human
I wrote the below code

    class x(object, ):
        def set(self, value):
            AssertUnreachable()
        prop = property((lambda x: 42), set)
    x.prop = 42
    AreEqual(x.__dict__['prop'], 42)

What's a good function header?

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

def test_class_assign():