Pile en python

def empiler(x, p):
    elements = p[0]
    indice = p[1]
    elements[indice] = x
    p[1] = indice+1
   # print('%s %s' % (i, x))

def depiler(p):
    elements = p[0]
    indice = p[1]
    p[1] = indice - 1
    return elements[indice - 1]

def sommet(p):
    indice = p[1] - 1
    return p[0][indice]

def pileVide(TMAX=200):
    return [[None]*TMAX, 0]


pile = pileVide(5)

empiler(1, pile)
empiler(2, pile)
print(depiler(pile))
empiler(3, pile)
print(sommet(pile))

print(pile)