Python Add.eval示例

示例#1

 def test_xx_3x_2_eval(self):
     x = X()
     f = Add(Add(Mul(x, x), Mul(Number(3), x)), Number(2))
     # f(x) = x**2 + 3x + 2
     self.assertEqual(f.eval(10), 132)

示例#2

 def test_2x_3_eval(self):
     f = Add(Mul(Number(2), X()), Number(3))  # f(x) = 2x + 3
     self.assertEqual(f.eval(10), 23)