Composing functions in python

Question

I have an array of functions and I\'m trying to produce one function which consists of the composition of the elements in my array. My approach is:

def compo         


        

Answer 1

def compose (*functions):
    def inner(arg):
        for f in reversed(functions):
            arg = f(arg)
        return arg
    return inner

Example:

>>> def square (x):
        return x ** 2
>>> def increment (x):
        return x + 1
>>> def half (x):
        return x / 2

>>> composed = compose(square, increment, half) # square(increment(half(x)))
>>> composed(5) # square(increment(half(5))) = square(increment(2.5)) = square(3.5) = 12,25
12.25