How to remove the innermost level of nesting in a list of lists of varying lengths

Question

I\'m trying to remove the innermost nesting in a list of lists of single element length lists. Do you know a relatively easy way (converting to NumPy arrays is fine) to get

Answer 1

How about np.squeeze?

Remove single-dimensional entries from the shape of an array.

arr = [ [ [1],[2],[3],[4], [5] ], [ [6],[7],[8] ] , [ [11],[12] ] ]
>>> arr
[[[1], [2], [3], [4], [5]], [[6], [7], [8]], [[11], [12]]]
>>> [np.squeeze(i) for i in arr]
[array([1, 2, 3, 4, 5]), array([6, 7, 8]), array([11, 12])]

Not necessarily the innermost (ie independent of how many dimensions) dimension though. But your question specifies "list of lists"