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

Ali Al Dairawi
Ali Al Dairawi
1,869 Points
Posted by Ali Al Dairawi
Ali Al Dairawi
1,869 Points

im completely confused here, not sure what they mean by the first group and second. any tips on where i should start.

please?

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 here
Kito Middleton
Kito Middleton
3,340 Points
Kito Middleton
Kito Middleton
3,340 Points

So it's just lists inside of a list right? The 'first group' is a list of all the members of Beastie Boys the 'second group' is The Beatles ect.

Ali Al Dairawi
Ali Al Dairawi
1,869 Points
Ali Al Dairawi
Ali Al Dairawi
1,869 Points

thanks kido middleton good luck.

1 Answer

Steven Parker
Steven Parker
230,274 Points
Steven Parker
Steven Parker
230,274 Points

I think you mean the first and second dimension, where the instructions say "The first dimension is group, the second is group members."

What they mean by "first dimension" is the outer list, the one that holds all the smaller lists of members. Each of its elements is a whole group.

The "second dimension" is the inner lists of just the members of the group.