Best way to control assignment to attribute?

[Aahz]

In article <XF9Ub.175053$6y6.3406052 at bgtnsc05-news.ops.worldnet.att.net>,
wes weston  <wweston at att.net> wrote:
>Frank Millman wrote:
>> 
>> I want to control the assignment of a value to an attribute. Instead
>> of allowing it to be changed directly, I want to enforce that a method
>> is called, which will perform the assignment subject to various
>> checks.
> 
>    See __slots__; not sure if there's a newer/better way.

You should be certain before even thinking of suggesting __slots__.
__slots__ is intended only to save memory; there are many problems with
using it if you don't know what you're doing.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"The joy of coding Python should be in seeing short, concise, readable
classes that express a lot of action in a small amount of clear code -- 
not in reams of trivial code that bores the reader to death."  --GvR