无法从linux，c++执行"my_script“python脚本的"main(filename)”函数；pModule = PyImport_Import(pName)；返回null

Question

尝试从Linux的main()，c++调用my_script.py的main(filename)函数。

For call pName不为NULL，但next pName = PyUnicode_DecodeFSDefault(argv[1]); pModule = PyImport_Import(pName); pModule为NULL。

my_script的主函数将把图片的文件名作为参数，返回一个包含蔬菜名称的字符串。这里，pModule = PyImport_Import(pName);pModule返回null。

我试过pwd得到了/home/sandeep/Downloads/VegeTable-master/VegeTable/image_recognition

export PYTHONPATH=/home/sandeep/Downloads/VegeTable-master/VegeTable/image_recognition，但pModule仍为空

int main(int argc, char* argv[])
{

    PyObject *pName, *pModule, *pFunc;
    PyObject *pArgs, *pValue, *syspath;
    int i;
    char * str = get_current_dir_name();
    char* path, *eximpath = "/etc/exim";
    cout<<"str="<<str<<endl;
    if (argc < 3) {
        fprintf(stderr,"Usage: call pythonfile funcname [args]\n");
        return 1;
    }
    wchar_t *program = Py_DecodeLocale(argv[0], NULL);
    if (program == NULL) {
        fprintf(stderr, "Fatal error: cannot decode argv[0]\n");
        exit(1);
    }

    Py_SetProgramName(program);
    Py_Initialize();


    system("echo $PYTHONPATH");
    pName = PyUnicode_DecodeFSDefault(argv[1]);
    /* Error checking of pName left out */

    if(pName)
       cout<<"OK:"<<endl;

    pModule = PyImport_Import(pName);
    Py_DECREF(pName);

    if(pModule) cout<<"success"<<endl;

     if (pModule != NULL)
  {
             cout<<"success"<<endl;
         pFunc = PyObject_GetAttrString(pModule, argv[2]);
         /* pFunc is a new reference */

         if (pFunc && PyCallable_Check(pFunc))
         {
             pArgs = PyTuple_New(argc - 3);
             for (i = 0; i < argc - 3; ++i)
             {
                 pValue = PyLong_FromLong(atoi(argv[i + 3]));
                 if (!pValue)
                 {
                    Py_DECREF(pArgs);
                    Py_DECREF(pModule);
                    fprintf(stderr, "Cannot convert argument\n");
                    return 1;
                 }
                 /* pValue reference stolen here: */
                 PyTuple_SetItem(pArgs, i, pValue);
             }
             pValue = PyObject_CallObject(pFunc, pArgs);
             cout<<"success"<<endl;
             Py_DECREF(pArgs);
             if (pValue != NULL)
             {
                 printf("Result of call: %ld\n", PyLong_AsLong(pValue));
                 Py_DECREF(pValue);
             }
             else
             {
                Py_DECREF(pFunc);
                Py_DECREF(pModule);
                PyErr_Print();
                fprintf(stderr,"Call failed\n");
return 1;
             }

         }
         else
         {
            if (PyErr_Occurred())
                PyErr_Print();
            fprintf(stderr, "Cannot find function \"%s\"\n", argv[2]);
         }
         Py_XDECREF(pFunc);
         Py_DECREF(pModule);

     }
     else
     {
        PyErr_Print();
        fprintf(stderr, "Failed to load \"%s\"\n", argv[1]);
        return 1;
    }
    if (Py_FinalizeEx() < 0)
    {
        return 120;
    }
}

output-
str=/home/sandeep/Downloads/VegeTable-master/VegeTable/image_recognition
/home/sandeep/Downloads/VegeTable-master/VegeTable/image_recognition
OK:
  File "/home/sandeep/Downloads/VegeTable-master/VegeTable/image_recognition/my_script.py", line 135
    return ('unknown')
                     ^
TabError: inconsistent use of tabs and spaces in indentation
Failed to load "my_script"

用于运行我使用的代码./pyembed my_script main download.jpeg

我从头开始写了一个新函数和两个脚本文件。两个脚本文件的内容相同。但它在1中运行，并在其他中给出错误。an.py->

#!/usr/bin/python

def fun(name):
    return 4

myscript.py->

#!/usr/bin/python

#import cv2
#import numpy as np

def fun(name):
   return 4

embedpy.c的内容

int main(int argc, char* argv[])
{

    wchar_t* program;
    PyObject *pName, *pModule, *pFunc;
    PyObject *pArgs, *pValue, *syspath;
    int i;

    if(argc<3)
    {
        cerr<<"Usage: call pythonfile funcname [args]\n"<<endl;
        return 1;
    }

    program = Py_DecodeLocale(argv[0],NULL);

