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GeezerVison is showing github.com — CppCallPython/EmbedPython/CallPython.cpp at master · UlovHer/CppCallPython

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// CallPython.cpp : Defines the entry point for the console application.
#include "stdafx.h"
#include "Python.h"
#include <iostream>
#include <string>
using namespace std;
int callPythonFunc(const char* scriptName, const char* funcName) {
Py_Initialize();
int callState = NULL;
if (Py_IsInitialized()) {
PyObject* pModule = NULL;
PyObject* PFunc = NULL;
PyRun_SimpleString("import sys");
PyRun_SimpleString("sys.path.append('../PyrthonScripts/')");
//初始化python系统文件路径，保证可以访问到 .py文件
pModule = PyImport_ImportModule(scriptName);
if (pModule) {
cout << "Import module " << scriptName << " success" << endl;
PFunc = PyObject_GetAttrString(pModule, funcName);
if (PFunc || PyCallable_Check(PFunc)) {
cout << "Import attribute " << funcName << " success" << endl;
//创建一个元组,包含1个元素
PyObject* pArgs = PyTuple_New(1);
//s表示创建string型变量,赋值给第0个参数
PyTuple_SetItem(pArgs, 0, Py_BuildValue("s", "cpp is calling python function!"));
PyObject* pReturn = PyEval_CallObject(PFunc, pArgs);
PyArg_Parse(pReturn, "i", &callState);
Py_DecRef(pArgs);
Py_DecRef(pReturn);
Py_DecRef(PFunc);
Py_DecRef(pModule);
//PyMem_Free(pArgs);
//销毁创建的PyObject对象引用
//当函数的返回值是New reference时，需要对PyObject* 变量使用Py_DECREF()
//返回值是 Borrowed reference时，无需使用Py_DECREF()
}
else {
callState = 0;
cout << "Import attribute " << funcName << " faile" << endl;
}
}
else
{
callState = -1;
cout << "Import module " << scriptName << " faile" << endl;
}
}
Py_Finalize();
return callState;
}
int callPythonAdd(const char* scriptName, const char* funcName)
{
Py_Initialize();
int callState = NULL;
if (Py_IsInitialized()) {
PyObject* pModule = NULL;
PyObject* PFunc = NULL;
PyRun_SimpleString("import sys");
PyRun_SimpleString("sys.path.append('../PyrthonScripts/')");
//初始化python系统文件路径，保证可以访问到 .py文件
pModule = PyImport_ImportModule(scriptName);
if (pModule) {
cout << "Import module " << scriptName << " success" << endl;
PFunc = PyObject_GetAttrString(pModule, funcName);
if (PFunc || PyCallable_Check(PFunc)) {
cout << "Import attribute " << funcName << " success" << endl;
PyObject* pArgs = PyTuple_New(2);
//i表示创建int型变量,赋值给第0个参数
PyTuple_SetItem(pArgs, 0, Py_BuildValue("i", 10));
PyTuple_SetItem(pArgs, 1, Py_BuildValue("i", 50));
PyObject* pReturn = PyEval_CallObject(PFunc, pArgs);
//解析返回参数
PyArg_Parse(pReturn, "i", &callState);
cout << "the result is " << callState << endl;
Py_DecRef(pArgs);
Py_DecRef(pReturn);
Py_DecRef(PFunc);
Py_DecRef(pModule);
//PyMem_Free(pArgs);会出现内存非法访问
//销毁创建的PyObject对象引用
//当函数的返回值是New reference时，需要对PyObject* 变量使用Py_DECREF()
//返回值是 Borrowed reference时，无需使用Py_DECREF()
}
else {
callState = 0;
cout << "Import attribute " << funcName << " faile" << endl;
}
}
else
{
callState = -1;
cout << "Import module " << scriptName << " faile" << endl;
}
}
Py_Finalize();
return callState;
}
int callPythonFile(const char* scriptName, const char* scriptPath, int argc, wchar_t** argv) {
Py_Initialize();
int callState = -1;
if (Py_IsInitialized())
{
cout << " python interpreter initialize success" << endl;
//Py_SetPath(scriptPath);
//设置默认的模块搜索路径
//切换路径函数 GetCurrentDirectory 和 SetCurrentDirectory
/*wprintf(L"%s\n", scriptPath);
wprintf(L"%s\n", argv[0]);
wprintf(L"%s\n", argv[1]);
*/
PySys_SetArgv(argc, argv);
//导入执行脚本时的命令行参数
FILE *fp;
//errno_t err = fopen_s(&fp, scriptFile, "r");
if (!(fopen_s(&fp, scriptPath, "r")))
{
//获取python文件句柄
cout << "open python script success" << endl;
if (!(PyRun_AnyFile(fp, scriptName)))
{
callState = 1;
cout << "call python script success" << endl;
}
//执行调用脚本文件命令, 注意文件的路径
}
else
{
callState = -2;
cout << "open python script fail" << endl;
}
fclose(fp);
}
Py_Finalize();
return callState;
}
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