I got a mission to get an input with only a list and convert it to the output in a way that only the even objects would be in it, and the last one

Asked May 31 '22 at 11:07

Active May 31 '22 at 11:14

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I got a mission to get an input with only a list and convert it to the output in a way that only the even objects would be in it, and the last one to be with 'and' before it.

I did it that way:

def format_list(my_list):
    even_list = my_list[1:-1:2]
    even_list = str(even_list)

    and_to_end = 'and'

    last_list = my_list[-1]
    last_list = str(last_list)
    total_end = f'{and_to_end} {last_list}'
    full_even_list = f'{even_list} {total_end}'

    return full_even_list


print(format_list(["hydrogen", "helium", "lithium", "beryllium", "boron", "magnesium"]))

output:

['helium', 'beryllium'] and magnesium

and I want the output to look like this:

hydrogen, lithium, boron, and magnesium

how can i do it?

edited May 31 '22 at 11:08

0stone0

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asked May 31 '22 at 11:07

Idan Abramovich

Your expected output has odd elements. Did you want that? What about when the input list has even elements or only one/two element – kuro May 31 '22 at 11:13
@kuro depends if you start at 1 or 0 ... – Titouan L May 31 '22 at 11:13
For fun: `' and '.join(reversed([(l2:=lst[1::2]).pop(-1), ', '.join(l2)]))` – mozway May 31 '22 at 11:14
@TitouanL, right. But OP needs to confirm that. OP's code uses element starting from index 1 when expected output start from index 0 – kuro May 31 '22 at 11:15
Full function body: `return ', '.join(my_list[:-1:2]) + ' and ' + my_list[-1]` – Matthias May 31 '22 at 11:16
@kuro, I expect to get the even elements and before the last one to have an 'and' – Idan Abramovich May 31 '22 at 11:30
It works! thanks @Matthias and everybody – Idan Abramovich May 31 '22 at 11:36

I got a mission to get an input with only a list and convert it to the output in a way that only the even objects would be in it, and the last one

0 Answers0