[Python] how can I add new LD path in python?

import ctypes.util
import importlib.util
import os
lib_dir=... # some local installed clibs
os.environ["LD_LIBRARY_PATH"] = lib_dir + ":" + os.environ.get("LD_LIBRARY_PATH", "")
os.environ["PATH"] = lib_dir + ":" + os.environ.get("PATH", "")

import ctypes

print(ctypes.util.find_library("xx"))
libxx = ctypes.cdll.LoadLibrary("libxx.so")
print(get_library_path(libxx))


Here the environ change does not affect the ctypes at all, unless I add them to LD path before I start the python interpreter, this is very annoying, basically prevent us to add new libs during instance running.

In windows there is add_dll_directory, but how can I do this in linux?

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