C++ python binding: failed to import cv2

Question

I m using Ubuntu 20.04, python 3.8 and developing a C++ project in Qt Creator. I m trying to call a python file from C++ code. I have created an environment in conda and calling the py file. There is segmentation fault occurring when I m attempting to import cv2 module. Other modules like sys, numpy can be imported. cv2 is installed in the environment and can be accessed when I run python from cmd prompt.

Also I tried to run the python commands directly in a C++ file, like:

PyRun_SimpleString("import cv2");

But this also sends segmentation fault. I tried giving path of the site-packages directory in CMakeLists.txt but it also resulted in same error.

mainwindow.cpp:

#include "mainwindow.h"
#include "./ui_mainwindow.h"
#include <stdio.h>
#include <pyhelper.hpp>
#include <string>
#include <iostream>

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
    , ui(new Ui::MainWindow)
{
    ui->setupUi(this);

    Py_InitializeEx(0);

    PyRun_SimpleString("import cv2");

}

MainWindow::~MainWindow()
{
    delete ui;
}

Qt Creator debugger stack trace is as below: