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Python Python Collections (Retired) Slices Slice Functions

Posted by Akshat Jain
Akshat Jain
6,810 Points

Why doesn't the following code work?

What am I doing wrong?

slices.py 
def first_4(iterable):
  return iterable[:4]
def odds(iterable):
  return iterable[1::2]
def first_and_last_4(iterable):
  return iterable[:4] + iretable[len(iterable)::-1]

2 Answers

shezazr
shezazr
8,275 Points
shezazr
shezazr
8,275 Points

for one in the last def you have a spelling mistake: iretable

second: your [len(iterable)::-1] is wrong.. i admittedly did try and error & got it to work.. but u don't need len()..

Matthew Bingham
Matthew Bingham
11,927 Points
Matthew Bingham
Matthew Bingham
11,927 Points

Took me a while to get this one as my brain decided that counting backwards four characters from the end of the value would be the best bet- how wrong I was - bed time I think!

Here is the code required to pass if you need it:

def first_4(iterable):
  return iterable[:4]

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

def first_and_last_4(iterable):
  return iterable[:4] + iterable[-4:]