There are a few ways to set this path from C before starting python

setenv("PYTHONHOME", somepath, 1); or... Py_SetPythonHome(py_path_bundle_wchar);

Heres a function that blender uses to setup python3.1's path, there are a few blender functions here but should still be useful. the #if0's part works too but I preferred to set the home folder directly.

/* must be called before Py_Initialize */ void BPY_start_python_path(void) { char *py_path_bundle= BLI_gethome_folder("python", BLI_GETHOME_ALL);

if(py_path_bundle==NULL)
	return;

/* set the environment path */
printf("found bundled python: %s\n", py_path_bundle);

#if 0 BLI_setenv("PYTHONHOME", py_path_bundle); BLI_setenv("PYTHONPATH", py_path_bundle); #endif

{
	static wchar_t py_path_bundle_wchar[FILE_MAXDIR];

	mbstowcs(py_path_bundle_wchar, py_path_bundle, FILE_MAXDIR);
	Py_SetPythonHome(py_path_bundle_wchar);
}

}

On Tue, Oct 20, 2009 at 8:34 PM, Nathan Osman <george_edison55@hotmail.com> wrote:

Thanks for your help. So if I bundle everything in the Lib directory with the application what function would I call to inform Python where the modules are located before I call Py_Initialize?

Thanks, Nathan

...

Date: Tue, 20 Oct 2009 15:02:54 +0200 From: ideasman42@gmail.com To: capi-sig@python.org Subject: Re: [capi-sig] Couple of Questions About Statically Linking the Interpreter

for python 2.x you can get away only with statically linked library, but then you miss modules like math, struct and os If you want these modules you can compile some of these into the library you can build python with a modified config

-- quick howto -- edit ./Modules/Setup uncomment "#*shared*" around line 152 and rename to "*static*" The following modules are built into libpython2.5.a uncomment: array, math, time, operator, itertools, cStringIO, cPickle, zlib, _struct, _weakref, _random, binascii, collections, fcntl, spwd, grp, select

Or you can bundle python25.zip with your application and include all modules in this, however youll need zlib either compiled statically or include the module unzipped in the dir.

Blender2.49 for example in win32 has python26.zip and zlib.pyd in the current directory so python can extract the zip and open the modules...

As for python 3.x, It cant even start unless it has some external modules

Unless there is some trick I dont know of, youll get this with a static linked py3.1 and no modules...

Fatal Python error: Py_Initialize: can't initialize sys standard streams ImportError: No module named encodings.utf_8

Heres some info I wrote about how to bundle python3.1 with blender.

http://wiki.blender.org/index.php/BlenderDev/Blender2.5/PythonAPI_31

On Tue, Oct 20, 2009 at 9:48 AM, Nathan Osman <george_edison55@hotmail.com> wrote:

...

Im kind of new to the Python/C api and I had a couple q's about the interpreter.

1. If i statically link the libpython31.a library to my app are there any other files i need to include for the end users? Im using Windows, btw.
2. How do you get the interpreter output from the console when you are running within a gui environment? Can it be redirected?

Thanks, George

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