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

Posted by MIK 7
MIK 7
Courses Plus Student 881 Points

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 68,441 Points
Chris Freeman
Chris Freeman
Treehouse Moderator 68,441 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!