def test_no_eigenvalues(self):
# Module B3 Page 20, Example 2.1 b
m = Matrix([[-2, 7], [-1, 3]])
eigenvals = matrix_eigenvalues(m)
self.assertIsNone(eigenvals)
def test_real_eigenvalues(self):
# Module B3 Page 20, Example 2.1 a
m = Matrix([[2, 1], [3, 4]])
eigenvals = matrix_eigenvalues(m)
self.assertEqual(eigenvals[0], 1)
self.assertEqual(eigenvals[1], 5)
