>>> np.unravel_index([22, 41, 37], (7,6))
(array([3, 6, 6]), array([4, 5, 1]))
[ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16,
17, 18, 19, 20, 21, *22*, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33,
34, 35, 36, *37*, 38, 39, 40, *41*]
[[ 0, 1, 2, 3, 4, 5],
[ 6, 7, 8, 9, 10, 11],
[12, 13, 14, 15, 16, 17],
[18, 19, 20, 21, *22*, 23], <- (3, 4)
[24, 25, 26, 27, 28, 29],
[30, 31, 32, 33, 34, 35],
[36, *37*, 38, 39, 40, *41*]]
(6, 1) (6,5)