Class Variable Access and Assignment

[Antoon Pardon]

Op 2005-11-03, Steve Holden schreef <steve at holdenweb.com>:
> Antoon Pardon wrote:
>> Op 2005-11-03, Steven D'Aprano schreef <steve at REMOVETHIScyber.com.au>:
>> 
>> 
>>>>There are two possible fixes, either by prohibiting instance variables
>>>>with the same name as class variables, which would allow any reference
>>>>to an instance of the class assign/read the value of the variable. Or
>>>>to only allow class variables to be accessed via the class name itself.
>>>
>>>There is also a third fix: understand Python's OO model, especially
>>>inheritance, so that normal behaviour no longer surprises you.
>> 
>> 
>> No matter wat the OO model is, I don't think the following code
>> exhibits sane behaviour:
>> 
>> class A:
>>   a = 1
>> 
>> b = A()
>> b.a += 2
>> print b.a
>> print A.a
>> 
>> Which results in
>> 
>> 3
>> 1
>> 
> I don't suppose you'd care to enlighten us on what you'd regard as the 
> superior outcome?

No. I don't think a superior outcome is necessary to see that this is
not sane behaviour. I don't care that much on how it gets fixed.

-- 
Antoon Pardon