Python - How to sort multidimensional list to two-dimensional list?

Question

How i can sort multidimensional list to two-dimensional list?

Multidimensional input: [8, [6, 7, [-1], [4, [[10]]], 2], 1]

Desired two-dimension

Answer 1

The idea is basically the same that the one in @TerryA answer, but using setdefault and checking at the end of the for loop if something of the depth was added:

lst = [8, [6, 7, [-1], [4, [[10]]], 2], 1]


def depths(l):
    def flatten(l, start=0, depth={}):

        for e in l:
            if isinstance(e, list):
                flatten(e, start=start + 1, depth=depth)
            else:
                depth.setdefault(start, []).append(e)
         if start not in depth:
            depth[start] = []

    d = {}
    flatten(l, depth=d)

    return [d[i] for i in range(max(d) + 1)]


result = depths(lst)
print(result)

Output

[[8, 1], [6, 7, 2], [-1, 4], [], [10]]