Python init Matrix
matrix = [ [ 0 for i in range(n) ] for j in range(m) ]
Fair Fly
matrix = [ [ 0 for i in range(n) ] for j in range(m) ]>>> A = np.array([[4,7,6],[1,2,5],[9,3,8]])
>>> A
array([[4, 7, 6],
[1, 2, 5],
[9, 3, 8]])
>>> A.shape
(3, 3)