 Générer un code pour effectuer une transposition de matrice.
 Matrice A de taille 2x3 :\nA = [[1, 2, 3],\n [4, 5, 6]]
 def transpose(A):\nm = len(A)\nn = len(A[0])\n AT = [[0] * m for _ in range(n)]\n \n for i in range( m):\n for j in range(n):\n AT[j][i] = A[i][j]\n return AT