Failed to execute Cython wrapped Python code

Question

I am exporting a C ++ API for python code using Cython. The application will run on Ubuntu. Project files are here

The function that I am wrapping reads the image file name and displays the image. The file is Show_Img.pyxas follows

import cv2

cdef public void Print_image(char* name):
  img = cv2.imread(name)
  cv2.imshow("Image", img)
  while(True):
    if cv2.waitKey(1) & 0xFF == ord('q'):
      break

The C ++ interface created from Cython is as follows

__PYX_EXTERN_C DL_IMPORT(void) Print_image(char *);

The header file is included in mine algo.cpp, which calls the function as shown below

#include<iostream>
#include<Python.h>
#include"Show_Img.h"
using namespace std;

int main(){
  char *name = "face.jpg"; 
  Py_Initialize();
  Print_image(name);
  Py_Finalize();
  return 0;
}

Using the command below, I can also compile the above code as well as generate the application

g++ algo.cpp `pkg-config --libs --cflags python-2.7` `pkg-config --libs --cflags opencv` -L. -lShow_Img -o algo

library path is also set correctly LD_LIBRARY_PATH

An error occurs after running the application Segmentation fault (core dumped)

Why can't I run the application, is there an error in the generation process? or library linking?

Answer 1

, init :

// ...
Py_Initialize();
initShow_Img(); // for Python3 use PyInit_Show_Img instead
Print_image(name);
Py_Finalize();
// ...

, , import cv2. , ( cv2). .

.