> This cannot work, because Foo_Type is no PyObject but a PyVarObject
> (independent
> of the use of PyVarObject_HEAD_INIT or PyObject_HEAD_INIT). The code
> line would
> work so:
>
> ((PyObject *)&Foo_Type)->ob_type = &PyType_Type
However, this is not what you should use. Instead, use
Py_Type(&Foo_Type) = &PyType_Type
> If the type is not subtypable (doesn’t have the
> Py_TPFLAGS_BASETYPE flag bit set), it is permissible to call the
> object deallocator directly instead of via tp_free.
> "
>
> What ? Where do we "call" these methods ?
You should typically call tp_free inside of tp_dealloc. For example,
string_dealloc ends with
Py_TYPE(op)->tp_free(op);
In the specific case (Py_TYPE(op) is not subtypeable), you could
alternatively also call
PyObject_Del(op);
If there are subclasses, they might have used a different allocator
(rather than the object allocator), hence you must call the deallocator
through tp_free.
HTH,
Martin
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