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 Sudhir Raghur Venkatesalu
Sudhir Raghur Venkatesalu
7,347 Points

comma-separated value

Tried this code for comma-separated value. still throws the wrong answer.

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 i in musical_groups: string = ",".join(i) print("{},".format(string))

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
for i in musical_groups:
    string = ",".join(i)
    print("{},".format(string))

2 Answers

KRIS NIKOLAISEN
KRIS NIKOLAISEN
54,972 Points

You have to issues:

1) The task wants you to join with comma space. You are just using a comma.

2) print("{},".format(string)) adds a comma to the end of the string. This is not needed and should be removed

Chris Freeman
Chris Freeman
Treehouse Moderator 68,457 Points
Chris Freeman
Chris Freeman
Treehouse Moderator 68,457 Points

KRIS NIKOLAISEN, you would make a great moderator! You're very helpful on the in the community forum.

Sudhir Raghur Venkatesalu
Sudhir Raghur Venkatesalu
7,347 Points
Sudhir Raghur Venkatesalu
Sudhir Raghur Venkatesalu
7,347 Points

Thanks, it worked:-)