can't find the code named example_robot_data

[archerwangms]

in the L4_floating_base_dynamics.py. I can't find the class named example_robot_data

[mfocchi]

dear @archerwangms did you install all the necessary dependencies as requested in?
https://github.com/mfocchi/locosim

sudo apt install robotpkg-py27-example-robot-data (ubuntu16 - ROS kinetic)
sudo apt install robotpkg-py35(or py38)-example-robot-data (ubuntu18 - ROS melodic / ubuntu 20 - ROS noetic)