Embedded Python in C++

[Xeno]

I was using the sample code as base and trying to return a string from the func.

mainly it seem to fail on:
str = PyUnicode_AsEncodedString(result, "utf-8", "~I~");
the returned str object is NULL

int main() {
        const char* spamclass = R""""(
class Spam:
    def func(self):
        if __name__ == '__main__':
            print('called in __main__')
            return "Completed"
        else:
            print('called out of __main__')
            return "Skipped"
    )"""";
        PyObject* mainmod, * Spam, * spam, * meth, * result, * repr, *str;
        const char* s;
        Py_Initialize();
        PyRun_SimpleString("from time import time,ctime\n"
            "print('Today is', ctime(time()))\n");
        PyRun_SimpleString(
            spamclass
        );
        mainmod = PyImport_ImportModule("__main__");
        Spam = PyObject_GetAttrString(mainmod, "Spam");
        spam = PyObject_CallObject(Spam, NULL);
        meth = PyObject_GetAttrString(spam, "func");
        result = PyObject_CallObject(meth, NULL);
        if (!PyUnicode_CheckExact(result)) {
            repr = PyObject_Repr(result);
            str = PyUnicode_AsEncodedString(repr, "utf-8", "~I~");
            s = PyBytes_AS_STRING(str);
            cout << "response from python: " << s << endl;
        }
        else {
            str = PyUnicode_AsEncodedString(result, "utf-8", "~I~");
            s = PyBytes_AS_STRING(str);
            cout << "response from python: " << s << endl;
        }
        if (Py_FinalizeEx() < 0) {
            exit(120);
        }
        return 0;
}