[Python-Dev] Python 3.4 change in importlib/__init__.py breaking cxFreeze?

[Brett Cannon]

On Mon Mar 10 2014 at 11:41:27 AM, Jurko Gospodnetić <
jurko.gospodnetic at pke.hr> wrote:

>    Hi Nick.
>
> On 10.3.2014. 14:25, Nick Coghlan wrote:> What is supposed to happen
> when that code gets loaded from a ZIP archive?
>  >
>  > __file__ is expected to always be set (including when loaded from a
>  > zipfile - in that case it's the zipfile name concatenated with the
>  > path within the zip file). If it isn't set, there's a buggy loader
>  > involved somewhere that isn't setting it properly.
>
>    I don't recall seeing that ever explicitly stated. For that matter,
> Python 3.4.0rc3 documentation explicitly states:
>
>  > __file__ is optional. If set, this attribute’s value must be a string.
>  > The import system may opt to leave __file__ unset if it has no
>  > semantic meaning (e.g. a module loaded from a database).
>
>    and:
>
>  > Ultimately, the loader is what makes use of __file__ and/or __cached__.
>
>    Or is this some rule specific to the importlib/__init__.py stdlib
> module?
>

No, Nick was mistaken and Barry's response is accurate: __file__ is
optional and left off when it doesn't make any sense. Since
importlib._bootstrap is a frozen module by default it doesn't have __file__
set.

-Brett


>
>    As I recall, I first learned that not all loaded modules need to have
> their __file__ attribute set by researching a failure in some package
> when installed as a zipped-egg using setuptools. Admittedly though, that
> was some old setuptools version.
>
>    Best regards,
>      Jurko Gospodnetić
>
> _______________________________________________
> Python-Dev mailing list
> Python-Dev at python.org
> https://mail.python.org/mailman/listinfo/python-dev
> Unsubscribe: https://mail.python.org/mailman/options/python-dev/
> brett%40python.org
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-dev/attachments/20140310/a985c018/attachment-0001.html>