Welcome to the Treehouse Community
Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.
Looking to learn something new?
Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.
Start your free trial
Chris Christensen
9,281 PointsSlices Challenge Task 4
I'm confused as to why this isn't passing. I ran this through workspaces on both even and odd number of items in the iterable and it gives me the reverse evens. However, when I run it in the challenge it doesn't pass. Any help is appreciated.
def first_4(iterable):
return iterable[:4]
def first_and_last_4(iterable):
return iterable[:4] + iterable[-4:]
def odds(iterable):
return iterable[1::2]
def reverse_evens(iterable):
reverse = iterable[::-1]
return reverse[::2]
3 Answers
Christopher Shaw
Python Web Development Techdegree Graduate 58,248 PointsYou have the right idea, just get the evens first and then reverse it. That allows for an odd or even number of items in the list. A small gotch that catches a lot of people.
def reverse_evens(iterable):
evens = iterable[::2]
return evens[::-1]
Chris Christensen
9,281 PointsChristopher Shaw thanks so much! It is always something small. :)
James Morris
5,104 PointsHi, doesn't the following provide what the task asks for? I tested it on my pc and it works.
def reverse_evens(reven): return reven[::-2]