我试图导入一个python模块并在C++中执行一个函数。我有以下代码片段：

int python_exec(const fs::path& module_path, std::string_view function) {
    const auto tmp = module_path.string();

    PyObject* module = PyImport_ImportModule(tmp.data());

    if (!module) {
        return -1;
    }

    PyObject* symbol = PyObject_GetAttrString(module, function.data());

    if (!symbol) {
        return - 1;
    }

    if (PyCallable_Check(symbol)) {
        PyObject* value = PyObject_CallObject(symbol, nullptr);
        return PyLong_AsLong(value);
    }

    return -1;
}

int main(int argc, char** argv)
{
    const auto current = fs::current_path();
    const auto module  = argv[1];

    std::cout << current << '\n';        // "C:\\full\\path\\to\\project\\cmake-build-debug"
    std::cout << module  << '\n';        // "../test/test.py"

    Py_Initialize();
    Py_SetPath(current.c_str());

    std::cout << python_exec(module, "my_func") << '\n';

    Py_Finalize();

    return 0;
}

以及以下项目结构：

project
|_cmake-build-debug
|    |_app.exe
|_test
     |_test.py

我的可执行文件在build目录中运行，我将"../test/test.py"作为程序参数传递
Python抛出ModuleNotFoundError: No module named '.'错误。
我还尝试在Py_Initialize之前调用Py_SetPath，如这里所建议的https://stackoverflow.com/a/63452021/22124714，但这导致了其他错误，我无法完全解释：

Python path configuration:
  PYTHONHOME = (not set)
  PYTHONPATH = (not set)
  program name = 'python'
  isolated = 0
  environment = 1
  user site = 1
  import site = 1
  sys._base_executable = 'C:\\full\\path\\to\\project\\cmake-build-debug\\pytest.exe'
  sys.base_prefix = ''
  sys.base_exec_prefix = ''
  sys.platlibdir = 'lib'
  sys.executable = 'C:\\full\\path\\to\\project\\cmake-build-debug\\pytest.exe'
  sys.prefix = ''
  sys.exec_prefix = ''
  sys.path = [
    'C:\\full\\path\\to\\project\\cmake-build-debug',
  ]
Fatal Python error: init_fs_encoding: failed to get the Python codec of the filesystem encoding
Python runtime state: core initialized
ModuleNotFoundError: No module named 'encodings'

这两条线看起来很可疑。

PYTHONHOME = (not set)
PYTHONPATH = (not set)

我想我没有正确理解Py_SetPath函数，如何解决这个问题？