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

using namespace std;

int main()
{
    Py_Initialize();
    if (!Py_IsInitialized())
    {
        printf("初始化失败！");
        return 0;
    }
    PyRun_SimpleString("import sys");
    PyRun_SimpleString("sys.path.append('./')");

    PyRun_SimpleString("import cv2");
    Py_Finalize();
}

opencv-python版本4.8.0.76

解决方法：

卸载opencv-contrib-python

pip uninstall opencv-contrib-python

补充解决方法：

运行时将python38.dll和python3.dll都复制到exe同目录或者工程目录，我的python版本是3.8.5