python 如何调用cpp

#include "/home/oujie/anaconda3/envs/pytorch-master/include/python3.7m/Python.h"

#功能实现在这个函数中

extern "C"

int add_func(int a,int b)

{

    return a+b;

}

#下面的这些是调用相关的API把数据格式进行转换，让python可以调用，这也是python的头文件里面的定义好的

extern "C"

static PyObject *_add_func(PyObject *self, PyObject *args)

{

    int _a,_b;

    int res;

    if (!PyArg_ParseTuple(args, "ii", &_a, &_b))

        return NULL;

    res = add_func(_a, _b);

    return PyLong_FromLong(res);

}

extern "C"

static PyMethodDef CppModuleMethods[] =

{

    {

        "add_func",

        _add_func,

        METH_VARARGS,

        ""

    },

    {NULL, NULL, 0, NULL}

};

extern "C"

PyMODINIT_FUNC initcpp_module(void)

{

    (void) Py_InitModule("cpp_module", CppModuleMethods);

}

#linux下面编译成so

gcc -o add_demo.so -shared -fPIC add_demo.c

#windows下编译成dll

import ctypes

dll=ctypes.cdll.LoadLibrary

lib=dll("./add_demo.so")

print("python call cpp so:")

p=lib.add_func(2,3)

print(p)