On 14 Dec 2006 05:23:33 -0800, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote: > Hi all, > >From the google search, it seems its not possible to do the following. > > >>> class Test1(object): > ... __slots__ = ['a'] > ... > >>> class Test2(object): > ... __slots__ = ['b'] > ... > >>> class Test3(Test1,Test2): > ... __slots__ = ['c'] > ... > Traceback (most recent call last): > File "<stdin>", line 1, in <module> > TypeError: Error when calling the metaclass bases > multiple bases have instance lay-out conflict > > I just want to make sure that I am using only the attributes a,b and c > from the instances of Test3 . Is there any other hack that could be > done.
Difficulty with subclassing is the price you pay for abusing slots. Slots are intended as a performance tweak only, to minimise the memory footprint of classes of which you are going to have a great number of instances. In short - don't do that. -- Cheers, Simon B [EMAIL PROTECTED] http://www.brunningonline.net/simon/blog/ -- http://mail.python.org/mailman/listinfo/python-list
