installing ros2-foxy-angles does not expose a Python angles module (perhaps because setup.py refers to catkin?) ros2 foxy API Doc is 404. When Python is supported suggest the API Doc include: - place <exec_depends>angles</exec_depends> in package.xml - run rosdep install -i --from-path src in your ros2 workspace root - code example: import angles field_of_view_radians = angles.from_degrees(25.0)