python + rspec?

gistfile1.py

class CalculatorDescription(Description):

    def before(self):
       self.calc = Calculator()
    
    def it_adds_two_numbers(self):
        expect(self.calc.add(2,4)).to_be(6)
    
    @description('division')
    def it_divides_two_numbers(self):
        expect(test.calc.divide(8, 4)).to_be(2)
    
    @description('division')
    def it_doesnt_divide_by_zero(self):
        with expect.raises(ZeroDivisionError):
            self.calc.divide(8, 0)

    def it_multiplies_two_numbers(self):
        expect(test.calc.divide(2, 3)).to_be(6)

-----

with describe(Calculator):
    def before(self):
       self.calc = Calculator()
    
    def it_adds_two_numbers(self):
        expect(self.calc.add(2,4)).to_be(6)

    with describe('division'):
        def it_divides_two_numbers(self):
            expect(test.calc.divide(8, 4)).to_be(2)

        def it_doesnt_divide_by_zero(self):
            with expect.raises(ZeroDivisionError):
                self.calc.divide(8, 0)

    def it_multiplies_two_numbers(self):
        expect(test.calc.divide(2, 3)).to_be(6)


-----

with describe(Calculator) as it:
    @it.before
    def before(test):
        test.calc = Calculator()

    with it("adds two numbers") as test:
        test.assertEqual(test.calc.add(2, 4), 6)

    with it("divides two numbers") as test:
        test.assertEqual(test.calc.divide(8, 4), 2)

    with it("doesn't divide by zero") as test:
        with test.assertRaises(ZeroDivisionError):
            test.calc.divide(8, 0)

    with it("multiplies two numbers") as test:
        test.assertEqual(test.calc.multiply(2, 3), 6)