"Illustrator Foundations" was retired on January 6, 2020. You are now viewing the recommended replacement.

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

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

Slices.py - I was able to replicate the desired output in Workspace but not sure what's problem in executing it internal

def first_4(arg1): return arg1[0:4]

def first_and_last_4(arg2): map_all = arg2[0:4] + arg2[-4:] return map_all

def odds(arg3): return arg3[1::2]

def reverse_evens(arg4): reverse_arg4 = arg4[::-1] return reverse_arg4[::2]

slices.py
def first_4(arg1):
    return arg1[0:4]

def first_and_last_4(arg2):
    map_all = arg2[0:4] + arg2[-4:]
    return map_all

def odds(arg3):
    return arg3[1::2]

def reverse_evens(arg4):
    reverse_arg4 = arg4[::-1]
    return reverse_arg4[::2]

1 Answer

Steven Parker
Steven Parker
231,269 Points

Your solution only works when the number of items is odd. When the list has an even number it returns "reverse odds" instead.

You had a good idea, but try selecting the even indexes first and then reversing them.