How to store values of a list in individual variables without knowing its size?

Question

I need to assign each integer value within a list of at least 1 item and at most 10 items to a separate variable. Then decrease 1 of each item, add them and print the result. These numerical values will be obtained by a input. For example:

#Se ela tiver 2 itens:

lista = input().split()

#convertendo para tipo inteiro:

def int_converter(list_x):
    counter = 0
    while 1 == 1:
        list_x[counter] = int(list_x[counter])
        if counter == (len(list_x) - 1):
            return list_x
        else:
            counter += 1
            continue

int_converter(lista)

#armazenando em variáveis:

a1, a2 = lista[0], lista[1]

#fazendo as operações que preciso e imprimindo o resultado:

resultado = (a1 - 1) + (a2 - 1)
print(resultado)

The problem is that I do not know how many numbers will be typed by the user, only that will be at least 1 and at 10. How do I do this without creating a condition for each case? I did this and the code became giant.

If there is a way to do this already with the lists, please let me know how.

Answer 1

You will get the list with:

lista = input().split()

But we must remember that values will be strings. To subtract 1 from each value and then compute the sum, just use the function sum and of Generator comprehension:

resultado = sum(int(numero) - 1 for numero in lista)

If the entrance is 2 3 4, the result will be 6, referring to the sum (2-1)+(3-1)+(4-1).

Answer 2

There is no point in storing each value of the list in different variables, remembering that a list is a vector of variables and has as one of the objectives precisely not having to declare N variables in the hand, there is no other way to do it but in the hand itself. The same meaning is to access the list values through the indices

lista = input().split()

#convertendo para tipo inteiro:

def int_converter(list_x):
    for i in range(len(list_x):
        list_x[i] = int(list_x[i])


int_converter(lista)

#Acessa todos os valores da lista e entrega de parametro para print

for i in range(len(lista)):
    print(lista[i])

#Ou...

for i in lista:
    print(i)

Edit: Since you commented on why you want to do this, it is still invalid to try to assign each element to a primitive type variable. Try to visualize the reason for the existence of vectors, in the case of your problem, something like this would solve:

def somaEstranha(lista):
     x = 0
     for i in range(len(lista)):
        x += lista[i] - i

     # Caso a primeira subtração tenha de ser por 1, 
     # basta fazer "x += lista[i] - (i + 1)"

    return x

Remember, every time an action in a code has become repetitive, it is a sign that it has to be replaced by only once the instruction within a loop, vectors serve for this assignment repetition case, too