how to send class pointer to python function?

Asked Sep 26 '19 at 06:30

Active Sep 26 '19 at 06:30

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i have a c++ class A , it will callback a python function foo(A) , and i want to send a A* pointer to this function , how can i do it ? my code is similar as follow :

PyObject* arg = (PyObject*)(pA);
PyTuple_SetItem(args, 0, arg);
PyObject* pRet = PyObject_CallObject(foo, args);

but it always crash , seems wrap arg from A* is not correct , can anybody help me ?

asked Sep 26 '19 at 06:30

xpadvent

You can’t just **pretend** your `A` object is a Python object! The cast should be a red flag. Moreover, what do you want the Python function to **do** with the pointer? – Davis Herring Sep 26 '19 at 12:54
function foo is a python function , i callback it from C++ , in foo , the pointer will call some member function , such as A::do_something() – xpadvent Sep 27 '19 at 02:58
how to wrap the pointer ? – xpadvent Sep 27 '19 at 02:59
Possible duplicate of [Passing a C pointer around with the Python/C API](https://stackoverflow.com/questions/8436578/passing-a-c-pointer-around-with-the-python-c-api) – Davis Herring Sep 27 '19 at 03:01
i already checked that question before , but it can't run correctly – xpadvent Sep 27 '19 at 03:07
Then it seems that you have a specific question in mind about it that you should ask. – Davis Herring Sep 27 '19 at 04:07

how to send class pointer to python function?

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