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In Python 3.11, PyConfig gained astdlib_dir attribute which is, as far as I can tell, supposed to overridesys._stdlib_dir (which is used by importlib). No matter what I set it to or what else I set, however, it seems to be ignored. For example:
#include<Python.h>#include<stdio.h>externwchar_t*_Py_GetStdlibDir(void);intmain(intargc,char**argv){PyStatusstatus;PyConfigconfig;PyConfig_InitPythonConfig(&config);PyConfig_SetString(&config,&config.stdlib_dir,L"/my/stdlib/dir");Py_InitializeFromConfig(&config);if (PyStatus_Exception(status)) {Py_ExitStatusException(status); }PyConfig_Clear(&config);fprintf(stderr,"stdlib_dir = '%ls'\n",_Py_GetStdlibDir());Py_Finalize();}
% gcc -Wall$(/python/3.12-opt/bin/python3-config --cflags) -o testprogram testprogram.c$(/python/3.12-opt/bin/python3-config --ldflags) -lpython3.12# Look ma, no warnings.% ./testprogramstdlib_dir ='/python/3.12-opt/lib/python3.12'
It doesn't seem to matter whetherPyConfig.stdlib_dir is set to an existing directory either (although for my use-case, it must be a non-existant one; we're getting the stdlib from embedded data, and the incorrect setting ofsys._stdlib_dir means importlib'sFrozenImporter sets the wrong__file__ attribute on frozen/deepfrozen modules, likeos.)