Python - python listas crear

import random

n = int(input('numero de elementos de la lista:'))

l = []

for i in range(n):

    a = random.randrange(1,20)

    l.append(a)

print(l)

suma = 0.0

#Calcula de la media

for i in l:

    suma = suma + i

media = suma / len(l)

print('Media = %4.2f' %media)

#valor maximo

print('Valor maximo = %d' %max(l))

#valor minimo

print('Valor minimo = %d' %min(l))