Associate two lists in python

Question

Associate two lists, a car name list and another color list and each containing n elements:

listaCarros = ["gol","uno","corsa","palio","idea"]
listaCores = ["branco","verde","preto","cinza","azul"]

with the output in this format:

"The goal is white"

I did the following:

n=0

while n <= 5:

    print("\nO", end=' ')
    print(listaCarros[n],end=' é ')
    print(listaCores[n])
    n = n + 1

worked, but this message appeared:

Traceback (Most recent call last): "file path" line 286, in print(listCarros[n],end=' is ') Indexerror: list index out of range

would have a better way of doing that?

Answer 1

The condition <= 5 is wrong, because if the lists have 5 elements only have between 0 and 4 indices (because these start at 0), try this version of the code while n < 5, or better, while n < len(listaCarros): .

That said, here’s a version more pythonica and with fewer lines, the 'best way':

listaCores = ['azul', 'vermelho', 'verde', 'laranja', 'branco', 'preto']
listaCarros = ['mazda', 'toyota', 'honda', 'pegeot', 'mercedez', 'BMW']
text = ''
for carro, cor in zip(listaCarros, listaCores):
    text += '\nO {} é {}'.format(carro, cor)
print(text)

DEMONSTRATION

To do as you were doing (with while) using this example (you need to be careful that the lists run the same number of elements, or construct the cycle based on the list with fewer elements):

listaCores = ['azul', 'vermelho', 'verde', 'laranja', 'branco', 'preto']
listaCarros = ['mazda', 'toyota', 'honda', 'pegeot', 'mercedez', 'BMW', 'saf', 'safs']

n = 0
text = ''
min_list = min(len(listaCores), len(listaCarros))
while n < min_list: # fazes isto caso nao tenhas a certeza que as listas tem o mesmo num de elementos
    text += '\nO {} é {}'.format(listaCarros[n], listaCores[n])
    n += 1
print(text)

DEMONSTRATION