Benjamin Peterson wrote:
Why do you need to set Py_TPFLAGS_HEAPTYPE on your C type?
I think he *doesn't* want to set Py_TPFLAGS_HEAPTYPE, but does want to create the type dynamically.
But I suspect this is actually FUD, and that letting Py_TPFLAGS_HEAPTYPE be set wouldn't lead to anything disastrous happening.
Note that by not giving instances a __dict__, they will be prevented from having arbitrary attributes set on them, which is the most noticeable distinction between built-in and user-defined types.