Creating Python Module from CPP implementation using pybind11

main.py

import p1
from p1 import Rlenv
a = 123
b = 234
print(a,b)
print("Adding ",a,b)
res = p1.add(a,b)
print("Result is",res)

class Home(Rlenv):
    pass

h = Home()
print(h.sub(4,3))

p1.cpp

#include<vector>
#include<iostream>
#include<pybind11/pybind11.h>
#include<pybind11/stl.h>

using namespace std;
namespace py = pybind11;

class Rlenv{
	public:
		Rlenv(){}
		int sub(int a, int b){
			return a-b;
		}
};

int add(int a, int b){
        return a+b;
}

PYBIND11_MODULE(p1, m){
	m.doc() = "Example pybind11 plugin";
	m.def("add",&add);
	py::class_<Rlenv>(m,"Rlenv")
		.def(py::init<>())
		.def("sub",&Rlenv::sub);
}