Mike Meyer wrote: > Note that this property of __slots__ is an implementation detail. You > can't rely on it working in the future.
I don't "rely" on it. I just want to catch bugs in my code. > I'm curious as to why you care if people add attributes to your > "immutable" class. Personally, I consider that instances of types > don't let me add attributes to be a wart. To catch stupid bugs, typos and whatnot. If an instance is immutable, you can't modify it, period. If you do it, it's a bug. So why not have the bug raises an exception, rather than go unnoticed? I don't see your point, either. Why would you want to add attributes to an object documented to be immutable? -- Giovanni Bajo -- http://mail.python.org/mailman/listinfo/python-list