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.


Han Li
.a{fill-rule:evenodd;}techdegree seal-36
Han Li
Python Web Development Techdegree Graduate 14,817 Points

Replacing or deleting items in list using slices


I understand lists are mutable. And slices get a copy of original list. In the following code, list and sliced_list are different.

list = [1, 2, 3, 4, 5] sliced_list = list[::-1]

So, I don't understand about replacing or deleting items in list using slices. Slices are copy of list, replacing or deleting slices can't affect original list, i think.

Could you explain about this?

Thanks, Ross

1 Answer

Steven Parker
Steven Parker
221,070 Points

You're right, modifying "sliced_list" should not affect "list".

If you saw something that caused a doubt, please show the exact steps needed to reproduce it.