[Numpy-discussion] a question about freeze on numpy 1.7.0

Benjamin Root ben.root@ou....
Sun Feb 24 19:25:55 CST 2013


On Sun, Feb 24, 2013 at 8:16 PM, Ondřej Čertík <ondrej.certik@gmail.com>wrote:

> Hi Gelin,
>
> On Sun, Feb 24, 2013 at 12:08 AM, Gelin Yan <dynamicgl@gmail.com> wrote:
> > Hi All
> >
> >      When I used numpy 1.7.0 with cx_freeze 4.3.1 on windows, I quickly
> > found out even a simple "import numpy" may lead to program failed with
> > following exception:
> >
> > "AttributeError: 'module' object has no attribute 'sys'
> >
> > After a poking around some codes I noticed /numpy/core/__init__.py has a
> > line 'del sys' at the bottom. After I commented this line, and repacked
> the
> > whole program, It ran fine.
> > I also noticed this 'del sys' didn't exist on numpy 1.6.2
> >
> > I am curious why this 'del sys' should be here and whether it is safe to
> > omit it. Thanks.
>
> The "del sys" line was introduced in the commit:
>
>
> https://github.com/numpy/numpy/commit/4c0576fe9947ef2af8351405e0990cebd83ccbb6
>
> and it seems to me that it is needed so that the numpy.core namespace is
> not
> cluttered by it.
>
> Can you post the full stacktrace of your program (and preferably some
> instructions
> how to reproduce the problem)? It should become clear where the problem is.
>
> Thanks,
> Ondrej
>

I have run into issues with doing "del sys" before, but usually with
respect to my pythonrc file.  Because the import of sys has already
happened, python won't let you import the module again in the same
namespace (in my case, the runtime environment).  I don't know how the
frozen binaries work, but maybe something along those lines is happening?

Ben Root
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