arrays sum list unsupported operand type(s) for +=: 'int' and 'list'

[Larz60+]

It already does that:

def skaiciuoti(skaicius):
    global suma
    suma=0    
    for betkokszodis in skaicius:
        suma+=betkokszodis  
    return suma

first = [1, 2, 3, 4, 5]
second = [9, 3, 8, 6, 0, 12, 9]
print(skaiciuoti(first))
print(skaiciuoti(second))

output:

Output:
15
47