how to tell if it's safe to go from new-style to classic class?

Skip Montanaro skip at
Fri Jul 16 18:26:59 CEST 2004

If I have a new-style class what are the restrictions that keep me from
going back to a classic class?  I know use of __slots__, __new__ or the
property() builtin make new-style a requirement.  What other constructs
might the code be using that would prevent me from falling back to use of
classic classes?



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