Antoon Pardon <[EMAIL PROTECTED]> writes: ...
> >> 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 find it confusing at first, but I do understand what happens :-) > > I understand what happens too, that doesn't make it sane behaviour. > > > But really, what should be done different here? > > I don't care what should be different. But a line with only one > referent to an object in it, shouldn't be referring to two different > objects. It doesn't. > In the line: b.a += 2, the b.a should be refering to the class variable > or the object variable but not both. So either it could raise an > attribute error or add two to the class variable. It does exactly what you say. It adds 2 to the a *instance variable* of the object instance in 'b'. It doesn't touch the *class variable* A.a which is still 1. S. -- http://mail.python.org/mailman/listinfo/python-list
