Rewriting __getattr__

[kost BebiX]

You're absolutely right! Now try to do except Keyerror: raise AttributeError and it will also fail. But why?

07.01.2011, 15:45, "Jean-Michel Pichavant" <jeanmichel at sequans.com>:
> kost BebiX wrote:
>
>>  Hi everyone!
>>  I just saw a bug (?) in bson.dbref:DBRef.__getattr__
>>
>>  Here's they're code:
>>      def __getattr__(self, key):
>>          return self.__kwargs[key]
>>
>>  And when you do copy.deepcopy on that object it will raise you KeyError. So here's a small piece of code that reproduces the problem:
>
> from http://docs.python.org/reference/datamodel.html
>
> About __getattr__
> "This method should return the (computed) attribute value or raise an
> AttributeError
> <http://docs.python.org/library/exceptions.html#exceptions.AttributeError>
> exception."
>
> The code you provided raises a KeyError thus methods such as 'getattr'
> will fail as they expect an AttributeError exception.
>
> JM
>
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