reverse even index: did it right but can't proceed. Anyone can help me with this?
when i pass a list as the exemple [1,2,3,4,5] i got the right answer as [5,3,1] but when i click on CheckWork, i can't proceed. Why?
this is the question stem: Make a function named reverse_evens that accepts a single iterable as an argument. Return every item in the iterable with an even index...in reverse.
For example, with [1, 2, 3, 4, 5] as the input, the function would return [5, 3, 1].
You can do it!
def first_4(lista): return (lista[:4]) def first_and_last_4(lista): last_four = len(lista) - 4 return (lista[:4] + lista[last_four:]) def odds(lista): return(lista[1::2]) def reverse_evens(lista): return(lista[-1::-2])
Matt HansonTreehouse Moderator 17,659 Points
Hey, Diego. Here's a link to another post that should clear things up for you:
I got it now, thanks Matt.
Chris Freeman suggested to use this function
def reverse_evens_2(items): return items[::2][::-1]
but I use this (below) because was easier for me to undertand where I did it wrong
def reverse_evens(lista): evens = lista[0::2] evens.reverse() return(evens)