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Python Introducing Lists Build an Application Multidimensional Musical Groups

gurveer aulakh
gurveer aulakh
2,800 Points

multidimensional musical quiz help!!

PLs, help me solve this problem. I ran out of all the possibilities. pls, help y'all.

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

2 Answers

Johannes Scribante
Johannes Scribante
19,175 Points

Gurveer, if you look at your code and you go through it systematically, what is your code saying?

for group in musical_groups:

Loop through each item in musical groups. That would give us being through each iteration of the loop

    > ["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"]

Each item is therefore a list on its own.
Then you are saying

print(", ".join(group))

Now that we are currently looking at all of the lists in musical_groups, we will be printing the following

    > "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"

Only after you have printed all your lists (and nicely formatted) are you checking the condition to see if a group only contains 3 items.

That is where Henrik Christensen was trying to guide you.

# loop through musical_group
    # condition to check if group has 3 items
        # then print the formatted group
gurveer aulakh
gurveer aulakh
2,800 Points

that what I did. I have a loop then if statement and after that print statement.

Henrik Christensen
Henrik Christensen
Python Web Development Techdegree Student 38,322 Points

No, it's not what you're doing

# loop here
for group in musical_groups:
    # if group has 3 members
    if len(group) == 3:
        # print that group
        print(', '.join(group))