Mi solución sin ver la solución del profesor ...

new_list = []


def magic_function(list):
    global new_list

    for item in list:
        temp = item[::-1]
        new_list.append(temp)

    return new_list


if __name__ == '__main__':
    list = ["Hello World", "Hello Python", "1 2 3 4 5 6 7 8"]
    print(magic_function(list))

Salida:
['dlroW olleH', 'nohtyP olleH', '8 7 6 5 4 3 2 1']

Mi solución sin ver la solución del profesor ...

new_list = []


def magic_function(list):
    global new_list

    for item in list:
        temp = item[::-1]
        new_list.append(temp)

    return new_list


if __name__ == '__main__':
    list = ["Hello World", "Hello Python", "1 2 3 4 5 6 7 8"]
    print(magic_function(list))

Salida:
['dlroW olleH', 'nohtyP olleH', '8 7 6 5 4 3 2 1']

Mi solución sin ver la solución del profesor ...

new_list = []


def magic_function(list):
    global new_list

    for item in list:
        temp = item[::-1]
        new_list.append(temp)

    return new_list


if __name__ == '__main__':
    list = ["Hello World", "Hello Python", "1 2 3 4 5 6 7 8"]
    print(magic_function(list))

Salida:
['dlroW olleH', 'nohtyP olleH', '8 7 6 5 4 3 2 1']