New submission from Jon Obermark:
If they are not going to call the __metaclass__ or the class __new__, then they
should return `set` objects instead of subclass objects, so that it is clear
what is going on.
As it is, the results of set operations receive some subclass information but
not
Jon Obermark added the comment:
The closing author is correct, the use case is adequately covered by __init__,
and that has been fixed in 3. It makes sense this will not be backported.
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Python tracker
<http://bugs.python.org/issue15
