[Python-Dev] _not_found attribute on ImportError (original) (raw)

Nick Coghlan ncoghlan at gmail.com
Mon Feb 11 11:54:26 CET 2013

On Mon, Feb 11, 2013 at 6:08 PM, Chris Withers <chris at simplistix.co.uk> wrote:

Hi All,

I see in Python 3, some ImportErrors have grown a 'notfound' attribute. What's the significance of this attribute and where/how is it added? The only way I can seem to create this attribute is: ex = ImportError ex.notfound = True

It's something importlib does to get fromlists to behave the same way they did in the C implementation.

It is set here: http://hg.python.org/cpython/file/3.3/Lib/importlib/_bootstrap.py To make these pass: http://hg.python.org/cpython/file/3.3/Lib/test/test_importlib/import_/test_fromlist.py

You'd have to ask Brett which specific test is affected, or else you could comment out the line that sets _not_found and see what breaks (you may need to refreeze _frozen_importlib first).

Cheers, Nick.

-- Nick Coghlan | ncoghlan at gmail.com | Brisbane, Australia

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