how to add or use tfx python module for catkin?

edit

i download a repository [ https://github.com/simon0793/pr2_simu... ] i am using catkin_workplace when ever i run python code

python simulation_one_motion_queue.py

every time error comes tfx not found as;

    raise ResourceNotFound(name, ros_paths=self._ros_paths)
rospkg.common.ResourceNotFound: tfx
ROS path [0]=/opt/ros/indigo/share/ros
ROS path [1]=/home/mudasser/p/src
ROS path [2]=/opt/ros/indigo/share
ROS path [3]=/opt/ros/indigo/stacks