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

Gregorio Bernabel
Gregorio Bernabel
3,412 Points
Posted by Gregorio Bernabel
Gregorio Bernabel
3,412 Points

slices.py..... any tips guys and girls ?

def first_4(cuatro): return cuatro[:4] def first_and_last_4(primerosultimos): return primerosultimos[:4] + primerosultimos[-4:] def odds(raros): return raros[1::2] def reverse_evens(deriversa): return deriversa[-2:1:-2]

slices.py 
def first_4(cuatro):
    return cuatro[:4]
def first_and_last_4(primerosultimos):
    return primerosultimos[:4] + primerosultimos[-4:]
def odds(raros):
    return raros[1::2]
def reverse_evens(deriversa):
    return deriversa[-2:1:-2]

1 Answer

Steven Parker
Steven Parker
231,007 Points
Steven Parker
Steven Parker
231,007 Points

The problem is you don't know how many items the list will have.

So to do this in one slice, you'll have to compute the starting number based on whether the list has an even or odd number of items.

But ... it might be easier to do this using two slices.