Welcome to the Treehouse Community

The Treehouse Community is a meeting place for developers, designers, and programmers of all backgrounds and skill levels to get support. Collaborate here on code errors or bugs that you need feedback on, or asking for an extra set of eyes on your latest project. Join thousands of Treehouse students and alumni in the community today. (Note: Only Treehouse students can comment or ask questions, but non-students are welcome to browse our conversations.)

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and a supportive community. Start your free trial today.

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

Leo Marco Corpuz
Leo Marco Corpuz
18,975 Points
Posted by Leo Marco Corpuz
Leo Marco Corpuz
18,975 Points

Returning two sets of numbers from a slice method

How do you use the slice method when you're trying to get more than one set of numbers from a list?

slices.py 
def first_4(numberSet):
    return numberSet[0:4]
def first_and_last4(numberSet):
    return numberSet[[0:4],[-4:0:-1]]

1 Answer

ursaminor
ursaminor
11,271 Points
ursaminor
ursaminor
11,271 Points

You can just add them together. BTW, you can select the first four with [:4] and last four with [-4:].

Set is a special type of collection; I would just call the variable numbers, or nums.

And in Python variable names use snake case, not camel case. https://www.python.org/dev/peps/pep-0008/#naming-conventions

def first_and_last4(nums):
    return nums[:4] + nums[-4:]