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

Zachary Radcliff
Zachary Radcliff
3,986 Points

Can someone tell me why this is pulling a list bigger than 3?

Any help is much appreciated!

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 here
for item in musical_groups:
    print(", ".join(item))
    if len(item) == 3:

1 Answer

Rohald van Merode
Rohald van Merode
Treehouse Staff

Hey Zachary Radcliff 👋

You're currently printing the items twice, once before your conditional and again if the length of the list is indeed 3. You'll want to swap things around a little bit by moving the first print function call inside the conditional and deleting the other one. This way the names will still be joined together with a , but only be printed when the length is 3:

for item in musical_groups:
    if len(item) == 3:
        print(", ".join(item))

Hope this clears things up! 😄