C++调用Python-5：调用Python函数，传参数字+字符串

 

# mytest.py

def myjoin(a, b):
    print("num a + str b")
    return f"{a}=={b}"

 

#include "Python.h"
#include <iostream>
using namespace std;

int main(int argc, char* argv[])
{
    Py_Initialize();
    if (!Py_IsInitialized())
    {
        cout << "初始化失败" << endl;
    }
    
    PyRun_SimpleString("import sys");
    PyRun_SimpleString("sys.path.append('./')");

    PyObject* pModel = nullptr;
    pModel = PyImport_ImportModule("mytest");

    // add 函数
    PyObject* addFunc = PyObject_GetAttrString(pModel, "myjoin");
    PyObject* addArgs = Py_BuildValue("(is)", 12, "34");
    PyObject* addRes = PyObject_CallObject(addFunc, addArgs);
    char* s = nullptr;
    PyArg_Parse(addRes, "s", &s);
    cout << "返回值：" << s << endl;
    Py_DecRef(addRes);
    Py_DecRef(addArgs);
    Py_DecRef(addFunc);

    Py_Finalize();
    return 0;
}