Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

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

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
230,248 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.