How do I get from this:
a = [[[1, 1], [], [2,2]], [[2,2], [], [1, 1]]]
to this:
a = [[[1,1], [2,2]], [[2,2], [1,1]]]
quickly? I am trying to use a list comprehension but can’t figure it out.
>Solution :
You can use a list comprehension:
a = [[sublst for sublst in lst if sublst] for lst in a]
Otherwise you can use the filter function:
[list(filter(None, lst)) for lst in a]