功能：用qtcreator调用python文件。
1.环境：win10 64 位
python3.8 64位
mingw 64位 位数一定要匹配，如果是64位，全部为64位。包括环境变量中的设定值。2.pro 配置 路径选择 自己盘上的安装路径
win32:CONFIG(release, debug|release): LIBS += -L$$PWD/../../ProgramData/Python/Python38/libs/ -lpython38
else:win32:CONFIG(debug, debug|release): LIBS += -L$$PWD/../../ProgramData/Python/Python38/libs/ -lpython38_d
INCLUDEPATH += $$PWD/../../ProgramData/Python/Python38/libs
DEPENDPATH += $$PWD/../../ProgramData/Python/Python38/libs
INCLUDEPATH += $$PWD/../../ProgramData/Python/Python38/include
DEPENDPATH += $$PWD/../../ProgramData/Python/Python38/include
#win32-g++:CONFIG(release, debug|release): PRE_TARGETDEPS += $$PWD/../../ProgramData/Python/Python38/libs/libpython38.a
#else:win32-g++:CONFIG(debug, debug|release): PRE_TARGETDEPS += $$PWD/../../ProgramData/Python/Python38/libs/libpython38d.a
win32:!win32-g++:CONFIG(release, debug|release): PRE_TARGETDEPS += $$PWD/../../ProgramData/Python/Python38/libs/python38.lib
else:win32:!win32-g++:CONFIG(debug, debug|release): PRE_TARGETDEPS += $$PWD/../../ProgramData/Python/Python38/libs/python38_d.lib
3.main.cpp
1 #include "qtpyprj.h"
2
3 #include
4 #include
5 #include
6 #include
7
8 int main(int argc, char *argv[])
9 {
10 QApplication a(argc, argv);
11 qDebug()<<"run";
12 //设置了环境变量
13 Py_SetPythonHome((const wchar_t *)(L"D:/ProgramData/Python/Python38"));
14 //1.初始化Python解释器
15 Py_Initialize();
16 if(!Py_IsInitialized())
17 {
18 qDebug()<<"无法初始化Python解释器";
19 return -1;
20 }
21 //2.导入文件模块 py文件路径的问题
22 PyObject * pModule = PyImport_ImportModule("qtpyprj"); //pModule 调用的文件名,没有后缀
23 if (!pModule)
24 {
25 qDebug()<<"无法导入qtpyprj模块";
26 return -1;
27 }
28
29 //3.调用函数无参的
30 PyObject * pFunc_run = PyObject_GetAttrString(pModule, "run"); //pFunc 调用的函数名
31 if (!pFunc_run || !PyCallable_Check(pFunc_run))
32 {
33 qDebug()<<"无法从qtpyprj模块中加载run函数";
34 return -1;
35 }
36 PyEval_CallObject(pFunc_run, NULL);
37
38 /*qDebug()<<"开始调用add ";
39 PyObject * pFunc_add = PyObject_GetAttrString(pModule, "add"); //pFunc 调用的函数名
40 if (!pFunc_add || !PyCallable_Check(pFunc_add))
41 {
42 qDebug()<<"无法从qtpyprj模块中加载add函数";
43 return -1;
44 }
45
46 //4. 函数调用是有两种，一种传参数的，一种不传参数的。
47 //传参数有两种方法:
48 //4.1.1创建方法1
49 PyObject *arg3 =PyTuple_New(2);
50 PyObject *arg1 = PyLong_FromLong(1050);
51 PyObject *arg2 = PyLong_FromLong(520);
52
53 PyTuple_SetItem(arg3,0,arg1);
54 PyTuple_SetItem(arg3,1,arg2);
55
56 //4.1.2创建方法2
57 // PyObject *args3 =Py_BuildValue("",8.5,103.2);
58 //4.2 调用python 的add函数
59 PyObject *fe=PyEval_CallObject(pFunc_add, arg3); //pFunc 调用函数
60 //4.3返回值处理
61 float res2=0;
62 PyArg_Parse(fe,"f",&res2);//是浮点数
63
64 //4.4 输出结果
65 qDebug()<<"add(f):"<
4.python 文件存放目录 .py,.pyc与.exe3个文件同文件夹。
5.python文件
def run():
print("hello qt")
def add(a,b):
return a+b