Python pipeline示例

示例#1

def test_pipeline_works():
    fn: Callable[[int], Option[int]] = lambda x: Some(x * 10)
    gn: Callable[[int], Option[int]] = lambda x: Some(x + 10)

    hn = pipeline(
        fn,
        gn,
    )

    assert hn(42) == Some(430)

示例#2

def test_pipeline_error():
    fn: Callable[[int], Option[int]] = lambda x: Some(x * 10)
    gn: Callable[[int], Option[int]] = lambda x: Nothing

    hn = pipeline(
        fn,
        gn,
    )

    assert hn(42) == Nothing

示例#3

def test_pipeline_none():

    hn = pipeline()

    assert hn(42) == Some(42)