[mod_python] Multi-tier functionality

This might be a little out of left field. Say I wanted to use mod_python in
a mult-tier environment where I have a website that uses mod_python, some
business rules, and a database. I want to minimise the coupling between the
tiers, i.e. I don't want to make database calls directly from my web tier.
What is a good approach for doing this? What is a good mechanism for hosting
business rules?

Ob disclosure: I normally develop in a Windows environment with C# and .Net.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://mm_cfg_has_not_been_edited_to_set_host_domains/pipermail/mod_python/attachments/20051005/143fc809/attachment-0001.html