Re: [Python-Dev] compatibility for C-accelerated types

[Serhiy Storchaka]

On 18.10.15 01:20, Eric Snow wrote:

On the tracker he notes another OrderedDict compatibility break:

     Backward compatibility related to __class__ assignment was
     already broken in C implementation. In 3.4 following code
     works:

     >>> from collections import *
     >>> class foo(OrderedDict):
     ...     def bark(self): return "spam"
     ...
     >>> class bar(OrderedDict):
     ...     pass
     ...
     >>> od = bar()
     >>> od.__class__ = foo
     >>> od.bark()
     'spam'

     In 3.5 it doesn't.

Sorry, I was mistaken with this example. It works in 3.5.


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