[Python] Fonction de dérivation

def deriv(func, x, dx):
	return(func(x+dx)-func(x))/dx

Caml is a functional language: functions in the full mathematical sense are supported and can be passed around freely just as any other piece of data. For instance, here is a deriv function that takes any float function as argument and returns an approximation of its derivative function:

#let deriv f dx = function x -> (f(x +. dx) -. f(x)) /. dx;;
val deriv : (float -> float) -> float -> float -> float = <fun>
 
#let sin' = deriv sin 1e-6;;
val sin' : float -> float = <fun>
 
#sin' pi;;
- : float = -1.00000000013961143

def deriv(func, x, dx):
    return (f(x+dx)-f(x))/dx

def cube(x):
    return x**3

>>> deriv(cube, 3, 0.00001)
27.0009 (...)