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Python Python Collections (Retired) Slices Slice Functions

Posted by Emma Kiffel
Emma Kiffel
6,264 Points

Can't combine my slices?

I'm working on part 3 of slices.py, and while I can get the first 4 and the last 4 items individually, I can't combine them to be returned as one. I have tried .extend() as shown, making 2 variables called first and last and trying to use .extend() that way, putting the two slices together in the brackets separated by a comma, using a plus between the two in bracket notation, and just setting them right next to each other [:4][-4]. Did I miss a lesson somewhere?

slices.py 
def first_4(iti):
  return iti[:4]
def odds(iti):
  return iti[1::2]
def first_and_last_4(iti):
  return iti[:4].extend(iti[-4:])

1 Answer

Vittorio Somaschini
Vittorio Somaschini
33,371 Points
Vittorio Somaschini
Vittorio Somaschini
33,371 Points

Hello Emma.

You can just put a plus between the two slices and you will be fine.

Vitto

Emma Kiffel
Emma Kiffel
6,264 Points

Thank you! I realized that when I tried this the first time, I didn't put iti before my second bracket notation.