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Python Python Collections (Retired) Slices Slice Functions

Laknath Gunathilake
Laknath Gunathilake
1,860 Points
Posted by Laknath Gunathilake
Laknath Gunathilake
1,860 Points

can't seem to pass the last step

I think I understand how I get the first and last 4 items separately, but I don't know how I get them in one list. Anyway's can't seem to pass this challenge

slices.py 
def first_4(arg):
  return arg[0:4]
def odds(arg):
  return arg[1::2]
def first_and_last_4(arg):
  return (arg)[0:4]
  return (arg) [-4:]

1 Answer

Kourosh Raeen
Kourosh Raeen
23,733 Points
Kourosh Raeen
Kourosh Raeen
23,733 Points

Hi Laknath - You need to have one return statement. Just concatenate the two slices with + and return it. Also, you don't need parenthesis around arg.

Laknath Gunathilake
Laknath Gunathilake
1,860 Points
Laknath Gunathilake
Laknath Gunathilake
1,860 Points

concatenating the two slices with a + doesnt seem to work. 

def first_and_last_4(arg):
   return arg [0:4]+[-4:]
Kourosh Raeen
Kourosh Raeen
23,733 Points
Kourosh Raeen
Kourosh Raeen
23,733 Points

You still need to use arg for the second slice:

def first_and_last_4(arg):
  return arg[0:4] + arg[-4:]