On 2021-07-23 09:20, Bartosz Golaszewski wrote:
Hi!
I'm working on a Python C extension and I would like to expose a
custom enum (as in: a class inheriting from enum.Enum) that would be
entirely defined in C.
It turned out to not be a trivial task and the regular mechanism for
inheritance using .tp_base doesn't work - most likely due to the
Enum's meta class not being pulled in.
Basically I'm trying to do this:
[snip]
static PyObject *make_bases(PyObject *enum_mod)
{
PyObject *enum_type, *bases;
enum_type = PyObject_GetAttrString(enum_mod, "Enum");
if (!enum_type)
return NULL;
bases = PyTuple_Pack(1, enum_type); /* Steals reference. */
PyTuple_Pack doesn't steal references, as far as I can tell.
if (!bases)
Py_DECREF(enum_type);
return bases;
}
[snip]
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