mingw(Qt) 利用pybind11生成python库

1.anaconda 安装创建环境

conda create --name test_pybind
conda activate test_pybind11
conda install pybind11

2.Qt CMake工程

CMakeLists.txt

cmake_minimum_required(VERSION 3.5)

project(testpybind11 LANGUAGES CXX)

set(CMAKE_INCLUDE_CURRENT_DIR ON)

set(CMAKE_AUTOUIC ON)
set(CMAKE_AUTOMOC ON)
set(CMAKE_AUTORCC ON)

set(CMAKE_CXX_STANDARD 11)
set(CMAKE_CXX_STANDARD_REQUIRED ON)
set(PYTHON_EXECUTABLE "C:/Users/93551/.conda/envs/test_pybind11/python.exe")
set(PYTHON_INCLUDE_DIR "C:/Users/93551/.conda/envs/test_pybind11/include")
set(PYTHON_LIBRARY "C:/Users/93551/.conda/envs/test_pybind11/libs")

set(pybind11_DIR "C:/Users/93551/.conda/envs/test_pybind11/Lib/site-packages/pybind11/share/cmake/pybind11")

include_directories(${PYTHON_INCLUDE_DIR})
link_directories(${PYTHON_LIBRARY})


find_package(Python REQUIRED)
find_package(pybind11 REQUIRED)
add_library(testpybind11 SHARED Myclass.cpp)
target_link_libraries(testpybind11  python3.lib python312.lib)

# 后缀名改成pyd能够被python引用
set_target_properties(testpybind11 PROPERTIES SUFFIX ".pyd")

MyClass.h

#ifndef MYCLASS_H
#define MYCLASS_H


class MyClass {
public:
    MyClass() : value(0) {}
    void setValue(int val) { value = val; }
    int getValue() { return value; }
    int value;
};


#endif // MYCLASS_H

MyClass.cpp

#include "MyClass.h"
#include "Python.h"

#include 
#include 
#include 
namespace py = pybind11;
using namespace py;

PYBIND11_MODULE(testpybind11, m) {
    py::class_<MyClass>(m, "MyClass")
        .def(py::init<>())
        .def("setValue", &MyClass::setValue)
        .def("getValue", &MyClass::getValue);
}

3.将生成的libtestpybind11.pyd为testpybind11.pyd

这一步非常重要，否则报错

ImportError: dynamic module does not define module export function

4.python调用

import testpybind11
 my_obj = testpybind11.MyClass()
my_obj.setValue(10)
print(my_obj.getValue())