How to print each list in a lost separate by space?

Question

For example list is L = [[1,2],[2,3],[3,4]] I want to print like

1 2
2 3
3 4

Answer 1

Try this:

for i in L:
    for j in i:
        print(j, end=" ")
    print()

Answer 2

Use a for loop and indexing:

>>> L = [[1, 2], [2, 3], [3, 4]]
>>> for i in L:
...     print(i[0], i[1])
...
1 2
2 3
3 4