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Python Introducing Lists Build an Application Multidimensional Musical Groups

james mchugh
james mchugh
6,234 Points
Posted by james mchugh
james mchugh
6,234 Points

I can't print specific data in the list

Stuck on this for a while I can't print specific data types in the list.

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 members in musical_groups:
    print(", ".join(members))

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

1 Answer

Daniel Turato
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PLUS
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Daniel Turato
Java Web Development Techdegree Graduate 30,124 Points
Daniel Turato
.a{fill-rule:evenodd;}techdegree seal-36
Daniel Turato
Java Web Development Techdegree Graduate 30,124 Points

Here's what I got, this should work:

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

What I do is first loop through every group in the 2D array. Then I check to see if the length of the group is equal to 3, if it is then I print all the members using the join method. Hope this helps.

james mchugh
james mchugh
6,234 Points
james mchugh
james mchugh
6,234 Points

Ah ha! The len method. I completely forgot about that. Thanks Daniel!