Creating Python callbacks in Custom OPs

Wishlist and RFEs
2

Major upvote to this! I’m looking for both 1 and 2. I’ve used boost python and pybind11 moderately recently and pybind11 is waaaay better.

// inside CPlusPlusExample::execute(…) {

PyObject *p = something;
p = py::make_tuple("collisionStart", 42.);
// if a certain condition is met then
plugin_callback(p); // all custom plugins would have plugin_callback, which can't be modified

Inside a ParExecuteDAT or something new maybe

# this becomes a default function that the user can customize
# a lot like def onPulse(par):
def plugin_callback(obj):
    # do something with obj.
    # obj could be whatever the user determines via c++.
    # A good choice might be a tuple where the first item is a str identifying a broadcast event
    # and the second item is some value: ("collisionStart", 42.)
    pass

In c++ implement as many functions as we want that we would expose with bindings

void CPlusPlusExample::doCustomThing(std::string s) {
    // do something
}

PyObject* CPlusPlusExample::doCustomGet(std::string s, bool otherArgsArePossible) {
    PyObject *p = something;
    return p;
}

In c++ create pybind11 binding somehow

PYBIND11_MODULE(my_module, m)
{
    py::class_<CPlusPlusExample>(m, "CPlusPlusExample")
   .def("DoCustomThing", &CPlusPlusExample::doCustomThing)
   .def("DoCustomGet", &CPlusPlusExample::doCustomGet)
}

In python:

op('my_plugin').DoCustomThing("hello")
result = op('my_plugin').DoCustomGet("bark", True)
op('my_plugin').DoNotImplementedThing("fail") # throws error
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