human
I wrote the below code

    class TestModel(Model, ):
        inputs = ()
        outputs = (u'y',)
        a = Parameter()
        @staticmethod
        def evaluate(a):
            return a
    m = TestModel(1)
    assert (m.a == 1)
    assert (m() == 1)
    m = TestModel([1, 2, 3], model_set_axis=False)
    assert (len(m) == 1)
    assert np.all((m() == [1, 2, 3]))
    m = TestModel(a=[1, 2, 3], model_set_axis=0)
    assert (len(m) == 3)
    assert np.all((m() == [1, 2, 3]))
    m = TestModel(a=[[1, 2, 3], [4, 5, 6]], model_set_axis=0)
    assert (len(m) == 2)
    assert np.all((m() == [[1, 2, 3], [4, 5, 6]]))

What's a good function header?
 Here's a good function header?
assistant
#Here's a good function header.

def test_inputless_model():