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

Posted by David Greenstein
David Greenstein
6,734 Points

Why is it saying it cant find first_and_last_4?

This should pass as it works on my console

slices.py 
def first_4(iterable):
    iterable_list = list(iterable)
    return(iterable_list[0:4])

def first_and_last_4(iterable2):
    iterable_list2 = list(iterable2)
    first_four = iterable_list2[0:4]
    last_four = iterable_list2[-1:-5:-1]

    mergedlist = []
    mergedlist.extend(first_four)
    mergedlist.extend(last_four)
    return mergedList

1 Answer

olegovich7
olegovich7
6,605 Points
olegovich7
olegovich7
6,605 Points

It seems like some sort of a bug. However this is my approach to this challenge which will allow you to pass it:

def first_and_last_4(a):
    result = list(a[0:4])
    result.extend(a[-4:])
    return result

One thing that I would mention is that variables created inside functions are only available inside those functions, so you don't really need to make names like iterable_list and iterable_list2. Both functions can use iterable_list.