Calling a python function on a different thread

[spookybear0]

Right now I'm creating an interface to create "hooks" on an application from python (which is basically just calling a function from my program whenever the target function is run). I've successfully created the hook and I'm saving the passed callback python function in an std::map. I try to access the map from the hook (on another thread) after acquiring the GIL but when I call it, it raises py::error_already_set. When I go to the traceback it gives something similar to this:

Traceback (most recent call last):
  File "(filename)", line 7, in hook
    print("from func")
TypeError: 'NoneType' object is not callable

Here's how I'm calling it:

py::gil_scoped_acquire guard{};

hookmap[__FUNCTION__]();

The catch here is that it's always on the first line of the function that errors, even if I change it to something like import sys (which can't have this error. I'm sure it's something threading related. I've check that I have successfully acquired the GIL. I have also tested that doing a sample py::print(py::module_::import("math").attr("sqrt")(1024)); works, but I just can't call the function. Does anyone have any ideas?

[spookybear0]

It's fixed now, the problem was the the interpreter was being destroyed before I called the function.