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keith rezendes4,459 Points
multi-dimensional list using join
how to flatten a 2D list using join method?
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 range(len(musical_groups)): for j in range(len(musical_groups[i])): print(musical_groups[i][j] + ',')
Cooper Runstein11,849 Points
What you're attempting may work in a real world situation, but not for the way this practice problem is set up. Also notice that you're printing only a comma, not a comma and a space. Using join is the more pythonic practice, shown below.
for group in musical_groups: #for each group in musical_groups print(', '.join(group)) #print a string created by joining each element in the group
for group in musical_groups: if len(group) == 3: #if and only if the group has 3 members (the list is length 3) print(', '.join(group)) #print the joined string