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) Lists Combining Lists

I can't seem to figure out why task 1 is no longer passing

Not sure how to change my code so that task 1 is passing

best = ['cat', 'dog', 'mouse']
best.append('rat', 'lizard')

1 Answer

Tadeáš Firich
Tadeáš Firich
7,866 Points

Hello nicole, I solved your problem. The problem is with missing [] in the extend method. You can type something like this:

best = ['My','name','is']
new = ['Super','Man']

Or you can type simply this code:

best = ['My','name','is']

Why is task 1 is no longer passing i really don't know. Maybye the missing brackets in the extend method makes and error.

Was it helpful for you?