问当我尝试从c++调用python函数时，为什么会得到"no attirubute error“

EN

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

int
main(int argc, char *argv[])
{
    PyObject *pName, *pModule, *pFunc;
    PyObject *pArgs, *pValue;
    int i;

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

    Py_Initialize();
    pName = PyUnicode_DecodeFSDefault(argv[1]);
    /* Error checking of pName left out */
    std::cout << pName << std::endl;
    pModule = PyImport_Import(pName);
    Py_DECREF(pName);

    if (pModule != NULL) {
        pFunc = PyObject_GetAttrString(pModule, argv[2]);
        /* pFunc is a new reference */
        // didn't add the all code 
    }
    return 0;
}

def multiply(a,b):
    print("Will compute", a, "times", b)
    c = 0
    for i in range(0, a):
        c = c + b
    return c

cmake_minimum_required(VERSION 2.6)
project(demo)
find_package(PythonLibs REQUIRED)
include_directories(${PYTHON_INCLUDE_DIRS})
add_executable(demo embeddedPython.cpp)
target_link_libraries(demo ${PYTHON_LIBRARIES})

./demo test multiply 3 2

AttributeError: module 'test' has no attribute 'multiply'
Cannot find function "multiply"