    Py_SetProgramName(program);
    Py_Initialize();


    pName = PyUnicode_DecodeFSDefault(argv[1]);

    if(!pName)
    {
        cerr<<"error in pName"<<endl;

        return 1;
    }


    pModule = PyImport_Import(pName);
    Py_DECREF(pName);

    if(!pModule)
    {
        PyErr_Print();
        cerr<<"error in pModule"<<endl;

        return 1;
    }

    pFunc = PyObject_GetAttrString(pModule, argv[2]);

    if(!pFunc || !PyCallable_Check(pFunc))
    {
        if (PyErr_Occurred())
                PyErr_Print();
        cerr<<"can not find function"<<argv[2]<<endl;

        return 1;
    }

    pArgs = PyTuple_New(argc - 3);
    for(int i = 0; i < argc-3; i++)
    {
        pValue = PyLong_FromLong(atoi(argv[i + 3]));

        if(!pValue)
        {
            Py_DECREF(pArgs);
            Py_DECREF(pModule);

            cerr<<"can not convert argument"<<endl;

            return 1;
        }

        PyTuple_SetItem(pArgs, i, pValue);
    }


    }

    pValue = PyObject_CallObject(pFunc, pArgs);
    Py_DECREF(pArgs);

    if(!pValue)
    {
        Py_DECREF(pFunc);
        Py_DECREF(pModule);

        PyErr_Print();
        cerr<<"function call failed"<<endl;

        return 1;
    }

    cout<<"Result of Call = "<<PyLong_AsLong(pValue)<<endl;
    Py_DECREF(pValue);


    if (Py_FinalizeEx() < 0)
    {
        return 120;
    }

}

我和我一起跑步

./embedpy an fun download.jpeg

和

./embedpy myscript fun download.jpeg

在第一种情况下错误- ModuleNotFoundError: pModule中没有名为'an‘的模块错误

在第二种情况下，调用没有错误结果=4

我真正的问题(实际)是我不能跑步

./embedpy my_script main download.jpeg

error- ModuleNotFoundError: pModule中没有名为'my_script‘的模块错误

ls -l gives
-rw-r--r-- 1 sandeep sandeep       47 Jul 19 14:31 an.py
-rwxrwxrwx 1 sandeep sandeep     3947 Jul 19 13:50 my_script.py
-rw-r--r-- 1 sandeep sandeep       79 Jul 19 14:31 myscript.py
-rwxr-xr-x 1 sandeep sandeep    13816 Jul 19 13:59 embedpy
-rw-r--r-- 1 sandeep sandeep     1804 Jul 19 13:54 embedpy.cpp
-rw-r--r-- 1 sandeep sandeep       79 Jul 19 14:53 script2.py

我复制时使用

cp myscript.py script2.py

但

./embedpy script2 fun download.jpeg 

ModuleNotFoundError: pModule中没有名为“script2”的模块错误

和

./embedpy myscript fun download.jpeg

调用结果=4

奇怪->我做到了

export PYTHONPATH=/home/sandeep/Downloads/VegeTable-master/VegeTable/image_recognition

和

./embedpy an fun download.jpeg
./embedpy myscript fun download.jpeg
./embedpy script2 fun download.jpeg

给

调用结果=4

./embedpy my_script main download.jpeg

返回文件"/home/sandeep/Downloads/VegeTable-master/VegeTable/image_recognition/my_script.py"，第136行('unknown') ^ TabError:缩进中的制表符和空格使用不一致

pModule中的错误

我尝试从"my_script.py“到"an.py”中包含元素1到1。我包含了2个导入，但出现错误

an.py->

!/usr/bin/python

import cv2
import numpy as np

def fun(name):
    return 4

./embedpy an fun download.jpeg

提供回溯(最近一次调用)：文件"/home/sandeep/Downloads/VegeTable-master/VegeTable/image_recognition/an.py"，第3行，导入cv2 ModuleNotFoundError: pModule中没有名为'cv2‘的模块错误

我在控制台输入"conda update anaconda-navigator“conda: command not found

Answer 1

你写的程序是用C++编写的，如果你把文件扩展名添加为my_script.py，它将无法工作。尝试将文件扩展名更改为my_script.cpp。错误本身是关于缩进和使用制表符的，这在python中是必需的，而不是使用大括号。并将这些包作为标题包含在程序中，以便您使用这些包。