Developed a product a few years ago using Twisted, which got left on a shelf due to unavoidable complications at the business level. Client with a license to alter the code asked me to make some changes to it, so I sat down today to rebuild the development environment...

Twisted and Nevow have moved along, the original metaclass I created to bridge between TAL templates and Nevow no longer worked. The interface and adapter mechanisms had moved on and I had to re-learn how they now worked to figure out how to bridge them again.

In the end the new hack is about the same as the old hack, it works, it lets the legacy pages originally coded in TAL continue to work alongside the newer Nevow pages. Now I just need to get the enhancements coded up :) .