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 Introducing Lists Build an Application Multidimensional Musical Groups

DONT know where to start? Please help

Help, not sure where to start.

please can you help and provide the answers?

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

1 Answer

Steven Parker
Steven Parker
221,070 Points

There are clues right in the instructions: "Can you loop through each group and output the members join‍ed together with a ", " comma space as a separator, please?"


  • you'll need a loop (a "for" would be a good choice)
  • you will use the "join" function to combine list members
  • the "join" will use ", " for the separator
  • you'll use a "print" statement to output the results

See how close you can get, and write again if you need more help (be sure to include the code you have so far).