human
I wrote the below code

    raises(AttributeError, (lambda : ask(Q.my_key(x))))
    class MyAskHandler(AskHandler, ):
        @staticmethod
        def Symbol(expr, assumptions):
            return True
    register_handler('my_key', MyAskHandler)
    assert (ask(Q.my_key(x)) is True)
    assert (ask(Q.my_key((x + 1))) is None)
    remove_handler('my_key', MyAskHandler)
    del Q.my_key
    raises(AttributeError, (lambda : ask(Q.my_key(x))))

What's a good function header?

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

def test_key_extensibility():