如何在pybind11中将python函数强制转换为std::function<double(double*)>？

#include <pybind11/pybind11.h>
#include <pybind11/functional.h>

namespace py = pybind11;

double call_python_function(std::function<double(double*)> func, double* arg) {
    return func(arg);
}

PYBIND11_MODULE(example, m) {
    m.def("call_python_function", [](py::function func, py::array_t<double> arg) {
        py::buffer_info info = arg.request();
        double* ptr = static_cast<double*>(info.ptr);
        std::function<double(double*)> cpp_func = [func](double* arg) {
            py::gil_scoped_acquire acquire;
            py::array_t<double> py_arg(info.size);
            std::memcpy(py_arg.mutable_data(), arg, info.size * sizeof(double));
            py::object result = func(py_arg);
            return result.cast<double>();
        };
        return call_python_function(cpp_func, ptr);
    });
}