python高阶教程-调用win c/c++ dll文件

ValueError: Procedure called with not enough arguments (8 bytes missing) or wrong calling convention

#ifdef __cplusplus
extern "C"{
#endif
int __stdcall __declspec(dllexport) MyAdd(int nA, int nB);
 
#ifdef __cplusplus
}
#endif

#include "TestDll.h"
 
#ifdef __cplusplus
extern "C"{
#endif
int __stdcall __declspec(dllexport) MyAdd(int nA, int nB)
{
    return nA + nB;
}
#ifdef __cplusplus
}
#endif

gcc TestDll.cpp -shared -o TestDll.dll

import ctypes
 
# 导出函数是__stdcall声明的使用
dll = ctypes.WinDLL("TestDll.dll")
# 导出函数是__cdecl声明的使用
#dll = ctypes.cdll.LoadLibrary("TestDll.dll")

summmm = getattr(dll, 'MyAdd@8')
ret = summmm(2, 4)
print(ret)