NameError: global name 'PackageNotFoundError' is not defined about urdf2webots HOT 10 CLOSED

@BenjaminHug8 yes it is. Thank you for the prompt responses throughout this thread!

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Thank you for raising this issue, I will fix that!

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May I ask you your ROS distribution?

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It seems like you are missing the ros-DISTRO-ament-index-python, where DISTRO is your ros distribution.

If it is already installed, can you show your PYTHONPATH?

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$ printenv | grep -i ROS
ROS_VERSION=2
ROS_PYTHON_VERSION=3
AMENT_PREFIX_PATH=/opt/ros/foxy
PYTHONPATH=/opt/ros/foxy/lib/python3.8/site-packages
_colcon_cd_root=/home/drakeprovost/ros2_install
LD_LIBRARY_PATH=/usr/lib/x86_64-linux-gnu/gazebo-11/plugins:/opt/ros/foxy/opt/yaml_cpp_vendor/lib:/opt/ros/foxy/opt/rviz_ogre_vendor/lib:/opt/ros/foxy/lib/x86_64-linux-gnu:/opt/ros/foxy/lib
ROS_LOCALHOST_ONLY=0
PATH=/opt/ros/foxy/bin:/sbin:/bin:/usr/bin:/usr/local/bin:/snap/bin
ROS_DISTRO=foxy

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$ printenv | grep -i ROS
ROS_VERSION=2
ROS_PYTHON_VERSION=3
AMENT_PREFIX_PATH=/opt/ros/foxy
PYTHONPATH=/opt/ros/foxy/lib/python3.8/site-packages
_colcon_cd_root=/home/drakeprovost/ros2_install
LD_LIBRARY_PATH=/usr/lib/x86_64-linux-gnu/gazebo-11/plugins:/opt/ros/foxy/opt/yaml_cpp_vendor/lib:/opt/ros/foxy/opt/rviz_ogre_vendor/lib:/opt/ros/foxy/lib/x86_64-linux-gnu:/opt/ros/foxy/lib
ROS_LOCALHOST_ONLY=0
PATH=/opt/ros/foxy/bin:/sbin:/bin:/usr/bin:/usr/local/bin:/snap/bin
ROS_DISTRO=foxy

It seems all good to me, have you checked if ros-foxy-ament-index-python is installed?

Could you try to use python3 instead of python2 when running the script?

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Forgive my ignorance, can you tell me how to check if ros-foxy-ament-index-python is installed?

Trying python3 does seem to have accomplished something (if python2 doesn't work, it might be worth updating the command in the README):

$ python3 -m urdf2webots.importer --input=Rover_2022.urdf --output=Rover_2022.proto
Root link: Chassis
There are 5 links, 4 joints and 0 sensors
$ ls
README.md  Rover_2022.csv  Rover_2022.proto  Rover_2022_textures  Rover_2022.urdf

(In response to the "package not found" stuff, I see I have in Rover_2022.urdf a lot of <mesh filename="package://Rover_2022/meshes/Chassis.STL" /> but haven't put the meshes repo in my directory, so that one's on me. I'll update this comment once I've done that)

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Forgive my ignorance, can you tell me how to check if ros-foxy-ament-index-python is installed?

One way to do it is to run dpkg -l ros-foxy-ament-index-python in a terminal, but as python3 is working that means it is installed.

Trying python3 does seem to have accomplished something

Nice :)

As ROS 2 is working with python3 you probably cannot run the conversion tool with python2.

(if python2 doesn't work, it might be worth updating the command in the README):

I guess it might help users you are right, but as you can use the tool with ROS 1 (which is suppose to work with python2 until noetic I guess) I will add something accordingly.

$ python3 -m urdf2webots.importer --input=Rover_2022.urdf --output=Rover_2022.proto
Package "Rover_2022" not found.
Can't determine package root path.

This error mainly says that no "Rover_2022" package has been found with ROS 2, you either need to install the package and then re source foxy, or if it is your package you should build it and then source it.
Here is an example in our ROS 2 packages that should be released this summer with Webots R2022b.

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(if python2 doesn't work, it might be worth updating the command in the README):

I guess it might help users you are right, but as you can use the tool with ROS 1 (which is suppose to work with python2 until noetic I guess) I will add something accordingly.

I confirm that ROS 2 and ROS 1 noetic uses python3.

ROS 1 Melodic works with python2 but I believe it should also work with python3. As we no longer support Melodic I will simply change the command for python3.

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@DrakeProvost is your issue solved?

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