Qt调用python有参函数,并取函数返回值,并多次调用python模型

根据之前博客的配置已经将python环境以及qt成功调用python模块,此处需要调用模块内部的函数并取得函数返回值:

首先,新建python文件:

 首先看一下函数接口以及调用方式,可以看到参数全部都为string类型:

print(soh_estimation('C:/Users/lzg/Desktop/model/charge_device/file/data/Table_DataSOC50-90.csv','LLL',train_feature_path,processed_data_dir,feature_dir,'3420','3465'))

 根据参数类型构建调用方式:

    //设置主目录,就是python的主目录
    Py_SetPythonHome(L"D:\\conda\\envs\\model");

    //初始化python模块
    Py_Initialize();
    if(!Py_IsInitialized())
    {
        return -1;
    }

    PyRun_SimpleString("import numpy as np");                               //加载相关模块
    PyRun_SimpleString("import pandas as pd");
    PyRun_SimpleString("import os");
    PyRun_SimpleString("from scipy import interpolate");
    PyRun_SimpleString("from datetime import datetime, time");
    PyRun_SimpleString("import torch");
    PyRun_SimpleString("import gpytorch");

    PyObject* pModule = PyImport_ImportModule("charge");                    //加载自定义模块
    PyObject* pFun= PyObject_GetAttrString(pModule,"soh_estimation");       //加载方法,也就是函数
    PyObject*  args = PyTuple_New(7);                                       //构建元组,存放函数参数

    PyObject*  arg1 = PyUnicode_FromString("C:/Users/lzg/Desktop/qt_python/python_test/charge_device/file/data/Table_DataSOC50-90.csv");
    PyObject*  arg2 = PyUnicode_FromString("LLL");
    PyObject*  arg3 = PyUnicode_FromString("C:/Users/lzg/Desktop/qt_python/python_test/charge_device/file/tmp/HIs.csv");
    PyObject*  arg4 = PyUnicode_FromString("C:/Users/lzg/Desktop/qt_python/python_test/charge_device/file/tmp/processed_data/");
    PyObject*  arg5 = PyUnicode_FromString("C:/Users/lzg/Desktop/qt_python/python_test/charge_device/file/tmp/feature/");
    PyObject*  arg6 = PyUnicode_FromString("3420");
    PyObject*  arg7 = PyUnicode_FromString("3465");

    PyTuple_SetItem(args, 0, arg1);                                             //将参数都放到元组中
    PyTuple_SetItem(args, 1, arg2);
    PyTuple_SetItem(args, 2, arg3);
    PyTuple_SetItem(args, 3, arg4);
    PyTuple_SetItem(args, 4, arg5);
    PyTuple_SetItem(args, 5, arg6);
    PyTuple_SetItem(args, 6, arg7);

    PyObject* fshowc = PyObject_CallObject(pFun, args);                         //调用函数
    if(fshowc) {
        //将返回值转化为string类型
        PyObject* repr = PyObject_Repr(fshowc);
        PyObject* str = PyUnicode_AsEncodedString(repr, "utf-8", "strict");
        char* result = PyBytes_AsString(str);
        qDebug() << "result:" << result;
    }

    Py_Finalize();

 成功运行:

以上程序还存在bug,那就是无法多次调用,多次调用内存会急剧上升直至崩溃,因此还需要在后面增加垃圾回收函数:

PyGC_Collect();

只有这样,在多次调用python模型的同时程序占用内存也不会增加。

posted @ 2022-10-26 11:32  一颗蘋果  阅读(396)  评论(0编辑  收藏  举报