On Wed, 05 Sep 2007 11:01:56 +0200, Alexandre Badez <[EMAIL PROTECTED]> wrote:
> Hye, > > I'm developing a little app, and I want to make multi heritage. > My problem is that my both parent do have __slots__ define. > > So I've got something like: > > class foo(object): > __slots__ = ['a', 'b'] > pass > > class foo2(object): > __slots__ = ['c', 'd'] > pass > > class crash(foo, foo2): > pass > > If you write only that in a sample file or in python console (as I > did), python refuse to load the module and report something like: > > Traceback (most recent call last): > File "<stdin>", line 1, in ? > TypeError: Error when calling the metaclass bases > multiple bases have instance lay-out conflict > > Do you know why it append? And how could I make this work? See http://mail.python.org/pipermail/python-list/2006-December/418768.html Basically, the general advice you're likely to get here is: don't use __slots__, or at least don't use __slots__ with inheritance. BTW, what are you trying to do? Is it really a memory footprint optimization, which is the intended use case for __slots__, or are you just doing Java in Python? -- python -c "print ''.join([chr(154 - ord(c)) for c in 'U(17zX(%,5.zmz5(17l8(%,5.Z*(93-965$l7+-'])" -- http://mail.python.org/mailman/listinfo/python-list
