Calling open cv python code for image display from C visual studio

I am trying to call image display code of python from C using cython.

I had followed the procedure for creating .c and .h from .pyx and adding these into the C code in visual studio.

I had checked the python version on command prompt and it is Python 3.6.3 |Anaconda custom (64-bit). I am able to import cv2 there on command prompt.

But when I call this .c and .h file into C code I am getting error

NameError: name 'cv2' is not defined
Exception ignored in: 'read.readImage'
NameError: name 'cv2' is not defined

I had checked for python path is set in the environment. Still I am getting the error.

The code for read.pyx is

import numpy as np
import cv2

cdef public void readImage():
    img = cv2.imread('dog.jpeg')
    print('reading')
    cv2.imshow('image',img)
    cv2.waitKey(0)
    cv2.destroyAllWindows()

The code for souce.cpp in visual studio is

#include "Python.h" 
# include "read.h"

using namespace cv;
int main(void) {
    Py_Initialize();  
    PyInit_read();
    readImage();
    Py_Finalize();   
    return 0;
}