On a smaller scale compared to what I need, here's an example of what I'm looking to do:
>>> a
array([[ 21, 22, 23, 24, 25, 26, 27],
[ 56, 57, 58, 59, 60, 61, 62],
[ 14, 15, 16, 17, 18, 19, 20],
[ 7, 8, 9, 1010, 11, 12, 13],
[ 42, 43, 44, 45, 46, 47, 48],
[ 63, 64, 65, 66, 67, 68, 69],
[ 0, 1, 2, 3, 4, 5, 6],
[ 49, 50, 51, …