How to iterate over a list of lists and print items of each list as a comma-delimited string

Question

If I have a list of lists:

x = [['1','2','3'],['4','5','6'],['7','8','9']]

How do I iterate over these lists and print them to get the following output?

1, 2, 3
4, 5, 6
7, 8, 9

Answer 1

Try this:

for l in x:
    print ', '.join(map(str, l))

Output:

1, 2, 3
4, 5, 6
7, 8, 9

Answer 2

You pretty much have it:

# python
x = [['1','2','3'],['4','5','6'],['7','8','9']]

for i in x:
  print i[0]
1
4
7

for i in x:
  print i
['1', '2', '3']
['4', '5', '6']
['7', '8', '9']

for i in x[0]:
  print i
1
2
3