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 Introducing Lists Build an Application Multidimensional Musical Groups

Posted by Thapelo Mokgwaphe
Thapelo Mokgwaphe
5,892 Points

Bummer: AssertionError: 'Ad Rock, MCA, Mike D.' not found in 'Ad Rock , MCA , Mike D.\nJohn Lennon , Paul McCartney

The output is correct, but gives me the AssertionError. what is this error

groups.py 
musical_groups = [
    ["Ad Rock", "MCA", "Mike D."],
    ["John Lennon", "Paul McCartney", "Ringo Starr", "George Harrison"],
    ["Salt", "Peppa", "Spinderella"],
    ["Rivers Cuomo", "Patrick Wilson", "Brian Bell", "Scott Shriner"],
    ["Chuck D.", "Flavor Flav", "Professor Griff", "Khari Winn", "DJ Lord"],
    ["Axl Rose", "Slash", "Duff McKagan", "Steven Adler"],
    ["Run", "DMC", "Jam Master Jay"],
]
# Your code her

for group in musical_groups:
    print(", ".join(group))
    #for elem in group:

1 Answer

KRIS NIKOLAISEN
KRIS NIKOLAISEN
54,971 Points

The code you have on this page will pass task 1. The assertion error doesn't match. That error would show if you included a space before the comma in your join like this:

for group in musical_groups:
    print(" , ".join(group))
Thapelo Mokgwaphe
Thapelo Mokgwaphe
5,892 Points

Thanks, it worked