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Python Python Collections (Retired) Slices Slicing With A Step

Silicing challenge !!

"Make a function name first_and_last_4 that accepts an iterable and returns the first 4 and last 4 items in the iterable." This is the 3rd task and I am getting error in my code..please help.. def first_4(x): return x[:4]

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

def first_and_last_4(z): returns first_4(x)+z[-4]

2 Answers

Anish Walawalkar
Anish Walawalkar
8,534 Points

This should fix your problem:

def first_and_last_4(z): 
    return  first_4(x) + z[-4:]
Jordan Bester
Jordan Bester
4,752 Points

make sure you add the z in that first_4

Sue Upton
Sue Upton
3,723 Points

A slice of a list returns a list so they can be added together like any other list.

def first_and_last(z): return z[0:4] + z[-4:]