Unable to import module from the shared .pyd built with CMake

[AlanTeixeiraNM]

Hello. I'm trying to build a simple working example of c++/python binding. I'm working on Windows 11. I installed pybind11 just executing pip install pybind11. I have Python 3.12.3, only this version

This is the c++ source (called testing.cpp), just the classical add function
-----------------------------------testing.cpp------------------------------------------------------
`#include <pybind11/pybind11.h>
namespace py = pybind11;

int add(int i, int j) {
return i + j;
}

PYBIND11_MODULE(testing, m) {
m.doc() = "pybind11 example plugin"; // optional module docstring

m.def("add", &add, "A function that adds two numbers");

}----------------------------------testing.cpp--------------------------------------------------------- This source is located at .../Codeprojects/C++_gcc/test`.

I use VS Code on g++ x64 environment. The CMake building configurations are the following

---------------------CMakeLists.txt------------------------------------------------------------------------
cmake_minimum_required(VERSION 3.12.0)
set (CMAKE_CXX_STANDARD 20)

#I had problems using add_subdirectory(pybind11)
set(CMAKE_PREFIX_PATH C: ...\Python\Python312\Lib\site-packages\pybind11\share\cmake)

find_package(Python COMPONENTS Interpreter Development)

find_package(pybind11 REQUIRED)

pybind11_add_module(testing testing.cpp)
---------------------CMakeLists.txt-----------------------------------------------------------------------

I also use VS Code for building with CMake.
the CMake .txt file is also at C: .../Codeprojects/C++_gcc/test. It builds without problem, generating a folder called build with the file testing.cp312-win_amd64.pyd within this folder. So this .pyd file is located at C: .../Codeprojects/C++_gcc/test/build

My test.py is located at C: .../Codeprojects/Python, it is as follows
---------------------------------test.py--------------------------------------------------------------
import sys

sys.path.append("C: .../Codeprojects/C++_gcc/test/build")
import testing
----------------------------------test.py-------------------------------------------------------------

I have always the same problem: Pylance warns Import "testing" could not be resolved . The execution fails with ImportError: DLL load failed while importing testing: The specified module could not be found. I don't think this is dependency problem since I'm not using anything beyond core C++. Could it be conflicting Python versions (pybind11 is expecting other version)? Maybe something in the CMake file (I'm also new to CMake). I appreciate all help.

[doghelWang]

have the same problem! I appreciate all help!

[AlanTeixeiraNM]

Hi. I was able to build a working .py module when I used the "Visual Studio 17 2022" generator option when building the CMake project (see more about generators options on CMake documentation). This is because I use Windows and, as explained here [wiki.python.org/moin/WindowsCompilers](url), that is the compiler that have to be use. So, if you use Wndows, have correctly configured your CMakeLists.txt e use that Generator option your module should work correctly.