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Python Python Collections (Retired) Slices Slice Functions

Zack Parr
Zack Parr
4,091 Points

first_and_last_4

How the hell do figure this one out, I don't think Kenneth gave us a clue about adding two slices together!!

slices.py
def first_4(lst):
  return lst[:4]

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

def first_and_last_4(lst):
  return lst[:4]
  return lst[-4:]

1 Answer

Chris Freeman
MOD
Chris Freeman
Treehouse Moderator 67,989 Points

The key is to build the result from the two parts:

def first_and_last_4(lst):
  result = lst[:4] 
  result.extend(lst[-4:])
  return result

Chris I love your answers cause I can use them on other stuff, It never came to my mind the usage of extend lol. Thx