[Python-Dev] Wrapping up 'dynamic attribute' discussion

I wrote:

I've sent an updated version of PEP 363 to the editors, which includes the following summary of the discussion. I hope I've captured the important points, but please let me know if there's something important I've left out or misrepresented.

There were a couple of points made off-list, which I've incorporated. The final version of the PEP is now with the editors. Ben.