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Python Python Collections (2016, retired 2019) Slices Slice Functions

Andrei Oprescu
Andrei Oprescu
9,547 Points

I have done this question correctly, but it said i'm wrong!

I have a question on a challenge that asks me this:

You're on fire! Last one and it is, of course, the hardest. 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!

My code that I am using is at the bottom of the page. Is there something wrong with my code?

I have checked it also in the workspace and it gave correct answers.

can someone help me?

Thanks!

slices.py
def first_4(numbers):
    return numbers[:4]

def first_and_last_4(numbers):
    return numbers[:4] + numbers[-4:]

def odds(numbers):
    return numbers[1::2]

def reverse_evens(numbers):
    return numbers[::-2]

2 Answers

Chris Freeman
MOD
Chris Freeman
Treehouse Moderator 68,441 Points

You solution does work when the input list has an odd number of items. How does you solution work for [1, 2, 3, 4, 5, 6] as the input? It should also return the value [5, 3, 1]

Hint: get the odd index members, then reverse it.

Post back if you need more help. Good luck!

Andrei Oprescu
Andrei Oprescu
9,547 Points

Thank you!

This really helped. I will remember this way of thinking.