python调用C++代码例子

my_module.cpp

#define PY_SSIZE_T_CLEAN
#define BOOST_PYTHON_MODULE_NAME my_module
//#include <pybind11/pybind11.h>
#include <boost/python.hpp>

int add(int a, int b) {
    return a + b;
}

//PYBIND11_MODULE(libmy_module, m) {
//    m.def("add", &add, "Prints a greeting from C++");
//}

BOOST_PYTHON_MODULE(libmy_module) {
    using namespace boost::python;
    def("add", add);
}

CMakeLists.txt

cmake_minimum_required(VERSION 3.12)
project(kalibr-example)

# 查找 Boost.Python
find_package(Boost REQUIRED COMPONENTS python)
include_directories(${Boost_INCLUDE_DIRS})
link_directories(${Boost_LIBRARY_DIRS})

set(Python_ADDITIONAL_VERSIONS 3.11)  # 替换为您的 Python 版本
find_package(PythonLibs REQUIRED)
include_directories(${PYTHON_INCLUDE_DIRS})
#
#set(pybind11_DIR /home/local/.local/lib/python3.8/site-packages/pybind11/share/cmake/pybind11/)
#find_package(pybind11 REQUIRED)

add_library(my_module MODULE my_module.cpp)
#target_link_libraries(my_module PRIVATE pybind11::module)
target_link_libraries(my_module PRIVATE Boost::python)

python :main.py

import sys
import libmy_module
result = libmy_module.add(1, 2)
print ("result:{}".format(result))

出现的一个报错：

原因分析：

cmake生成的动态库名字为libmy_module.so

要和cpp代码中红框处的变量名保持一致才行