Jeroen Demeyer wrote:
I have a concrete use case where I want something like __dealloc__ but
> *before* Python attributes are cleared. So this really belongs in tp_clear().
Are you sure you can't do it in __del__? From what I gather, the presence of __del__ no longer prevents cyclic garbage collection.
I never really understood the technical difference between tp_clear() and tp_dealloc(). It seems to me that these serve a very similar purpose: why can't the garbage collector just call tp_dealloc()?
tp_dealloc is the inverse of tp_alloc -- its purpose is to free the memory occupied by the object. This must not be done until there are no more references to the object. tp_clear is used to break reference cycles. After calling it, there may still be references to the object from other objects in the cycle, so tp_dealloc can't be done at that point. -- Greg _______________________________________________ cython-devel mailing list cython-devel@python.org https://mail.python.org/mailman/listinfo/cython-devel
