General

[DavideDC9]

Would be useful to have a brief description on top of each file to understand better what it does.
e.g :

-- coding: utf-8 --

""" Example of simulation of a bouncing ball.

The bouncing ball trajectory is calculated for boundary condition of
............................................................................ Then, the velocity
............................................ variations resulting from a time-varying solver  
are simulated using the ....................... method of ............................................).

"""
import matplotlib.pyplot as plt
import numpy as np
from scipy.constants import pi