how to use python3.8 with ROS Kinetic in a node (import rospy)?

edit

Hey,

I am using ROS kinetic which supports python2.7. I want to run a node with python3.8 using rosrun.

when I used a shebang to test the script without any "import rospy" it worked.

but when I include "import rospy" to turn the script into a node and be able to send values, it gives me the following error: in <module> import yaml ModuleNotFoundError: No module named 'yaml'

I would greatly appreciate any idea to make ROS kinetic itself use python3.8 instead of python2.7 and fix this issue.

Thanks in advance