It's characteristic of a dynamical system in nonlinear dynamic. We are going to use this function like test data.
It's part of data analysis. We use simple function, but here's example of why we should calculate Lyapunov indicators. It helps in the study of chaos.
You can use Python with data package: Anaconda or Miniconda. There's another way - use Portable Python. Also you can use whatever IDE for Python.
Free