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Mario16
Asked: 2022-07-06 02:25:12 +0800 CST 2022-07-06 02:25:12 +0800 CST

Why can't I call this function with the arguments in python?

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#Definir una función que calcule la longitud de una lista
# o una cadena 

def longi(numero,lista):
    lista = [1,2,3,4,5,36,7,8,9,3,4,5,6,7,5,4,3,4]
    numero = 0
    for i in lista:
    numero = numero + 1

    print(numero)

longi(numero,lista)

I am trying to define a function which counts how many numbers have a list, but when calling the function with the arguments it tells me that they are not defined. Does anyone know why?

python

1 Answers

  1. Best Answer

    If you are going to call a function, you have to have the parameters beforehand, like here:

    lista = [1,2,3,4,5,36,7,8,9,3,4,5,6,7,5,4,3,4]
numero = 0
longi(numero,lista)

    The function longirequires that numeroand listaare already defined.

    The function longiboils down to this:

    def longi(numero,lista):
    for i in lista:
        numero = numero + 1
    print(numero)

    It's a bad idea to do input/output inside functions though (unless that's your specific purpose). It is better to just return the value and the caller will take care of printing it.

    show

    def longi(numero,lista):
    for i in lista:
        numero = numero + 1
    return numero

lista = [1,2,3,4,5,36,7,8,9,3,4,5,6,7,5,4,3,4]
numero = 0
largo = longi(numero,lista)
print(largo)

    produces:

    18

Process finished with exit code 0
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