On 11/6/2008 1:45 PM, IRLStephen wrote:
> Hi,
> 
> I have a python application which I am compiling to exe with
> pyinstaller. The application has a facility that allows the user to
> execute other python scripts from a gui. The app uses the
> subprocess.Popen() function to execute the python files in a new
> process.
> 
> My problem is that on one winPC, if I run a .py file which prints out
> os.name, I see 'nt'. However, if I run my application on another winPC
> (which does not have any installation of python) and then run the
> same .py file, the os.name is 'posix'
> 
> Can someone explain why this might be. Its causing me a big issues,
> because python scripts that try to import non-system modules can't
> find them on the second PC, but they work fine on the first PC. (the
> modules are in the same directory as the application)
> 
> This seems to be down to the sys.path being incorrect on the PC thats
> reporting its platform as 'posix'. i.e. the sys.path includes /path/to/
> application, but because its posix, it should be /cygwin/c/path/to/
> application

I don't have any direct experience with PyInstaller and cygwin. I see 
that "os.name" is being set within os.py, and it uses a heuristic based 
on sys.builtin_module_names. Specifically, if it finds the builtin 
module "posix", it sets os.name = "posix"; if it finds the builtin 
module "nt", it sets os.name = "nt".

So my guess is that Popen() is invoking a different interpret than those 
you are expecting. Can you show us your Popen() line? Do you use 
shell=True or shell=False? You should investigate on what Python version 
is being run. Priting sys.executable and sys.version at the beginning of 
your scripts might get you on track.
-- 
Giovanni Bajo
Develer S.r.l.
http://www.develer.com

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