On Thu, Jun 5, 2008 at 5:40 AM, Gabriel Rossetti < [EMAIL PROTECTED]> wrote:
> Hello everyone, > > I had read somewhere that it is preferred to use self.__class__.attribute > over ClassName.attribute to access class (aka static) attributes. I had done > this and it seamed to work, until I subclassed a class using this technique > and from there on things started screwing up. I finally tracked it down to > self.__class__.attribute! What was happening is that the child classes each > over-rode the class attribute at their level, and the parent's was never > set, so while I was thinking that I had indeed a class attribute set in the > parent, it was the child's that was set, and every child had it's own > instance! Since it was a locking mechanism, lots of fun to debug... So, I > suggest never using self.__class__.attribute, unless you don't mind it's > children overriding it, but if you want a truly top-level class attribute, > use ClassName.attribute everywhere! > > I wish books and tutorials mentioned this explicitly.... > > Gabriel > -- > http://mail.python.org/mailman/listinfo/python-list > Thanks for the info. Can anyone explain more about the differences between the two techniques? Why does one work and the other one fail? Casey
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