Lists

Question

Do I use .join method and (for and in) if so how
```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"],
]
```

Philip Schultz · Accepted Answer

Hey Taurai, Task 1 of 2 is asking you to combine the members of all the groups. Since this is a multidimensional list you first have to access the groups to get to the members. So, you need a for loop that loops through each group, then you can use the join method to combine each member of all of the groups. See the code below and let me know if you have any questions.
python
all_members = ''
for group in musical_groups:
    print(", ".join(group))

For task 2 0f 2, it wants you to only print the members of the groups that have a total of 3 members. You can do this by adding an if statement that checks the length of each group. See the code below and let me know if you have any questions.
python
all_members = ''
for group in musical_groups:
    if len(group) == 3:
        print(", ".join(group))

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Taurai Mashozhera

Taurai Mashozhera

Lists

1 Answer

Philip Schultz

Philip Schultz