coords = [(14, 9, 7), (11, 1, 20), (1, 1, 7), (13, 9, 1), (9, 13, 4), (20, 1, 4), (17, 6, 8), (14, 10, 1), (14, 2, 17), (7, 20, 7)]
lista = [[],[],[]] # [[x,x,x..], [y,y,y..], [z,z,z..]]
for x, y, z in coords: # fazer o unpacking de cada tuple
    lista[0].append(x)
    lista[1].append(y)
    lista[2].append(z)
print(lista)