human
I wrote the below code

    class x(object, ):
        def f(self):
            pass
    def f(self):
        return self
    AreEqual(type(x.f)(f, None, (int, str))(42), 42)
    AreEqual(type(x.f)(f, None, (int, str))('abc'), 'abc')
    AssertError(TypeError, type(x.f)(f, None, (int, str)), 1L)

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

def test_method_tuple_type():