Passing a Python list to C function using the Python/C API

Question

I\'ve recently started using the Python/C API to build modules for Python using C code. I\'ve been trying to pass a Python list of numbers to a C function without success:

Answer 1

Would this do to properly free memory?

PyObject *res;
res = Py_BuildValue("i", _asdf(pr, pr_length));
free(pr);
return res;