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

Abdullah Jassim
Abdullah Jassim
4,551 Points

Ive gone through previous solutions but why doesnt .extend work? Anything else wrong with my code?

def first_4(iterable):
    iter_list = list(iterable)
    return iter_list[:4]

def last_4(iterable):
    iter_list2 = list(iterable)
    return iter_list2[-4:]

def first_and_last_4(iterable):
    return iter_list.extend(iter_list2)
slices.py
def first_4(iterable):
    iter_list = list(iterable)
    return iter_list[:4]

def last_4(iterable):
    iter_list2 = list(iterable)
    return iter_list2[-4:]

def first_and_last_4(iterable):
    return iter_list.extend(iter_list2)

1 Answer

Within the first_and_last_4 function, it does not have access to neither iter_list nor iter_list2.