> When you say "class vars", do you mean variables which hold classes?
You guessed correctly, and thanks for pointing out the ambiguity in my references. > The one doesn't follow from the other. Writing decorators as classes is > fairly unusual. Normally, they will be regular functions. I see, this I didn't know. I'll stick to this guideline now. > A more complicated case is where you need to do some pre-processing, and > you *don't* want that calculation repeated every time the method is > called. Decorators are fantastic for that case too, but here you cannot > access instance attributes, since the instance doesn't exist yet. But you > can access *class attributes*, as more-or-less ordinary local variables > *inside* the class definition. Here's a working sketch of the sort of > thing you can do. Copy and paste the following into a Python interactive > session, and then see if you can follow what is being done when. > Is your mind boggled yet? :-) Steven, That was some of the coolest stuff I have seen a while. I had to wait until I had enough time to actually run this through and utilize it my own work. I haven't enjoyed Python this much since I first started using it. Can't thank you enough for the time and thorough example, that imparted loads of insight. jlc -- http://mail.python.org/mailman/listinfo/python-list
