Import_error while following every step of the tutorial

Course Support ROS2 In 5 Days Python
1

I’m getting a import error multiple times. Fixed it once but i can’t remember how i did that. Is there someone who can help me?

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What exactly are you trying to import? Is it a class in launch_ros.actions? If so use
from launch_ros.actions import Node or whatever it is. Also post the exact error. If you created a new package, make sure you catkin_make first and source ~/catkin_ws/devel/setup.bash in EVERY SHELL, otherwise, it doesnt know where launch_ros is.

1 Like
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Thanks, I forgot to use colcon build.

1 Like
4

@simon.steinmann91,

Many thanks for helping out as usual! Your input was quite helpful, as we can all see :wink:

In ROS2, among others, we use:

  • ~/ros2_ws/
  • colcon build
  • source ~/ros2_ws/install/setup.bash

You might want to check the course out!

@boyligtvoet

Way to go. Go go go pushing your ROS2 learning :slight_smile:.