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) Lists Creating lists

Sanjay Devadkar
PLUS
Sanjay Devadkar
Courses Plus Student 1,016 Points

What is the window which show once we click preview

What is this below when we click preview panel. "sorry for bad English". Variable Value name main doc None. package None loader <frozen_importlib_external.SourceFileLoader object at 0x7f602d71b550> __spec_ None annotations {} cached None sys traceback
test_in_same_context True create_preview True test_number 1 test_output {} success failure warningregistry {'version': 0, ("unclosed file <_io.TextIOWrapper name='lists.py' mode='r' encoding='UTF-8'>", , 42): True, ("unclosed file <_io.TextIOWrapper name='/usr/local/lib/ruby/gems/2.3.0/gems/challenge_proctor-0.0.0/lib/challenge_proctor/templates/python.html.erb' mode='r' encoding='UTF-8'>", , 116): True} my_list [1, 2, 3, 'AA', 'BB']