I don't understand what they want

Question

I try this code it says it's wrong
for item in musical_groups:
for thing in item:
    print(thing + ",")
```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 item in musical_groups:
for thing in item:
    print(thing + ",")
```

Jassim Alhatem · Answer

First task:
python
for lst in musical_groups:
    print((', ').join(lst))

You're looping through 'musical_groups'  and getting the lists inside. Then you use .join() to create a string from each list. (aka iterable object). Read more about join() (https://www.programiz.com/python-programming/methods/string/join)
Second task:
python
for lst in musical_groups:
    if len(lst) == 3:
        print((', ').join(lst))

You're looping through 'musical_groups' again and checking if the list contains 3 elements.
Hope this helps.

Phil Livermore · Answer

I think they want you to use str.join() and don't forget the space after the comma.
str would be the separator, in this case the comma and space and the parameter for the join method would be each list from the first loop. You only need one for loop.

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jafararifdjanov

jafararifdjanov

No entiendo qué quieren

2 Respuestas

Jassim Alhatem

Jassim Alhatem

Phil Livermore

Phil Livermore