Making a copy list in a function

[RuyCab]

I'm getting a error in the function (make_great). I saw that we use [:] to pass a copy of the list to a function, but it's not working.
Does someone understand why this problem is occurring ?

def show_magicians(magicians_list):
    for indice, magician in enumerate(magicians_list):
        print(f'Magician {indice+1}: {magician}')

def make_great(magicians_list[:]):
    list_aux = []
    for magician in magicians_list:
        magician = 'O grande ' + magician
        list_aux.append(magician)
    return list_aux

magicians_aux = make_great(magicians)
show_magicians(magicians)
show_magicians(magicians_aux)

Yoriz write Jul-11-2021, 02:02 PM:
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[Yoriz]

def make_great(magicians_list[:]):

Don't use [:] on the parameter

---

Use [:] inside the function

def make_great(magicians_list):
    list_aux = []
    for magician in magicians_list[:]:
        ...
        ...

---

If you actually want to pass in a copy of the list and the function uses the passed-in list, use

magicians_aux = make_great(magicians[:])

def make_great(magicians_list):
    list_aux = []
    for magician in magicians_list:
        ...
        ...