Welcome to the Treehouse Community

The Treehouse Community is a meeting place for developers, designers, and programmers of all backgrounds and skill levels to get support. Collaborate here on code errors or bugs that you need feedback on, or asking for an extra set of eyes on your latest project. Join thousands of Treehouse students and alumni in the community today. (Note: Only Treehouse students can comment or ask questions, but non-students are welcome to browse our conversations.)

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and a supportive community. Start your free trial today.

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

Ben Thrower
Ben Thrower
1,760 Points
Posted by Ben Thrower
Ben Thrower
1,760 Points

reverse evens

What is the problem here?

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

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

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

def reverse_evens(item):
    if len(item) % 2 == 0:
        return item[:-1:-2]

1 Answer

Steven Parker
Steven Parker
220,450 Points
Steven Parker
Steven Parker
220,450 Points

I see you've set the function up to handle the case where the list has an even number of items.

But shouldn't it also return something when the list has an odd number of items instead?