How to use the aiomultiprocess.set_context function in aiomultiprocess

def setUp(self):
        amp.set_context("spawn")

async def test_spawn_context(self):
        with self.assertRaises(ValueError):
            amp.set_context("foo")

        async def inline(x):
            return x

        amp.set_context("spawn")

        with self.assertRaises(AttributeError):
            p = amp.Worker(target=inline, args=(1,), name="test_inline")
            p.start()
            await p.join()

        p = amp.Worker(target=two, name="test_global")
        p.start()
        await p.join()

        values = list(range(10))

async def test_spawn_context(self):
        with self.assertRaises(ValueError):
            amp.set_context("foo")

        async def inline(x):
            return x

        amp.set_context("spawn")

        with self.assertRaises(AttributeError):
            p = amp.Worker(target=inline, args=(1,), name="test_inline")
            p.start()
            await p.join()

        p = amp.Worker(target=two, name="test_global")
        p.start()
        await p.join()

        values = list(range(10))
        results = [await mapper(i) for i in values]
        async with amp.Pool(2) as pool:
            self.assertEqual(await pool.map(mapper, values), results)

        self.assertEqual(p.result, 2)