I am defining a pybind11 method that takes an object argument type (because it can take a variety of different argument types). I want to check if that object is an integer, and if so get that integer. How do I do this?
In other words, what is the pybind11 equivalent of this python code:
def method(obj):
if isinstance(obj, int):
value = int(obj)
...
else:
...
void method(const pybind11::object &obj) {
...
}
I've updated my answer based on this issue showing how to use templated functions.
You can use py::cast (see the doc) and use a try catch block to cast your py::object to int.
#include <iostream>
#include <pybind11/pybind11.h>
namespace py = pybind11;
template <typename T>
void convert(const py::object stuf){
try{
T a = stuf.cast<T>();
std::cout << a << std::endl;
}catch(py::cast_error){
std::cout << "Input object is not of known type\n";
}
}
/* Wrapping routines with PyBind */
PYBIND11_MODULE(wrapper, m) {
m.doc() = "";
m.def("convert", &convert<int>, "");
m.def("convert", &convert<float>, "");
m.def("convert", &convert<double>, "");
m.def("convert", &convert<bool>, "");
}