List all contiguous sub-arrays

Question

I have an array [1, 2, 3] of integer and I need to return all the possible combination of contiguous sub-arrays of this array.

[[1],[2],[3],[1,2],

Answer 1

def kwindow(L, k):
    for i in range(len(L)-k+1):
        yield L[i:i+k]


def getAllWindows(L):
    for w in range(1, len(L)+1):
        yield from kwindow(L, w)

Ouput:

In [39]: for i in getAllWindows([1,2,3]): print(i)
[1]
[2]
[3]
[1, 2]
[2, 3]
[1, 2, 3]