Embedded Python in C++

[Xeno]

try to make a callback to the c++ from python code

added this c++ function

extern "C" {
	PyObject* CPython::spam_system(PyObject* self, PyObject* args)
	{
		const char* command;
		int sts;

		if (!PyArg_ParseTuple(args, "s", &command))
			return NULL;
		sts = system(command);
		return PyLong_FromLong(sts);
	}
}

trying to call back to c++ using ctypes, but not sure how to setup the args and returns when defining the c++ function in python

import ctypes

class TestClass:
    def __init__(self, count):
        self.count = count
        self.lib = ctypes.CDLL(
            r'C:\Users\WINSIM\PycharmProjects\testProject\cpp\cppTester\x64\Release\cppPythonWrapper.dll')
        # c++ function
        self.spam_system = getattr(self.lib, "?spam_system@CPython@@QEAAPEAU_object@@PEAU2@0@Z")
        # how to setup the c++ function callback?
        self.spam_system.argtypes = [c_string]
        self.spam_system.restype = c_long

    # the callback function
    def print_cb(self):
        self.spam_system("ls -s")

    def print_hi(self, name):
        if __name__ == '__main__':
            print(f'PYTHON: function is being run directly {name} {self.count}')
            self.print_cb()
            return "Completed"
        else:
            print(f'PYTHON: function is being imported {name} {self.count}')
            return "Skipped"