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
Why shouldn't I use extend to add only one item
In the video he said to use append for adding one item to the list and extend for two or more items only. I tried using extend to add just one number to the list and it worked fine. Is there any particular reason to use append? i'm using python 3.6.4 if it matters.
Hi William! I just looked at the video transcript and Kenneth doesn't say don't ever use extend for one item. He said:
So the basic rule, if I want to add a single item to a list, I use append.
Whatever that single item is, append puts a single thing onto the end of my_list.
If I want to add multiple items, then I use extend.
Append for one, extend for two or more.
So, you don't have to use extend only for multiple items. But what he's saying is, this is what extend is made to do and this is what append is made to do. :)
Hope this helps, Nakal