[Python-Dev] slots and default values (original) (raw)

Delaney, Timothy C (Timothy) tdelaney@avaya.com
Wed, 14 May 2003 07:42:51 +1000

From: Guido van Rossum [mailto:guido@python.org] =20 > I would prefer to think of this is a useful feature rather than a > wart. Finally we can have true constants! =20 Yuck. If you want that, define a property-like class that doesn't allow setting. =20 These "constants" of yours are easily subverted by defining a subclass which adds an instance dict (any subclass that doesn't define slots of its own does this).

Sorry - missing smiley there ;)

But see my other post for a potentially useful side-effect of this. Not = something I think should be done, but fun to think about.

The idea is that you shouldn't be able to create a subclass without some = really nasty work, as the only way to get it is to determine what module = the module subclass is defined in, then grab the class out of that.

But it's a horrible hack and I should never have suggested it ;)

Tim Delaney