This isn't hugely surprising, but doesn't seem to be documented. Is it a bug,
or worth raising as one, or have I misunderstood?
Python 3.2 (r32:88445, Feb 27 2011, 13:00:05)
[GCC 4.5.0 20100604 [gcc-4_5-branch revision 160292]] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> from abc import ABCMeta
>>> class RootException(Exception,metaclass=ABCMeta): pass
...
>>> class MyException(Exception): pass
...
>>> RootException.register(MyException)
>>> try:
... raise MyException
... except RootException:
... print('caught')
...
Traceback (most recent call last):
File "<stdin>", line 2, in <module>
__main__.MyException
If you assume that the ABC "register" class should work likeinheritance (as it
does with issubclass and isinstance then you would, I think, have expected the
exception above to have been caught.
Andrew
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