[ROS] ImportError: no module name yaml

Situation

I install ROS1, tello driver for Ubuntu 20.04 LTS. When I connected my tello drone and command below.

roslaunch tello_driver tello_node.launch

ans I received this..

Reason and Resolve

1. Reason
   There is not install yaml package at proper python version. In my situation, I use command python, but yaml package is installed at python3

2. Resolve

sudo apt-get install python-yaml
(not python3-yaml)

source ~/catkin_ws/devel/setup.bash

References

• https://answers.ros.org/question/11557/importerror-no-module-named-yaml/