Function initializePython2

Global/PythonUtils.cpp:242–432

PyObject* initializePython3(const std::vector<wchar_t*>& commandLineArgsWide)
#else
PyObject* initializePython2(const std::vector<char*>& commandLineArgsUtf8)
#endif
{
    //See https://developer.blender.org/T31507
    //Python will not load anything in site-packages if this is set
    //We are sure that nothing in system wide site-packages is loaded, for instance on OS X with Python installed
    //through macports on the system, the following printf show the following:

    /*Py_GetProgramName is /Applications/Natron.app/Contents/MacOS/Natron
     Py_GetPrefix is /Applications/Natron.app/Contents/MacOS/../Frameworks/Python.framework/Versions/2.7
     Py_GetExecPrefix is /Applications/Natron.app/Contents/MacOS/../Frameworks/Python.framework/Versions/2.7
     Py_GetProgramFullPath is /Applications/Natron.app/Contents/MacOS/Natron
     Py_GetPath is /Applications/Natron.app/Contents/MacOS/../Frameworks/Python.framework/Versions/2.7/lib/python2.7:/Applications/Natron.app/Contents/MacOS/../Plugins:/Applications/Natron.app/Contents/MacOS/../Frameworks/Python.framework/Versions/2.7/lib/python27.zip:/Applications/Natron.app/Contents/MacOS/../Frameworks/Python.framework/Versions/2.7/lib/python2.7/:/Applications/Natron.app/Contents/MacOS/../Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-darwin:/Applications/Natron.app/Contents/MacOS/../Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-mac:/Applications/Natron.app/Contents/MacOS/../Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-mac/lib-scriptpackages:/Applications/Natron.app/Contents/MacOS/../Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-tk:/Applications/Natron.app/Contents/MacOS/../Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-old:/Applications/Natron.app/Contents/MacOS/../Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-dynload
     Py_GetPythonHome is ../Frameworks/Python.framework/Versions/2.7/lib
     Python library is in /Applications/Natron.app/Contents/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages*/

    //Py_NoSiteFlag = 1;

    /////////////////////////////////////////
    // Py_SetProgramName
    /////////////////////////////////////////
    //
    // Must be done before Py_Initialize (see doc of Py_Initialize)
    //

#if PY_MAJOR_VERSION >= 3
    // Python 3
    Py_SetProgramName(commandLineArgsWide[0]);
#else
    // Python 2
    printf( "Py_SetProgramName(\"%s\")\n", commandLineArgsUtf8[0] );
    Py_SetProgramName(commandLineArgsUtf8[0]);
#endif

    /////////////////////////////////////////
    // Py_Initialize
    /////////////////////////////////////////
    //
    // Initialize the Python interpreter. In an application embedding Python, this should be called before using any other Python/C API functions; with the exception of Py_SetProgramName(), Py_SetPythonHome() and Py_SetPath().
#if defined(NATRON_CONFIG_SNAPSHOT) || defined(DEBUG)
    printf("Py_Initialize()\n");
#endif
    Py_Initialize();
    // pythonHome must be const, so that the c_str() pointer is never invalidated

#if PY_MAJOR_VERSION >= 3
    // Py_SetPath clears sys.prefix and sys.exec_prefix
    // https://github.com/NatronGitHub/Natron/issues/696
    PyObject *prefix = PyUnicode_FromWideChar(Py_GetPythonHome(), -1);
    PySys_SetObject(const_cast<char*>("prefix"), prefix);
    Py_XDECREF(prefix);
    PyObject *exec_prefix = PyUnicode_FromWideChar(Py_GetPythonHome(), -1);
    PySys_SetObject(const_cast<char*>("exec_prefix"), exec_prefix);
    Py_XDECREF(exec_prefix);
#endif

    /////////////////////////////////////////
    // PySys_SetArgv