C++端调用python脚本的方法

发布于:2025-07-27 ⋅ 阅读:(13) ⋅ 点赞:(0)

1、C++端调python代码的方法

main.cpp如下:

#include <Python.h>
#include <iostream>

int main() {
    Py_Initialize(); // 初始化Python解释器

    // 运行一个简单的Python语句
    PyRun_SimpleString("print('Hello from Python!')");

    // 调用自定义Python脚本
    PyObject* pName = PyUnicode_DecodeFSDefault("test_script");
    PyObject* pModule = PyImport_Import(pName);
    Py_DECREF(pName);

    if (pModule != nullptr) {
        PyObject* pFunc = PyObject_GetAttrString(pModule, "add");
        if (pFunc && PyCallable_Check(pFunc)) {
            PyObject* pArgs = PyTuple_Pack(2, PyLong_FromLong(3), PyLong_FromLong(5));
            PyObject* pValue = PyObject_CallObject(pFunc, pArgs);
            Py_DECREF(pArgs);
            if (pValue != nullptr) {
                std::cout << "Result of add: " << PyLong_AsLong(pValue) << std::endl;
                Py_DECREF(pValue);
            }
        }
        Py_XDECREF(pFunc);
        Py_DECREF(pModule);
    } else {
        PyErr_Print();
    }

    Py_Finalize(); // 关闭Python解释器
    getchar();
    return 0;
}

test_script.py代码如下:

def add(a, b):
    return a + b

CMakeList.txt如下:

project(demo_cpp_call_python)

set(Python3_ROOT_DIR "C:/Users/AppData/Local/Programs/Python/")  # 这里填你的Python安装目录
set(Python3_INCLUDE_DIR "C:/Users/AppData/Local/Programs/Python/Python39/include")
set(Python3_LIBRARY "C:/Users/AppData/Local/Programs/Python/Python39/libs/python39.lib")
find_package(Python3 COMPONENTS Interpreter Development REQUIRED)

add_executable(demo_cpp_call_python main.cpp)
target_include_directories(demo_cpp_call_python PRIVATE ${Python3_INCLUDE_DIRS})
target_link_libraries(demo_cpp_call_python PRIVATE ${Python3_LIBRARIES})

执行结果如下:
在这里插入图片描述


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