ROS2 catkin_pkg not found (is installed and using version 3.8)

Question

I built a new package using moveit2 for panda and when I try to colcon build I have the following error:

Traceback (most recent call last):
  File "/opt/ros/humble/share/ament_cmake_core/cmake/core/package_xml_2_cmake.py", line 22, in <module>
    from catkin_pkg.package import parse_package_string
ModuleNotFoundError: No module named 'catkin_pkg'
CMake Error at /opt/ros/humble/share/ament_cmake_core/cmake/core/ament_package_xml.cmake:95 (message):
  execute_process(/usr/local/bin/python3.8
  /opt/ros/humble/share/ament_cmake_core/cmake/core/package_xml_2_cmake.py
  /home/mikel/dualpandaWS/src/franka_moveit_config/package.xml
  /home/mikel/dualpandaWS/build/franka_moveit_config/ament_cmake_core/package.cmake)
  returned error code 1
Call Stack (most recent call first):
  /opt/ros/humble/share/ament_cmake_core/cmake/core/ament_package_xml.cmake:49 (_ament_package_xml)
  /opt/ros/humble/share/ament_cmake_core/cmake/core/ament_package.cmake:63 (ament_package_xml)
  CMakeLists.txt:6 (ament_package)

I have searched through interent and tried sudo apt install python3-catkin-pkg and sudo update-alternatives --config python to see what python version I'm using, which returns:

There is only one alternative in link group python (providing /usr/bin/python): /usr/bin/python3.8
Nothing to configure

I dont know what can I do to solve this problem, seems that I lack some kind of configuration so I can build my workspace... Any help please?

Answer 1

make sure you installed colcon:

sudo apt install python3-colcon-common-extensions

also rosdep might help you to install dependencies:

rosdep update
rosdep install --from-paths src -y --ignore-src

and also make sure you source your ros2 env (you seem to done so already but just incase).

other than that your question seems similiar to this in that case

pip install catkin_pkg