[Twisted-Python] Why does this simple server not work?

[Jean-Paul Calderone]

On Mon, 13 Nov 2006 11:01:27 -0800, apocalypznow <apocalypznow at gmail.com> wrote:
>The following is run but almost immediately terminates without any errors. 
>WHY?  I used "twistd -noy server.tac".
>Here is the code:

Using Python 2.3.5 with Twisted r18666, when I run it I get an AttributeError.
If I add:

    import twisted.application.internet

Near the top, then it starts up as expected.

Jean-Paul