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Including Python Modules
Note that on Windows since Blender 2.5 Alpha 0 below directions, including the next section, are no longer necessary. Everything is ready in BF_INSTALLDIR

Python modules are a mixture of .py files and compiled modules (.so files on linux)

This means copying /usr/lib/python3.1 into some directory blender can be bundled with eg. ~/.blender/python (from C:\Python31\Lib on windows)

Note that blender won't start unless these modules are found (error below), so it's important to get this path right.

Fatal Python error: Py_Initialize: can't initialize sys standard streams
ImportError: No module named encodings.utf_8
Python then needs to know to use this path for the modules rather than /usr/lib/python3.1 There are a number of ways to do this....

Define our own Py_GetPath() that overrides pythons. See http://docs.python.org/c-api/init.html
Set the PYTHONPATH and PYTHONHOME (from C) before initializing python.
Start with a shell script that sets the PYTHONPATH/PYTHONHOME (all except win32).