I am getting import error package not found when I execute the following "rosrun ros_essentials_cpp listener.py"

edit

execute this "rosrun ros_essentials_cpp listener.py" get the above

import yaml   File "/usr/lib/python3/dist-packages/yaml/__init__.py", line 399     class YAMLObject(metaclass=YAMLObjectMetaclass):                               ^ SyntaxError: invalid syntaximport yaml   File "/usr/lib/python3/dist-packages/yaml/__init__.py", line 399     class YAMLObject(metaclass=YAMLObjectMetaclass):                               ^ SyntaxError: invalid syntaxlistener.py"import yaml   File "/usr/lib/python3/dist-packages/yaml/__init__.py", line 399     class YAMLObject(metaclass=YAMLObjectMetaclass):                     import yaml   File "/usr/lib/python3/dist-packages/yaml/__init__.py", line 399     class YAMLObject(metaclass=YAMLObjectMetaclass):    ^ SyntaxError: invalid syntax

Ubuntu 20.04

$ env | grep ROS
ROS_VERSION=1
ROS_PYTHON_VERSION=3
ROS_PACKAGE_PATH=/home/kbest/catkin_ws/src:/opt/ros/noetic/share
ROSLISP_PACKAGE_DIRECTORIES=/home/kbest/catkin_ws/devel/share/common-lisp
ROS_ETC_DIR=/opt/ros/noetic/etc/ros
ROS_MASTER_URI=http://localhost:11311
ROS_ROOT=/opt/ros/noetic/share/ros
ROS_DISTRO=noetic