[issue18156] Add an 'attr' attribute to AttributeError

[Brett Cannon]

Brett Cannon added the comment:

What Benjamin said.

Adding something like this is mostly about a nicer constructor (``AttributeError(attr='meth')``) and automatically creating the message for the exception (although that would require another argument like 'object' or something to be able to do e.g. "'dict' object has no attribute 'asdfdsff'" or "type object 'dict' has no attribute 'asdfdsf'").

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue18156>
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