[Python-Dev] Non-string keys in type dict

[Ethan Furman]

PJ Eby wrote:
> Short version: AddOns are things you can use to dynamically extend 
> instances -- a bit like the "decorator" in "decorator pattern" (not to 
> be confused with Python decorators).  Rather than synthesize a unique 
> string as a dictionary key, I just used the AddOn classes themselves as 
> keys.  This works fine for object instances, but gets hairy once classes 
> come into play.

Are you able to modify classes after class creation in Python 3? 
Without using a metaclass?

~Ethan~