, however, always when you're going to use a workspace you must source the setup.bash

"This command tells which packages are inside the workspace."

And it is not directly connected with your Python Version. Version.