I started learning Python one month ago and I am not sure if I am doing the right thing to sum values in a list. I have the following list with car models and I would like to sum the total vehicle available. I tried several things and I am still reading the documentation on Python.org, but I am not sure if it is the simple way to find the total car models available in a list. Please, can one give a tip? Regards

carros = ["ferrari", "porsche", "bugatti", "ferrari", "porsche"]
total = [ ]
lista = [ ]
for key, value in enumerate(carros):
num = int(key)
total.append(num)
for nums in total:
valores = total.count(nums)
lista.append(valores)
soma = sum(lista)
print(soma)

What you are naming key, is in fact an index into carros. If you print(total), you’ll see the index values: [0, 1, 2, 3, 4] – 5 in total, one for each car.

Then in your second for: loop, valores will always be 1, because total.count(nums) will only ever hold one value, so you’ll get a list that is [1, 1, 1, 1, 1].

You can better what is going on with:

for key, value in enumerate(carros):
print(f"{key}: {carros[key]}")

Or this, which will output the same:

for key, value in enumerate(carros):
print(f"{key}: {value}")