CDLL failed to load a dll file with a correct path.

[codingshen]

Bug report

Bug description:

I have a Python project like this:
Project
|---libs
|------dylib.dll
main.py

then, I try to use ctypes to load that:

from ctypes import *
lib = CDLL("libs/dylib.dll")

CRASHED!

Traceback (most recent call last):
  File "...", line 4, in <module>
    spdlog_api = ctypes.CDLL("libs/dylib.dll")
  File "C:\Program Files\WindowsApps\PythonSoftwareFoundation.Python.3.12_3.12.2800.0_x64__qbz5n2kfra8p0\Lib\ctypes\__init__.py", line 379, in __init__
    self._handle = _dlopen(self._name, mode)
FileNotFoundError: Could not find module 'lib/dylib.dll' (or one of its dependencies). Try using the full path with constructor syntax.

all right, lets use os to generate the full path.

os.path.dirname(os.path.abspath(__file__))+"/libs/spdlog-build.dll")

this works on my PC but CRASHED AGAIN ON ANOTHER COMPUTER!
It shows that ctypes can not load full path as well!

right , lets fix it!
then, I found that
NO! Ctypes is written in C so that I can only find the definition in ctypes.pyi

CPython versions tested on:

3.12

Operating systems tested on:

No response

[codingshen]

the project tree:
Project
|---libs
|-----dylib.dll
|---main.py

[picnixz]

os.path.dirname(os.path.abspath(__file__))+"/libs/spdlog-build.dll")

This is not the same as libs/dylib.dll here. Also, I suggest using os.path.join for creating paths instead of + as it handles OS separators as well. Please ask such questions on https://discuss.python.org/c/help/7 or Stackoverflow first.

It shows that ctypes can not load full path as well!

What's the exact traceback?

[emmatyping]

Based on the name C:\Program Files\WindowsApps\PythonSoftwareFoundation.Python.3.12_3.12.2800.0_x64__qbz5n2kfra8p0, it looks like this version of Python is from the Windows Store. I wonder if the Python app cannot see the file because of some capability issue? Though I suppose in that case it would probably be an exception with a PermissionError.