问如何防止内存泄漏？

EN

void pythonTest(PyObject* inModule)
{
    // Section 1: Get the make function:
    PyObject* pMakeFunc = PyObject_GetAttrString(inModule, "make");

    PyObject* pMakeArgs = PyTuple_New(1);
    PyTuple_SetItem(pMakeArgs, 0, PyUnicode_FromString("LunarLanderContinuous-v2"));

    // Section 2: Get the environment and its functions:
    PyObject* pEnv = PyObject_CallObject(pMakeFunc, pMakeArgs);
    PyObject* pEnvReset = PyObject_GetAttrString(pEnv, "reset");
    PyObject* pEnvStep = PyObject_GetAttrString(pEnv, "step");
    PyObject* pEnvClose = PyObject_GetAttrString(pEnv, "close");
    PyObject* pEnvRender = PyObject_GetAttrString(pEnv, "render");

    // Section 3: Reset the environment to get the initial observation:
    PyObject* pInitialObsArray = PyObject_CallNoArgs(pEnvReset);
    PyObject* pInitialObsListFunc = PyObject_GetAttrString(pInitialObsArray, "tolist");
    PyObject* pInitialObsList = PyObject_CallNoArgs(pInitialObsListFunc);

    // Clear section 3:
    Py_CLEAR(pInitialObsList);
    Py_CLEAR(pInitialObsListFunc);
    Py_CLEAR(pInitialObsArray);

    // Clear section 2: Close the environment, first:
    PyObject_CallNoArgs(pEnvClose);
    Py_CLEAR(pEnvRender);
    Py_CLEAR(pEnvClose);
    Py_CLEAR(pEnvStep);
    Py_CLEAR(pEnvReset);

    Py_CLEAR(pEnv);

    // Clear section 1:
    Py_CLEAR(pMakeArgs);
    Py_CLEAR(pMakeFunc);
}

int main()
{
    Py_Initialize();

    // Get gym module:
    PyObject* pGymName = PyUnicode_FromString("gym");
    PyObject* pModule = PyImport_Import(pGymName);

    // Get garbage collection module and collect function:
    PyObject* pgcName = PyUnicode_FromString("gc");
    PyObject* pgcModule = PyImport_Import(pgcName);
    PyObject* pgcFunction = PyObject_GetAttrString(pgcModule, "collect");

    for (int k = 0; k < 1000000; ++k)
    {        
        pythonTest(pModule);
        
        // Manually invoke the garbage collection:
        PyObject* pGCReturn = PyObject_CallNoArgs(pgcFunction);
        auto objectsCollected = PyLong_AsLong(pGCReturn);
        std::cout << "Iteration " << k << " objects collected: " 
            << objectsCollected << std::endl;

        Py_CLEAR(pGCReturn);
    }

    Py_CLEAR(pgcFunction);
    Py_CLEAR(pgcModule);
    Py_CLEAR(pgcName);

    Py_CLEAR(pModule);
    Py_CLEAR(pGymName);

    Py_Finalize();

    return 0;
}