DNS servers in Python - which ones are a good base for work?

[Jean-Paul Calderone]

On Tue, 11 Dec 2007 11:10:52 -0800, John Nagle <nagle at animats.com> wrote:
>   I need to do a non-standard DNS server in Python.  This
>is for a spam blacklist type DNS server, not for IP lookup.
>"dnspython" seems to be client side only.  Oak DNS is
>deprecated.  Suggestions?
>

There's Twisted Names.  I wrote a custom DNS server with it just last week.
The documentation is a bit sparse, but it's not particularly complicated.

Jean-Paul