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

how to get firstANDlast items inside a list ?

i did it like this :

def first_and_last_4(x): num1 = x[-4:] num2 = x[::-1] num3 = num2[-4:] num4 = [num3, num1] return num4 avg = first_and_last_4(???) print(avg)

slices.py
def first_4(x):
    return x[0:4]
def first_and_last_4(x):
    num1 = x[-4:]
    num2 = x[::-1]
    num3 = num2[-4:]
    num4 = [num3, num1]
    return num4

1 Answer

Chris Freeman
MOD
Chris Freeman
Treehouse Moderator 68,167 Points

You are on the right path. The first four can be found using x[:4] and the last four can be found using x[-4:]. You can then join these with a simple + sign.

Post back if you need more help. Good Luck!