def test_identity_matrix(self):
a = Matrix([
[0, 1, 2, 4],
[1, 2, 4, 8],
[2, 4, 8, 16],
[4, 8, 16, 32]
])
self.assertEqual(Matrix.identity() * a, a)
def test_transpose_identity(self):
self.assertEqual(Matrix.identity().transpose(), Matrix.identity())