[ubuntu/raring-proposed] python-apt 0.8.8ubuntu5 (Accepted)

[Barry Warsaw]

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On Nov 20, 2012, at 11:05 AM, Martin Pitt wrote:

>python-apt (0.8.8ubuntu5) raring; urgency=low
>
>  * tests/*.py: Do not prepend None to sys.path, Python 3.3 redeems that with
>    an unintelligible crash.

When you do this, you get a chained traceback, which does somewhat make sense
if you understand how Python's import system work at the level of quantum
particles[1]. :)

In Python 3.2, non-string/bytes entries on sys.path are essentially ignored I
believe.  They should probably also be ignored in 3.3, but aren't so what
you're seeing is a traceback in the zipimporter constructor, which by default
is the first importer on sys.path_hooks.  The logic is considerably different
between 3.3 and 3.2 since the former now uses the all-Python importlib
implementation, while the latter used a C implementation of the import
system.

The bottom line is that you shouldn't put None on sys.path, but I think it's a
bug that you get the traceback.  It's definitely a change in behavior.
Upstream bug tracker issue for those who are interested:

http://bugs.python.org/issue16514

Cheers,
- -Barry

[1] http://docs.python.org/3/reference/import.html
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