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Python Python Collections (2016, retired 2019) Slices Slice Functions

tyler bucasas
tyler bucasas
2,453 Points
Posted by tyler bucasas
tyler bucasas
2,453 Points

slices.py

im just stuck on step 2 of this challenge. specifically the part when it asks for the last 4 items.

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

def first_and_last_4(list):
    return(list[:4 and -4::-1])

1 Answer

Steven Parker
Steven Parker
231,269 Points
Steven Parker
Steven Parker
231,269 Points

Here's a few hints:

  • you can't combine values with logic operators to make one slice do two things
  • but you can concatenate separate strings together with the "+" operator
  • you might use two different slices for the first and last parts
tyler bucasas
tyler bucasas
2,453 Points
tyler bucasas
tyler bucasas
2,453 Points 
def first_4(list):
    return(list[:4])

def first_and_last_4(list):
    return(list[:4]) + (list[-4::-1])

Steven Parker am I on the right track?

Steven Parker
Steven Parker
231,269 Points
Steven Parker
Steven Parker
231,269 Points

Very close! But you don't need to reverse the order of the last 4 items.

Also, you don't need to enclose the terms in parentheses (but it doesn't cause a problem in the challenge).